Articles de revues : « Advanced Photochemical Oxidation process »

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Sörensen, Martin, et Fritz H. Frimmel. « Photodegradation of EDTA and NTA in the UV / H2O2 Process ». Zeitschrift für Naturforschung B 50, n^o 12 (1 décembre 1995) : 1845–53. http://dx.doi.org/10.1515/znb-1995-1211.

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The influence of H2O2 on the UV degradation of the broadly used aminopolycarboxylates EDTA and NTA in aqueous solution was investigated. The photochemical degradation in the UV /H2O2 process was compared with classical oxidative treatment of potable water. The German drinking water regulation (Trinkwasserverordnung) was the orientation for all experiments. The Advanced Oxidation Process (AOP) turned out to be superior to the classical oxidation processes. The photochemical degradation of EDTA and NTA by UV irradiation could be significantly stimulated in the presence of H2O2. There was a strong increase in the degradation rate and a decrease in the quantum yield of the aminopolycarboxylates. Experiments with butyl chloride as radical scavenger proved the photolytically generated hydroxyl radicals to be responsible for the increase in the degradation rates.The effect of increasing the degradation rate at higher concentrations of H2O2 was limited, because the steady-state concentrations of the hydroxyl radicals as reactive species, did not increase at the same rate as the initial concentration of H2O2.Low amounts of iron dissolved from the high-grade steel photoreactor walls had a significant catalytic effect on the degradation.

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Sokol, Aneta, Artur Ratkiewicz, Iwona Tomaszewska et Joanna Karpinska. « Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide ». Water 13, n^o 13 (30 juin 2021) : 1813. http://dx.doi.org/10.3390/w13131813.

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Studies on kinetics of galaxolide (HHCB) degradation under influence of UV, simulated sunlight and some advanced oxidation processes (H2O2, UV/H2O2, and Vis/H2O2) were conducted. Galaxolide appeared to be a photolabile compound. The first-order kinetics model was assumed for all studied processes. It was observed that basic pH favored HHCB degradation. The influence of natural matrices (river water and artificial sweat) on direct photolysis of HHCB was examined. It was stated that the process of the photodegradation proceeded slower at the presence of each matrix. HHCB lactone was identified using the GC-MS technique. The recorded chromatograms showed that apart from the lactone, other degradation products were formed that we could not identify. In order to deeper understand the HHCB degradation process, DFT calculations were performed. The results pointed out that OH radicals play a key role in HHCB decomposition, which mainly proceeds via H abstractions as well as OH additions. It follows from the calculations that the visible light is sufficient to initiate the advanced oxidation processes (AOPs) under the oxidative conditions, whereas UV irradiation is needed to start decay with no oxidative agents.

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Rahmah, Anisa Ur, Sabtanti Harimurti, Kiki Adi Kurnia, Abdul Aziz Omar et Thanabalan Murugesan. « Oxytetracycline Mineralization inside a UV/H2O2 System of Advanced Oxidation Processes : Inorganic By-Product ». Bulletin of Chemical Reaction Engineering & ; Catalysis 16, n^o 2 (4 avril 2021) : 302–9. http://dx.doi.org/10.9767/bcrec.16.2.10308.302-309.

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Oxytetracycline (OTC) was widely used antibiotic in agricultural industry. However, most of them were secreted from the body and entered the water stream, due to low absorption. The occurrence of the antibiotics in water stream may led to serious health hazards. Hence, finding the effective method that capable to achieve total mineralization of antibiotic-contaminated wastewater, followed by the production of benign inorganic and organic by-product, was necessarily deemed. Photochemical degradation method, such as: UV/H2O2 system, was capable to achieve total mineralization of OTC at its optimized condition. In this paper, inorganic by-products of OTC mineralization inside a UV/H2O2 system at its optimum condition were analyzed. The presence of nitrate, ammonium, chloride ions, and chlorine were detected at the sample solution after mineralization. The presence of these inorganic by-product has proven that the experimental setup chosen was capable to achieve total mineralization. In addition, possible routes of the inorganic by-products detachment from the OTC’s structure, were also presented. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Tao, Yuhan. « Advanced Oxidation Processes for Water Purification Applications ». International Journal of Innovation and Entrepreneurship 1, n^o 1 (8 décembre 2022) : 1. http://dx.doi.org/10.56502/ijie1010002.

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The contamination of water resources has become a significant challenge that threatens the health and well-being of people’s daily life; it calls for new technologies to be applied for water purification. Heterogeneous Fenton or Fenton-like techniques have a lot of potential as a new approach for treating wastewater because of the advantages in efficiency, safety, and economics. Various advanced oxidation processes (AOPs) are comprehensively reviewed in this work, and the •OH generation methods including chemical, electro-chemical, and photochemical approaches are summarized. Some key parameters that influence the reaction efficiency such as the temperature, catalysts, H2O2 dosage, and pH are investigated. The reaction mechanism and process optimization of photocatalysis are specifically highlighted.

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Yue, P. L., et O. Legrini. « Photochemical Degradation of Organics in Water ». Water Quality Research Journal 27, n^o 1 (1 février 1992) : 123–38. http://dx.doi.org/10.2166/wqrj.1992.007.

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Abstract Trichloroethylene, phenol, 4-cholorophenol, catechol and a pesticide were degraded by two advanced oxidation processes: photolytic oxidation with hydrogen peroxide, andphotolytic oxidation with ozone. The reactions were studied in a batch photoreactor with a low pressure mercury lamp as the radiation source. The variation of the concentration of total organic carbon with time was measured. For the organics studied, the reaction kinetics for the reduction of total organic carbon (TOC) were found to follow a power law. The exponent of the power law varies with the initial TOC concentration. Results show that TOC can be very effectively reduced provided the concentration of hydrogen peroxide used exceeds a certain threshold value. The UV/Ozone process yielded a more rapid rate of degradation and a greater degree of mineralisation.

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Ion, Rodica-Mariana, Lorena Iancu, Ramona Marina Grigorescu et Madalina Elena David. « Adsorption Processes Coupled with Photochemical Depolution of Waters Contaminated with Direct Orange-26 Azo Dye ». Scientific Bulletin of Valahia University - Materials and Mechanics 18, n^o 18 (1 avril 2022) : 33–37. http://dx.doi.org/10.2478/bsmm-2022-0005.

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Abstract The present work aims to study the adsorption processes and the photochemical depollution of the waters contaminated with Direct Orange textile dyes - 26 released into the water. Also, the paper shows the polysulfone (PSf) membranes, used for adsorption processes of the textile dyes azo - direct-orange-26, presenting the kinetics and experimental adsorption conditions for such processes. Advanced oxidation processes (AOP) processes used in photochemical depollution technologies are studied for water contaminated with Direct Orange 26 textile dye, after a preliminary adsorption process, with ZnFe2O4 ferrite photocatalysts.

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Bacardit, J., V. García-Molina, B. Bayarri, J. Giménez, E. Chamarro, C. Sans et S. Esplugas. « Coupled photochemical-biological system to treat biorecalcitrant wastewater ». Water Science and Technology 55, n^o 12 (1 juin 2007) : 95–100. http://dx.doi.org/10.2166/wst.2007.385.

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The aim of the present work is to study a coupled system to treat biorecalcitrant wastewaters. The combination consists of an advanced oxidation process (AOP) named photo-Fenton (Ph-F), which is a photochemical treatment and a sequencing batch biofilter reactor (SBBR). The synthetic wastewater used to optimise this process is a solution of 200 ppm of 4-chlorophenol (4-CP). The first part of the work is the study of the biodegradability enhancement achieved by the photochemical process, measured as the ratio between the biochemical oxygen demand (BOD5) and the chemical oxygen demand (COD). The second step is the start-up and optimisation of the biological process. The results showed that it is necessary to severely treat the toxic solution (with 500 ppm of [H2O2]0) in order to achieve more than 90% of TOC removal in the whole process. The photochemical and biological treatments lasted 50 minutes and 24 hours, respectively.

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Budaev, Sayan L., Agniya A. Batoeva, Belegma A. Tsybikova, Marina S. Khandarkhaeva et Denis G. Aseev. « Photochemical degradation of thiocyanate by sulfate radical-based advanced oxidation process using UVС KrCl-excilamp ». Journal of Environmental Chemical Engineering 9, n^o 4 (août 2021) : 105584. http://dx.doi.org/10.1016/j.jece.2021.105584.

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Nikolić, Vladimir M., Slavko D. Karić, Željka M. Nikolić, Miloš S. Tošić, Gvozden S. Tasić, Dubravka M. Milovanovic et Milica P. Marčeta Kaninski. « Novel photochemical advanced oxidation process for the removal of polycyclic aromatic hydrocarbons from polluted concrete ». Chemical Engineering Journal 312 (mars 2017) : 99–105. http://dx.doi.org/10.1016/j.cej.2016.11.117.

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Awungacha Lekelefac, Colin, Nadine Busse, Michael Herrenbauer et Peter Czermak. « Photocatalytic Based Degradation Processes of Lignin Derivatives ». International Journal of Photoenergy 2015 (2015) : 1–18. http://dx.doi.org/10.1155/2015/137634.

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Photocatalysis, belonging to the advanced oxidation processes (AOPs), is a potential new transformation technology for lignin derivatives to value added products (e.g., phenol, benzene, toluene, and xylene). Moreover, lignin represents the only viable source to produce aromatic compounds as fossil fuel alternative. This review covers recent advancement made in the photochemical transformation of industrial lignins. It starts with the photochemical reaction principle followed by results obtained by varying process parameters. In this context, influences of photocatalysts, metal ions, additives, lignin concentration, and illumination intensity and the influence of pH are presented and discussed. Furthermore, an overview is given on several used process analytical methods describing the results obtained from the degradation of lignin derivatives. Finally, a promising concept by coupling photocatalysis with a consecutive biocatalytic process was briefly reviewed.

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Singh, Gitika Saheb, et C. Srinivas. « A REVIEW STUDY ON ORGANIC WASTE MANAGEMENT BY GREEN CHEMISTRY ». Green Chemistry & ; Technology Letters 6, n^o 1 (13 juillet 2020) : 04–13. http://dx.doi.org/10.18510/gctl.2020.612re.

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Purpose: The review article discusses the title topic describing mostly authors' work on green chemical, photochemical and electrochemical methods for the treatment of organic wastes present in different matrices. Emphasis is mainly placed on the importance of the matrix, associated compounds and the method's selection. Methodology: Different green methods of treatment for organic waste available are reviewed with an outline of scientific principles. Different case studies, from the authors, work, involving the treatment of organic waste present in different matrices are discussed. Available green chemical, photochemical, and electrochemical methods are reviewed, and results obtained are described and discussed. The rationale behind the choice of method was discussed in detail. Laboratory to plant adoption and the considerations therein are considered. Main findings: The selection of treatment method depends on the nature of the organic waste and the matrix in which it is present. This has been brought out in the study. Advanced oxidation and electrochemical oxidation processes are practically useful methods for waste treatment and discussed with case studies. The optimization of the advanced oxidation process is still an empirical approach. It needs a sound scientific base. Applications of the work: The case studies described in the paper enable the proper choice of treatment method among several available options. The study covers the essential green chemical techniques, viz., photochemical and electrochemical techniques. The novelty of the work: Many of the organic substrates subjected to treatment study were rarely reported in the open literature. Laboratory to plant scale development and the factors involved therein have been brought in many places.

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Teixeira, Antonio Carlos Silva Costa, Lucas Mendes, Giselle Stollar, Roberto Guardani et Cláudio Augusto Oller do Nascimento. « Photo-fenton remediation of wastewaters containing agrochemicals ». Brazilian Archives of Biology and Technology 48, spe (juin 2005) : 207–18. http://dx.doi.org/10.1590/s1516-89132005000400026.

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The photochemical degradation of agrochemicals in aqueous solution by means of advanced oxidation processes (AOPs) was studied. The photo-Fenton process was evaluated in terms of the time evolution of dissolved organic carbon (COD) and chemical oxygen demand (DOC), their total removals, and increase in biodegradability of treated wastewater. Under the experimental conditions studied, the process showed to be superior to other AOPs, at any Fe(II) and H2O2 concentrations. The results pointed towards the use of solar irradiation and low cost commercial application.

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Braun, André M., et E. Oliveros. « How to evaluate photochemical methods for water treatment ». Water Science and Technology 35, n^o 4 (1 février 1997) : 17–23. http://dx.doi.org/10.2166/wst.1997.0076.

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Photochemical advanced oxidation processes (AOPs) generally imply generation of hydroxyl radicals which are initiating the oxidative degradation by well defined reactions (hydrogen abstraction, addition and electron transfer) with available organic substrates. This limitation of the scope of applications may be avoided in implementing combinations of different photochemical and/or thermal processes. A simple evaluation of photochemical AOPs is based on the absorption spectrum of the oxidant to be added and on the spectral distribution of the emission of commercially available light sources. Dominating light absorption, in particular in the UV-C spectral domain, by the solutes of the aqueous system to be treated may lead to exclude some of the degradation processes, as excitation of the oxidant and, consequently, production of the initiator become inefficient with increasing inner filter effects. The evaluation of photochemical AOPs in terms of volume independent rates is convenient and highly advocated, but such comparisons should only be made for processes applied to a restricted number of model substrates which are to be degraded in optimized equipment. Taking into account the volume independent rates determined in the range of realistic pollutant concentrations, the number of m3 of contaminated water of known pollutant nature and concentration to be treated per unit of time, the list of a commercially available light sources and their geometry, a final selection of the degradation process or of a combination of processes may be made, and the total electrical energy required and the number of photochemical reactors to be built may be calculated.

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Zhang, Yiqing, Kashif Shaad, Derek Vollmer et Chi Ma. « Treatment of Textile Wastewater Using Advanced Oxidation Processes—A Critical Review ». Water 13, n^o 24 (9 décembre 2021) : 3515. http://dx.doi.org/10.3390/w13243515.

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Textile manufacturing is a multi-stage operation process that produces significant amounts of highly toxic wastewater. Given the size of the global textile market and its environmental impact, the development of effective, economical, and easy-to handle alternative treatment technologies for textile wastewater is of significant interest. Based on the analysis of peer-reviewed publications over the last two decades, this paper provides a comprehensive review of advanced oxidation processes (AOPs) on textile wastewater treatment, including their performances, mechanisms, advantages, disadvantages, influencing factors, and electrical energy per order (EEO) requirements. Fenton-based AOPs show the lowest median EEO value of 0.98 kWh m−3 order−1, followed by photochemical (3.20 kWh m−3 order−1), ozonation (3.34 kWh m−3 order−1), electrochemical (29.5 kWh m−3 order−1), photocatalysis (91 kWh m−3 order−1), and ultrasound (971.45 kWh m−3 order−1). The Fenton process can treat textile effluent at the lowest possible cost due to the minimal energy input and low reagent cost, while Ultrasound-based AOPs show the lowest electrical efficiency due to the high energy consumption. Further, to explore the applicability of these methods, available results from a full-scale implementation of the enhanced Fenton technology at a textile mill wastewater treatment plant (WWTP) are discussed. The WWTP operates at an estimated cost of CNY ¥1.62 m−3 (USD $0.23 m−3) with effluent meeting the China Grade I-A pollutant discharge standard for municipal WWTPs, indicating that the enhanced Fenton technology is efficient and cost-effective in industrial treatment for textile effluent.

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Zaki, Hassan Adel, et Khaled Zaher. « A comparative study of landfill leachate treatment using advanced oxidation photochemical processes, ozonation process and hydrogen peroxide systems ». DESALINATION AND WATER TREATMENT 261 (2022) : 107–19. http://dx.doi.org/10.5004/dwt.2022.28496.

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Kishimoto, Naoyuki, et Hideya Nishimura. « Effect of pH and molar ratio of pollutant to oxidant on a photochemical advanced oxidation process using hypochlorite ». Environmental Technology 36, n^o 19 (21 avril 2015) : 2436–42. http://dx.doi.org/10.1080/09593330.2015.1034187.

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Muszyński, Paweł, Marzena S. Brodowska et Tadeusz Paszko. « Occurrence and transformation of phenoxy acids in aquatic environment and photochemical methods of their removal : a review ». Environmental Science and Pollution Research 27, n^o 2 (1 décembre 2019) : 1276–93. http://dx.doi.org/10.1007/s11356-019-06510-2.

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AbstractThe article presents the behavior of phenoxy acids in water, the levels in aquatic ecosystems, and their transformations in the water environment. Phenoxy acids are highly soluble in water and weakly absorbed in soil. These highly mobile compounds are readily transported to surface and groundwater. Monitoring studies conducted in Europe and in other parts of the world indicate that the predominant phenoxy acids in the aquatic environment are mecoprop, 4-chloro-2-methylphenoxyacetic acid (MCPA), dichlorprop, 2,4-dichlorophenoxyacetic acid (2,4-D), and their metabolites which are chlorophenol derivatives. In water, the concentrations of phenoxy acids are effectively lowered by hydrolysis, biodegradation, and photodegradation, and a key role is played by microbial decomposition. This process is determined by the qualitative and quantitative composition of microorganisms, oxygen levels in water, and the properties and concentrations of phenoxy acids. In shallow and highly insolated waters, phenoxy acids can be decomposed mainly by photodegradation whose efficiency is determined by the form of the degraded compound. Numerous studies are underway on the use of advanced oxidation processes (AOPs) to remove phenoxy acids. The efficiency of phenoxy acid degradation using AOPs varies depending on the choice of oxidizing system and the conditions optimizing the oxidation process. Most often, methods combining UV radiation with other reagents are used to oxidize phenoxy acids. It has been found that this solution is more effective compared with the oxidation process carried out using only UV.

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Navarro, Patricia, Jean Pier Zapata, Gemma Gotor, Rafael Gonzalez-Olmos et Vicente M. Gómez-López. « Degradation of malachite green by a pulsed light/H2O2 process ». Water Science and Technology 79, n^o 2 (15 janvier 2019) : 260–69. http://dx.doi.org/10.2166/wst.2019.041.

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Abstract Pulsed light (PL) is a type of photonic technology characterized by intense short light pulses that enhance the speed of photochemical reactions, and which might be useful as light source in advanced oxidation processes. This work aimed to test PL as light source for the degradation of the dye malachite green (MG) by combining PL with H2O2. To this end, the effect of dye and H2O2 concentrations and pH on the degradation rate of MG was studied and a degradation pathway was proposed. Dye degradation followed a pseudo-first order kinetics; it increased with low initial dye concentration, high H2O2 concentration and low pH. Complete decolourization was achieved after 35 light pulses (75 J/cm2), with a degradation rate of 0.0710 cm2/J. The degradation was initiated by the attack of hydroxyl radicals to the central carbon of MG generating 4-(dimethylamino)benzophenone (DLBP) followed by the addition of hydroxyl radicals to the non-amino aromatic ring of DLBP and the demethylation of the amino group. Results indicate that PL technology has potential to be implemented to decrease the environmental impact of dyeing industries.

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Cooper, William J., Weihua Song, Michael Gonsior, Daina Kalnina, Barrie M. Peake et Stephen P. Mezyk. « Recent advances in structure and reactivity of dissolved organic matter in natural waters ». Water Supply 8, n^o 6 (1 décembre 2008) : 615–23. http://dx.doi.org/10.2166/ws.2008.141.

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The goal of our research is to better understand the structure and reactivity of natural dissolved organic matter (DOM) in aquatic environments. A more detailed knowledge of these DOM characteristics would lead to a better understanding of carbon cycling in natural waters and processes associated with water treatment using free radical chemistry. Our specific interest in DOM in natural waters is several-fold: 1) the photochemical formation of reactive oxygen species, 2) photobleaching of the DOM in coastal oceans, and 3) using chromophoric DOM (CDOM) as a tracer of water masses and in carbon cycling. Our interest in water treatment is that DOM is the major sink of hydroxyl radicals employed in advanced oxidation processes for the destruction of pollutants and thus adversely affects the efficiency of the process. We are using the techniques of radiation chemistry to explore the fundamental free radical and redox chemistry of DOM. We have initiated a study of the free radical reactions of DOM using isolated fractions of Suwannee River fulvic and humic acids and isolates from various anthropogenic sources. We are also investigating the use of model compounds in an attempt to understand the free radical transients formed from DOM either as a result of free radical reactions or photochemical reactions.

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Kenfack, S., V. Sarria, J. Wéthé, G. Cissé, A. H. Maïga, A. Klutse et C. Pulgarin. « From Laboratory Studies to the Field Applications of Advanced Oxidation Processes : A Case Study of Technology Transfer from Switzerland to Burkina Faso on the Field of Photochemical Detoxification of Biorecalcitrant Chemical Pollutants in Water ». International Journal of Photoenergy 2009 (2009) : 1–8. http://dx.doi.org/10.1155/2009/104281.

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The Fenton and photo-Fenton detoxification of non-biodegradable chemical pollution in water was investigated under simulated UV light in the laboratory and under direct sunlight in Ouagadougou, Burkina Faso. The laboratory experiments enable one to make a systematic diagnosis among three types of wastewaters, identifying a biorecalcitrant wastewater containing the Chloro-hydroxy-Pryridine (CHYPR). The application of the photo-Fenton process on effluent containing the CHYPR showed not to stimulate the generation of biodegradable by-products. Optimal conditions for detoxification of effluent containing the CHYPR were found atpH=2.8,[Fe2+]=5.2 mM, initial[H2O2]=768 mM, for an effluent concentrated at 2.2 mM of CHYPR. The application of the photochemical process on a field pilot solar photoreactor for the detoxification of water polluted with a pesticide made with Endosulfan showed very promising results, with potential biodegradable effluents obtained at the end of the photochemical treatment. Optimal conditions of the applied study were found atpH=3.[H2O2]=8 mM and[Fe2+]=0.18 mM for an initial concentration of 0.36 mM of Endosulfan.

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Haseneder, R., B. Fdez-Navamuel et G. Härtel. « Degradation of polyethylene glycol by Fenton reaction : a comparative study ». Water Science and Technology 55, n^o 12 (1 juin 2007) : 83–87. http://dx.doi.org/10.2166/wst.2007.391.

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Photochemical advanced oxidation processes (AOPs) utilising different Fenton systems were investigated in laboratory-scale experiments for the degradation of polyethylene glycol (PEG). The results of the study showed that the degradation rate of PEG was strongly accelerated by the homogeneous system, and this proved to be advantageous in comparison to the heterogeneous system. Between Fenton and photo-Fenton heterogeneous systems, the photo-Fenton process reached the highest removal rate of the organic compound, due to the enhanced reduction efficiency of Fe(III) to Fe(II) under UV-irradiation. The oxidation rate in the heterogeneous system was investigated using varying different parameters, such as the pH value, the concentration of hydrogen peroxide and the amount of Fe(OH)3 as the catalyst. For the homogeneous Fenton system the rate of degradation is significantly higher. At the same time of operation the elimination rates can be found to be 30% over the rates of the heterogeneous system. Optimising the typical influence parameters mentioned before, a degradation of about 93% of PEG can be achieved by using the homogeneous Fenton system.

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Arslan-Alaton, I., G. Eremektar, F. Germirli-Babuna, G. Insel, H. Selcuk, B. Ozerkan et S. Teksoy. « Advanced Oxidation of Commercial Textile Biocides in Aqueous Solution : Effects on Acute Toxicity and Biomass Inhibition ». Water Science and Technology 52, n^o 10-11 (1 novembre 2005) : 309–16. http://dx.doi.org/10.2166/wst.2005.0707.

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In the present study, the decomposition of two biocides used in the textile finishing process with Advanced Oxidation Processes (AOPs) has been studied. Different AOPs, i.e O3/OH−, TiO2/UV-A and Fe2+/H2O2 have been used representing mutually combined components of the chemically and photochemically driven advanced oxidation systems. The course of reaction was examined by changes in chemical oxygen demand (COD), total organic carbon (TOC) and acute toxicity towards the water flea Daphnia magna (assessed in terms of the effective dilution ratio LD50). Particular attention has been paid to determine the inhibitory effect of raw and ozonated biocides on biological activated sludge consortium at concentrations typically encountered in textile finishing effluents. Significant oxidation and mineralization of both biocides could be achieved employing ozonation at pH=11.5 and heterogeneous photocatalysis (TiO2/UV-A) at pH = 5.0, whereas Fenton's reagent appeared to be less effective in COD and acute toxicity abatement.

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Sarria, V., S. Parra, M. Invernizzi, P. Péringer et C. Pulgarin. « Photochemical-biological treatment of a real industrial biorecalcitrant wastewater containing 5-amino-6-methyl-2-benzimidazolone ». Water Science and Technology 44, n^o 5 (1 septembre 2001) : 93–101. http://dx.doi.org/10.2166/wst.2001.0259.

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5-amino-6-methyl-2-benzimidazolone (AMBI), used in the manufacture of dyes, was characterised as a biorecalcitrant compound by means of different biodegradability tests. In order to enhance the biodegradability of this important pollutant, the application of Advanced Oxidation Process (AOPs) as a pre-treatment was explored. Some experiments were addressed to find the most efficient AOP. The systems H2O2/hv, TiO2/H2O2/hv, Fe3+/hv, Fe3+/H2O2 and Fe3+/H2O2/hv were compared. The photo-Fenton system was the most efficient and the optimal conditions (AMBI, Fe3+, H2O2 concentrations) for the degradation of AMBI were found. During the photo-Fenton degradation, experiments were also made to obtain information concerning the evolution of: (a) organic carbon and initial compound concentration; (b) the oxidation state; (c) the toxicity; (d) the biodegradability; and (e) the chemical nature of the intermediates. These analyses show that the solution resulting from the treatment of AMBI is biologically compatible and complete mineralisation can be performed by biological means. A combined photochemical (Fenton) and biological flow reactor for the degradation of AMBI was successfully operated in continuous mode at laboratory scale. 100% of the initial concentration of AMBI and 80.3% of Dissolved Organic Carbon (DOC) were removed in 3.5 hours of total residence time. Finally, some field experiments under direct sunlight carried out at the Plataforma Solar de Almeria, Spain, demonstrated that this solar catalytic system is an effective treatment for this kind of industrial wastewater.

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Thomas, Maciej, Barbara Białecka et Dariusz Zdebik. « Removal of organic compounds from wastewater originating from the production of printed circuit boards by UV-Fenton method ». Archives of Environmental Protection 43, n^o 4 (1 décembre 2017) : 39–49. http://dx.doi.org/10.1515/aep-2017-0044.

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AbstractThe possibility of removing organic compounds from wastewater originating from the photochemical production of printed circuit boards by use of waste acidification and disposal of precipitated photopolymer in the first stage and the UV-Fenton method in a second stage has been presented. To optimize the process of advanced oxidation, the RSM (Response Surface Methodology) for three independent factors was applied, i.e. pH, the concentration of Fe(II) and H2O2concentration. The use of optimized values of individual parameters in the process of wastewater treatment caused a decrease in the concentration of the organic compounds denoted as COD by approx. 87% in the first stage and approx. 98% after application of both processes. Precipitation and the decomposition of organic compounds was associated with a decrease of wastewater COD to below 100 mg O2/L whereas the initial value was 5550 mg O2/L. Decomposition of organic compounds and verification of the developed model of photopolymers removal was also carried out with use of alternative H2O2sources i.e. CaO2, MgO2, and Na2CO3·1,5H2O2.

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Jazić, Jelena Molnar, Jasmina Agbaba, Aleksandra Tubić, Malcolm Watson, Tajana Đurkić, Dejan Krčmar et Božo Dalmacija. « Effect of photochemical advanced oxidation processes on the formation potential of emerging disinfection by-products in groundwater from part of the Pannonian Basin ». Water Supply 19, n^o 5 (27 décembre 2018) : 1388–95. http://dx.doi.org/10.2166/ws.2018.196.

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Abstract This study evaluates the effect of photochemical advanced oxidation processes (AOPs) (O3/UV, H2O2/UV and O3/H2O2/UV) on the formation potential (FP) of emerging disinfection by-products including nitrogenous by-products (N-DBPs) and haloketones (HKs) in groundwater from part of the Pannonian Basin (AP Vojvodina, Republic of Serbia). Among the N-DBPs, the haloacetonitrile (HAN) precursor contents were 9.83 ± 0.59 μg/L while precursors of halonitromethanes, particularly trichloronitromethane (TCNM) were not detected. Similarly, precursors of HKs as carbonaceous DBPs were also not detected in raw water. Ozonation alone and the H2O2/UV process with a lower UV dose maximally decomposed HAN precursors (about 70%) while during O3-based AOPs, HANFP varied significantly. Application of UV photolysis and H2O2/UV processes with increasing UV dose doubled the HANFP. Ozone alone, O3/UV and H2O2/UV slightly increased HK formation potential, particularly 1,1-dichloro-2-propanone FP (0.93 ± 0.21 to 2.01 ± 0.37 μg/L). None of the investigated treatments influenced the formation of TCNM precursors. The effect of the applied treatments on bromide incorporation was most evident for HANs.

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Mishra*, Ajay Kumar, et B. S. Panigrahi. « Synthesis of Zirconia in Cement (Zir-Cem) and Study of Adsorption of EDTA on Zir-Cem ». International Journal of Engineering and Advanced Technology 12, n^o 1 (30 octobre 2022) : 23–33. http://dx.doi.org/10.35940/ijeat.a3153.1012122.

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The important problem to address in nuclear industries involves mitigation of the radioactive and corrosion products of nuclear reactor components. Even though physical and chemical methods lend a helping hand in solving this problem, the dominant method is by carrying out chemical cleaning. But this process results in the metal ions in complex state, not viable for treatment. To render the metal ions in the free state advanced oxidation process using oxidizing agents like ozone, Hydrogen peroxide, electro flotation, supercritical oxidation etc can be resorted . The decontaminating agents used are picolinic acid, EDTA, ascorbic acid, NTA etc. EDTA complex the metal ions but generate secondary waste with them. In our work, treatment of generated decontaminated waste using EDTA as decontaminant has been dealt with. From the literature, we understand that attempts have been made to degrade ethylene diamine tetraacetic acid using Fenton’s reagent in the presence of light [1]. This will facilitate the release of free radioactive ions for further treatment. In addition to chemical oxidation of EDTA, photochemical oxidation in presence of Zirconia and titania which generates electrons and positive ions for further oxidation has been reported [2]. In this paper, we have made an attempt to absorb the EDTA on zirconia loaded on white cement, study the adsorption characteristics which is the first step for photodegradation using UV light. Zirconium oxide was synthesized by the sol-gel method using Zirconium isopropoxide to water ratio 1:2 which resulted in powder by this process. This Powder was characterized for physical and chemical parameters before immobilizing with cement for adsorption. The system containing cement bonded to Zirconia (Zir-Cem) was subjected to removal of EDTA by adsorption. Since the zirconia powder as generated was found to have a high surface area compared to heat-treated (470oC and 720oC resulting in monoclinic and tetragonal crystalline forms) the as prepared zirconia was found to be the best candidate for efficient adsorption.

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Hu, Bing, Peiwei Hu, Biao Lu, Zhicheng Xie, Liu Liu, Gangli Cheng et Jiaoyang Wei. « NOx Emission Reduction by Advanced Reburning in Grate-Rotary Kiln for the Iron Ore Pelletizing Production ». Processes 8, n^o 11 (16 novembre 2020) : 1470. http://dx.doi.org/10.3390/pr8111470.

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The NOx reduction in the iron ore pelletizing process becomes an important environmental concern owing to its role in the formation of photochemical smog and acid rain. Thus, it is essential to develop new technologies for reducing NOx emissions in order to contribute to the cleaner production of pellets. In this paper, NOx reduction by advanced reburning ingrate-rotary kiln for oxidized pellet production was performed on a laboratory-scale gas kiln. Temperature and NH3/NOx molar ratio (NSR) were the key factors affecting the reduction of NOx. A better denitrification effect can be obtained on flus gas with higher initial NOx concentration, at temperature = 900 °C, NSR = 1.2, and reaction time exceeds one second. NOx reduction rate had reached 55–65% when the initial NOx concentration was above 400 ppm, and exceeds 70% when the initial NOx concentration was around 680 ppm. Urea solution has the best denitrification effect compared with NH3·H2O and NH4HCO3 solution. As for additives, the denitrification effect of the vanadium-titanium catalyst was better than that of ethanol and NaCl, while NaCl plays a promotive role at low NSR. Finally, a series of denitrification measures that include advanced reburning technology for achieving NOx ultra-low emission in the oxidation pellet production was proposed.

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Twigg, Martyn V. « Controlling automotive exhaust emissions : successes and underlying science ». Philosophical Transactions of the Royal Society A : Mathematical, Physical and Engineering Sciences 363, n^o 1829 (15 avril 2005) : 1013–33. http://dx.doi.org/10.1098/rsta.2005.1547.

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Photochemical reactions of vehicle exhaust pollutants were responsible for photochemical smog in many cities during the 1960s and 1970s. Engine improvements helped, but additional measures were needed to achieve legislated emissions levels. First oxidation catalysts lowered hydrocarbon and carbon monoxide, and later nitrogen oxides were reduced to nitrogen in a two-stage process. By the 1980s, exhaust gas could be kept stoichiometric and hydrocarbons, carbon monoxide and nitrogen oxides were simultaneously converted over a single ‘three-way catalyst’. Today, advanced three-way catalyst systems emissions are exceptionally low. NO x control from lean-burn engines demands an additional approach because NO cannot be dissociated under lean conditions. Current lean-burn gasoline engine NO x control involves forming a nitrate phase and periodically enriching the exhaust to reduce it to nitrogen, and this is being modified for use on diesel engines. Selective catalytic reduction with ammonia is an alternative that can be very efficient, but it requires ammonia or a compound from which it can be obtained. Diesel engines produce particulate matter, and, because of health concerns, filtration processes are being introduced to control these emissions. On heavy duty diesel engines the exhaust gas temperature is high enough for NO in the exhaust to be oxidised over a catalyst to NO 2 that smoothly oxidises particulate material (PM) in the filter. Passenger cars operate at lower temperatures, and it is necessary to periodically burn the PM in air at high temperatures.

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Xie, Wenxia, Chengwei Xu, Jun Zhang, Yangxian Liu, Jianfei Xi, Zhongzhu Gu et Jianhong Lv. « Effects of experimental parameters on simultaneous removal of SO2 and NO by VUV/H2 O2 advanced oxidation process in a pilot-scale photochemical spraying tower ». Journal of Chemical Technology & ; Biotechnology 94, n^o 3 (28 novembre 2018) : 721–29. http://dx.doi.org/10.1002/jctb.5816.

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Yoon, Dal Hwan, Hoon Min Park, Hyun Min Jung, Heong Hoon Jung, Heung Ki Min et Dong Hwan Jeon. « VOCs Oxidation Treatment and Waste Heat Recovery Technology through the Implementation of Heat Storage Type Combustion Oxidation Device ». Forum of Public Safety and Culture 17 (30 juillet 2022) : 285–98. http://dx.doi.org/10.52902/kjsc.2022.17.285.

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The reduction of greenhouse gases and Carbon Neutral (Carbon Zero) due to global warming is agreed by all countries around the world. The increase in global average temperature to climate change is kept within 2°C compared to before industrialization and achieved 1.5°C in the long run. Korea has set a 37% reduction target (315 million tons) compared to the 2030 emission forecast (851 million tons) and is promoting various air pollution reduction technologies and R&D policies to reduce greenhouse gases and minimize the impact on climate change. Currently, there are VOCs that are directly emitted into the atmosphere or that cause greenhouse gases as simple power generation and heat sources. Aromatic hydrocarbons such as benzene are strong carcinogens that cause leukaemia, central nervous disorder, chromosomal abnormalities, and hydrochloride can produce photochemical oxides by destruction of the ozone layer, global warming, and chain reactions of volatile organic compounds, causing eye irritation, reduced visibility, and damage to plants and crops. VOCs reduction technology should reduce the amount of harmful substances in advance by controlling operating conditions and working conditions. Technologies that can effectively process VOCs throughput of 95% or more are heat storage combustion systems and heat storage catalyst combustion systems. This paper proposes a heat delivery system specification design and emission concentration measurement technology for high-efficiency waste heat recovery of 100 CMM RTO (Regenerative Thermal Oxidation) device to reduce air pollution in VOCs generating sites. For the application of the waste heat recovery system, a 100CMM heat storage combustion oxidation system (RTO) is designed, and the performance is evaluated by measuring the concentration of VOC (Volatile Organic Compound) emissions according to production process operating conditions.

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Pretali, Luca, Angelo Albini, Alice Cantalupi, Federica Maraschi, Stefania Nicolis et Michela Sturini. « TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method : New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters ». Applied Sciences 11, n^o 6 (11 mars 2021) : 2486. http://dx.doi.org/10.3390/app11062486.

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The photodegradation of the most prescribed glucocorticoids (GCs) was studied under relevant environmental conditions in the presence of suspended TiO2. The considered drugs included cortisone (CORT), hydrocortisone (HCORT), betamethasone (BETA), dexamethasone (DEXA), prednisone (PRED), prednisolone (PREDLO), and triamcinolone (TRIAM). The experiments were carried out at concentrations (50 µg L−1) close to the real ones in freshwater samples (tap and river) under simulated and natural sunlight, and their decomposition took place very efficiently under natural sunlight. The reactions were monitored by high-pressure liquid chromatography coupled to electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). According to a pseudo-first-order decay, all drugs underwent degradation within 15 min, following different paths with respect to the direct photolysis. The observed kinetic constants, slightly lower in river than in tap water, varied from 0.29 to 0.61 min−1 with modest differences among GCs in the same matrix. Among main matrix macro-constituents, humic acids (HAs) were the most interfering species involved in GCs degradation. The photogenerated primary products were identified by HPLC-ESI-MS/MS, allowing to elucidate the general photochemical path of GCs. Finally, a comparison with literature data obtained using different advanced oxidation processes (AOPs) highlights the treatment efficiency with TiO2/solar light for removing such persistent aquatic contaminants.

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Oliveros, E., O. Legrini, M. Hohl, T. Müller et A. M. Braun. « Large scale development of a light-enhanced fenton reaction by optimal experimental design ». Water Science and Technology 35, n^o 4 (1 février 1997) : 223–30. http://dx.doi.org/10.2166/wst.1997.0124.

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Photochemical advanced oxidation processes (AOP) for the treatment of waste waters containing biocidal or non-biodegradable organic compounds rely mainly on the production of a potent oxidizing agent, the hydroxyl radical. The Fenton's reagent, a mixture of hydrogen peroxide and ferrous ion, represents one possible source of hydroxyl radicals and it has been shown recently that degradation rates may be significantly enhanced by UV/visible irradiation. In this context, we have investigated the feasibility of a large scale application of the light-enhanced Fenton reaction to the treatment of a highly contaminated industrial waste water containing toxic aromatic amines (dimethyl anilines or xylidines) as the main pollutants. Following preliminary laboratory tests performed on the model compounds, 2,4- and 3.4-xylidines (200 mg/L, 2 L), experimentation on the industrial waste water at a large scale level (3000 mgC/L, 500 L) has been carried out using the experimental design methodology for the simulation and the evaluation of the effects of the two critical factors, hydrogen peroxide and ferrous ion concentrations. The light-enhanced Fenton reaction has been proven to be a most effective treatment process under acidic conditions and might be an alternative to adsorption of xylidines on activated carbon as used at present.

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Olmez-Hanci, Tugba, et Idil Arslan-Alaton. « Persulfate-mediated Photocatalytic Degradation of Ciprofloxacin in Water Using Ultraviolet Light and Zero-valent Aluminum ». Journal of Photocatalysis 1, n^o 1 (2 octobre 2020) : 67–76. http://dx.doi.org/10.2174/2665976x01999200430012009.

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Aims: The study aimed at assessing the effectiveness of the PS/UV-C, PS/ZVA and PS/ZVA/UV-C processes in terms of ciprofloxacin, a fluoroquinolone type commercially important antibiotic, and toxicity abatements in raw surface water (RSW) and distilled water (DW). Background: The occurrence of ciprofloxacin (CIP), the most widely prescribed second-generation fluoroquinolone antibiotic, even at trace level (ng/L) gives rise to antibiotic resistant bacteria and resistance genes, which can further impair the selection of genetic variants of microorganisms and impose adverse effect on human health. Objective: The degradation and detoxification of ciprofloxacin with UV-C (PS/UV-C) and ZVA (PS/ZVA) activated PS oxidation systems were investigated in distilled water (DW) and raw (untreated) surface water (RSW) samples. Moreover, CIP degradation with the PS/ZVA/UV-C heterogeneous photochemical treatment combination was also studied. Methods: The process performances of the investigated treatment systems were evaluated in terms of CIP abatement and PS consumption rates as well as dissolved organic carbon (DOC) removal efficiencies. The influence of common inorganic ions and natural organic matter (NOM) on CIP degradation was evaluated. Radical quenching experiments were conducted using probe compounds in order to elucidate the dominant reaction mechanism. In addition, acute toxicity of the original CIP and its degradation products were questioned by employing Vibrio fischeri (V. fischeri), the marine photobacterium, under optimized treatment conditions. Results: CIP was completely degraded in distilled water (DW) and raw (untreated) surface water (RSW) samples after 15 min of treatment with the PS/UV-C process (PS=0.25mM; pH=3; UVC= 2.7W/m2). PS/UV-C experiments conducted with RSW at its natural pH (=8.5) resulted in 98% CIP and practically no DOC removal whereas 56% DOC was removed at pH 3 after 120 min. Radical quenching studies revealed that sulfate radicals prevailed over hydroxyl radicals. CIP degradation was significantly inhibited by the presence of humic acid due to the effect of UV absorption and free radical quenching. Acute toxicity tests with V. fischeri exhibited fluctuating trends throughout the investigated processes and did not change appreciably after 120 min of oxidation. Conclusion: The results of this study demonstrated that PS/UV-C is superior to the PS/ZVA and PS/ZVA/UV-C treatment systems for both DW and RSW samples in terms of CIP removal rates. No additional positive effect was evident for simultaneous catalytic and photochemical PS activation (PS/ZVA/UV-C treatment system). It could be also demonstrated that the selected oxidation processes conducted in pure water might give an idea about the advanced treatment systems but realistic conditions with actual water/wastewater matrices still need to be further investigated to verify their feasibility and ecotoxicological safety.

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Göb, S., E. Oliveros, S. H. Bossmann, A. M. Braun, C. A. O. Nascimento et R. Guardani. « Optimal experimental design and artificial neural networks applied to the photochemically enhanced Fenton reaction ». Water Science and Technology 44, n^o 5 (1 septembre 2001) : 339–45. http://dx.doi.org/10.2166/wst.2001.0321.

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Among advanced oxidation processes (AOPs), the photochemically enhanced Fenton reaction may be considered as one of the most efficient for the degradation of contaminants in industrial wastewater. This process involves a series of complex reactions. Therefore, an empirical model based on artificial neural networks has been developed for fitting the experimental data obtained in a laboratory batch reactor for the degradation of 2,4-dimethyl aniline (2,4-xylidine), chosen as a model pollutant. The model describes the evolution of the pollutant concentration during irradiation time as a function of the process conditions. It has been used for simulating the behavior of the reaction system in sensitivity studies aimed at optimizing the amounts of reactants employed in the process, an iron(III) salt and hydrogen peroxide, as well as the temperature. The results show that the process is most sensitive to the concentration of iron(III) salt and temperature, whereas the concentration of hydrogen peroxide has a minor effect.

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Shmychkova, O., V. Protsenko et A. Velichenko. « Wastewater treatment from pharmaceuticals : a review ». Voprosy Khimii i Khimicheskoi Tekhnologii, n^o 3 (mai 2021) : 4–31. http://dx.doi.org/10.32434/0321-4095-2021-136-3-4-31.

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A critical analysis of literature data on wastewater treatment from pharmaceuticals was carried out. It was shown that many different methods have been proposed for the treatment of wastewaters containing drugs, pharmaceuticals and veterinary medicines; all these methods can be classified as destructive and non-destructive ones. The traditional methods of wastewater treatment include the following: biological treatment, filtration and coagulation/flocculation/sedimentation processes, they being the most common in sewage purification. Some up-to-date and advanced methods (advanced oxidation processes, electrochemical treatment, etc.) are also known. The used methods of wastewater treatment from pharmaceuticals can be conventionally divided into several following groups: (i) chemical treatment with the addition of hydrogen peroxide and/or other oxidants, such as ozone and sodium hypochlorite, together with catalysts to the system; (ii) photocatalytic methods; and (iii) electrocatalytic methods. It was noted that peroxene-based systems are especially promising for practical application; they imply the use of hydroxyl radical as an effective oxidant that is formed from the primary oxidant by its catalytic decomposition. The so-called conditionally reagent-free methods are considered as an alternative to chemical treatment methods, they include electrocatalytic and photochemical techniques, where oxygen-containing radicals (i.e. oxidizing agents) are formed under the action of electric current or UV radiation on the proper catalysts. An additional advantage of electrochemical methods is the possibility of direct electrochemical destruction of organic substances. The main disadvantages of such methods as well as other heterogeneous catalytic systems are relatively high sensitivity to the composition of a catalyst and too low process rate due to decelerated delivery of pollutants to the interfacial boundary where the reaction occurs.

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Abanades, Stéphane. « Redox Cycles, Active Materials, and Reactors Applied to Water and Carbon Dioxide Splitting for Solar Thermochemical Fuel Production : A Review ». Energies 15, n^o 19 (26 septembre 2022) : 7061. http://dx.doi.org/10.3390/en15197061.

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The solar thermochemical two-step splitting of H2O and CO2 based on metal oxide compounds is a promising path for clean and efficient generation of hydrogen and renewable synthetic fuels. The two-step process is based on the endothermic solar thermal reduction of a metal oxide releasing O2 using a high-temperature concentrated solar heat source, followed by the exothermic oxidation of the reduced oxide with H2O and/or CO2 to generate pure H2 and/or CO. This pathway relates to one of the emerging and most promising processes for solar thermochemical fuel production encompassing green H2 and the recycling/valorization of anthropogenic greenhouse gas emissions. It represents an efficient route for solar energy conversion and storage into renewable and dispatchable fuels, by directly converting the whole solar spectrum using heat delivered by concentrating systems. This eliminates the need for photocatalysts or intermediate electricity production, thus bypassing the main limitations of the low-efficient photochemical and electrochemical routes currently seen as the main green methods for solar fuel production. In this context, among the relevant potential redox materials, thermochemical cycles based on volatile and non-volatile metal oxides are particularly attractive. Most redox pairs in two-step cycles proceed with a phase change (solid-to-gas or solid-to-liquid) during the reduction step, which can be avoided by using non-stoichiometric oxides (chiefly, spinel, fluorite, or perovskite-structured materials) through the creation of oxygen vacancies in the lattice. The oxygen sub-stoichiometry determines the oxygen exchange capacity, thus determining the fuel production output per mass of redox-active material. This paper provides an overview of the most advanced cycles involving ZnO/Zn, SnO2/SnO, Fe3O4/FeO, ferrites, ceria, and perovskites redox systems by focusing on their ability to perform H2O and CO2 splitting during two-step thermochemical cycles with high fuel production yields, rapid reaction rates, and performance stability. Furthermore, the possible routes for redox-active material integration and processing in various solar reactor technologies are also described.

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Domínguez, Joaquín R., Teresa González, Patricia Palo et Eduardo M. Cuerda-Correa. « Advanced photochemical oxidation of emergent micropollutants : Carbamazepine ». Journal of Environmental Science and Health, Part A 49, n^o 9 (5 mai 2014) : 988–97. http://dx.doi.org/10.1080/10934529.2014.894840.

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I. Litter, Marta, et Natalia Quici. « Photochemical Advanced Oxidation Processes for Water and Wastewater Treatment ». Recent Patents on Engineering 4, n^o 3 (1 novembre 2010) : 217–41. http://dx.doi.org/10.2174/187221210794578574.

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Glaze, William H., Fernando Beltran, Tuula Tuhkanen et Joon-Wun Kang. « Chemical Models of Advanced Oxidation Processes ». Water Quality Research Journal 27, n^o 1 (1 février 1992) : 23–42. http://dx.doi.org/10.2166/wqrj.1992.002.

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Abstract Advanced oxidation processes (AOPs) have been defined as near-ambient temperature processes that involve the generation of highly reactive radical intermediates, especially the hydroxyl radical. These processes show promise for the destruction of hazardous organic substances in municipal and industrial wastes, in drinking water and in ultrapure water. Three types of AOPs are considered in this paper: catalyzed decomposition of ozone; ozone with hydrogen peroxide (Peroxone); and photolysis of hydrogen peroxide with ultraviolet radiation. Kinetic models for these processes are being developed based on known chemical and photochemical principles. The models take into account measured effects of radical scavengers such as bicarbonate; dose ratios of the oxidants or UV intensity; pH; and the presence of generic radical scavengers. The models are used to discuss two cases: oxidation of parts-per-million levels of nitrobenzene with ozone, Peroxone and peroxide/UV and oxidation of naphthalene and pentachlorophenol with peroxide/UV.

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Arslan, Idil, Işil Akmehmet Balcioğlu et Tuula Tuhkanen. « Treatability of simulated reactive dye‐bath wastewater by photochemical and non‐photochemical advanced oxidation processes ». Journal of Environmental Science and Health, Part A 35, n^o 5 (mai 2000) : 775–93. http://dx.doi.org/10.1080/10934520009377002.

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Bach, Altai, Grigory Zelmanov et Raphael Semiat. « Wastewater mineralization using advanced oxidation process ». Desalination and Water Treatment 6, n^o 1-3 (juin 2009) : 152–59. http://dx.doi.org/10.5004/dwt.2009.661.

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Prasetyaningrum, Aji, Teguh Riyanto, Mohamad Djaeni et Widayat Widayat. « Photochemical Oxidation Process of Copper from Electroplating Wastewater : Process Performance and Kinetic Study ». Processes 8, n^o 10 (12 octobre 2020) : 1276. http://dx.doi.org/10.3390/pr8101276.

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An investigation of the process of ozone combined with ultraviolet radiation has been carried out in order to establish the kinetics for photochemical oxidation of copper (Cu) from electroplating wastewater. The effects of operating parameters, including initial Cu concentration, ozone dosage, UV irradiation intensity, and pH value on the photochemical oxidation of Cu have been studied comprehensively. The Cu concentration during the reaction was identified using atomic absorption spectroscopy (AAS) method. The solid product was analyzed using X-ray diffraction (XRD) and scanning electron microscope–energy-dispersive X-ray (SEM–EDX) methods. It was found that the UV-Ozone process has high performance on Cu removal compared to UV and Ozone processes due to the high production rate of HO• radicals. It was also found that the solid product from the UV-Ozone process was CuO monoclinic crystal phase. The initial Cu concentration, ozone dosage, and pH value were significantly affected the Cu removal efficiency. On the other hand, the UV irradiation intensity was not significant; however, it has responsibility in promoting the ozone photolysis. The kinetics model for the photochemical oxidation of Cu was established following the first-order kinetic model. Furthermore, the reaction mechanism was also developed.

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de la Fuente, Luciana, Tatiana Acosta, Paola Babay, Gustavo Curutchet, Roberto Candal et Marta I. Litter. « Degradation of Nonylphenol Ethoxylate-9 (NPE-9) by Photochemical Advanced Oxidation Technologies ». Industrial & ; Engineering Chemistry Research 49, n^o 15 (4 août 2010) : 6909–15. http://dx.doi.org/10.1021/ie901785j.

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Akyol, Abdurrahman, Orhan Taner Can et Mahmut Bayramoglu. « Treatment of hydroquinone by photochemical oxidation and electrocoagulation combined process ». Journal of Water Process Engineering 8 (décembre 2015) : 45–54. http://dx.doi.org/10.1016/j.jwpe.2015.09.001.

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Muruganandham, M. « Photochemical oxidation of reactive azo dye with UV–H2O2 process ». Dyes and Pigments 62, n^o 3 (septembre 2004) : 269–75. http://dx.doi.org/10.1016/j.dyepig.2003.12.006.

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Gottselig, Steven M., Sadie L. Dunn-Horrocks, Kristy S. Woodring, Craig D. Coufal et Tri Duong. « Advanced oxidation process sanitization of eggshell surfaces ». Poultry Science 95, n^o 6 (juin 2016) : 1356–62. http://dx.doi.org/10.3382/ps/pev450.

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Renita, A. Annam, S. Sai Bhargav et Evin Joy. « Advanced Oxidation Process by Electro-Fenton Reagent ». Advanced Materials Research 984-985 (juillet 2014) : 159–63. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.159.

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This paper deals with the advanced oxidation using Electro-fenton reagent for the degradation of azo-dyes in textile effluents. Discharge of textile effluents causes inevitable pollution of water resources which calls for further treatment methods. In this experiment, textile effluent samples were treated with iron electrodes with the reagents, hydrogen peroxide and ferrous sulfate .The acid dye effluents which were used in this study are Acid Orange 7, Acid Red 88, and Acid Violet 7. The temperature was set to 40° C. Samples of 20 ml were analyzed for Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Colour reduction. Experiments were carried out at voltage variations of 2, 4, 6 and 8 volts. From the results, COD and Colour were observed to be reduced drastically from respective original values before treatment with Fenton’s reagent using electro-chemical method.Keywords--- Advanced oxidation, Electro-fenton, BOD, COD, Colour reduction

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Pillai, Suresh C., Niall B. McGuinness, Ciara Byrne, Changseok Han, Jacob Lalley, Mallikarjuna Nadagouda, Polycarpos Falaras et al. « Photocatalysis as an effective advanced oxidation process ». Water Intelligence Online 16 (15 mai 2017) : 333–81. http://dx.doi.org/10.2166/9781780407197_0333.

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Swaim, Paul D., Rory Morgan, Paul Mueller, Mary Vorissis, Ufuk Erdal et William Carter. « Implementing an Effective UV Advanced Oxidation Process ». Proceedings of the Water Environment Federation 2009, n^o 1 (1 janvier 2009) : 678–88. http://dx.doi.org/10.2175/193864709793847555.

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Symons, James M., et Kevin L. Worley. « An advanced oxidation process for DBP control ». Journal - American Water Works Association 87, n^o 11 (novembre 1995) : 66–75. http://dx.doi.org/10.1002/j.1551-8833.1995.tb06452.x.

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