Relevant bibliographies by topics / Water – Purification – Oxidation

Academic literature on the topic 'Water – Purification – Oxidation'

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Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Water – Purification – Oxidation"

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Tan, Feng Xun, Fei Wang, Dao Ji Wu, and Xiao Xiang Cheng. "Development of Network Pressure-Superposed Secondary Water Purification." Applied Mechanics and Materials 587-589 (July 2014): 606–11. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.606.

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Secondary water supply equipment was designed based on the current water supply source and municipal pipe network. The combination between Water purification and pressure-superposed water supply could guarantee the drinking water security, fully exploit the municipal pipe network pressure, and effectively save the energy. Catalytic oxidation of ozone, complex adsorption, and microbial degradation collaborated to treat the micro-polluted water. Activated alumina was employed for the high fluoride water purification with HCl/NaOH deep regeneration. For the brackish water, membrane treatment was adopted. A collaborative technology of ozone oxidation, contact oxidation, and biological oxidation was used for the iron/manganese-rich water. The results showed that all the effluents could meet the requirement of "Sanitary standard for drinking water" (GB5749-2006) and "Water quality standards for fine drinking water" (CJ94-2005).
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Fleming, R. W., and D. W. Tedder. "Water purification by radiation induced oxidation (thesis excerpts)." Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology 25, no. 4 (May 1990): 425–46. http://dx.doi.org/10.1080/10934529009375568.

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Al-Maznai, H., and B. E. Conway. "Auto-inhibition effects in anodic oxidation of phenols for electrochemical waste-water purification." Journal of the Serbian Chemical Society 66, no. 11-12 (2001): 765–84. http://dx.doi.org/10.2298/jsc0112765a.

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Removal or modification of noxious organic impurities in waste-waters is a major challenge for environmental science. Pollutants such as phenols and their derivatives, as well as PCBs, have attracted special attention. In recent years, the possibilities of effecting direct electrocatalytic oxidations at high-area electrodes such as supported Pt or RuO2 have been investigated. However, in a number of cases, especially with phenolic impurities, application of anodic oxidation fails to lead to continuous Faradaic oxidation currents owing to the electrode surfaces becoming blocked with polymeric oxidation products leading to auto-inhibition (?passivation?) of the desired electrode process. Examples of such effects with phenols and related compounds are examined comparatively in the present paper by means of cyclic volatammetry and chronoamperometry.
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Li, Fa Zhan, Dong Cheng, and Xi Wu Lv. "Experimental Study of Ultrafiltration of Eutrophicated Source Water in Combination with Sand Filter and Biological Contact Oxidation." Applied Mechanics and Materials 238 (November 2012): 409–13. http://dx.doi.org/10.4028/www.scientific.net/amm.238.409.

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The experiments of ultrafiltration of Taihu Lake water with sand filter and water- dropping aeration biological contact oxidation combinations were evaluated. The experiment results showed that under the conditions of the average water temperature was 19.8°C and the HRT of the biological contact oxidation was 1.5h, the removal rates of turbidity, ammonia nitrogen, CODMn and algae by technological purification process were 99.1%, 85.2%, 53.6% and 98.7% respectively. As a comparison, the removal rates of turbidity, ammonia nitrogen, CODMn, algae, UV254 by routine purification process respectively were 96.6%, 16.3%, 35.8% and 95.5% separately in Wuxi Chongshan waterworks at the same water temperature. Under the conditions of approximately equivalent in investment and running expenditure by technological and economical analyses, the efficiency of technological purification process was higher than that of routine purification process.
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Karki, Bhishma, Jeevan Jyoti Nakarmi, and Mukesh Jerambhai Keshavani. "Water Purification from Organic Pollutants using a Photo-Oxidation." Research Journal of Applied Sciences 14, no. 6 (October 20, 2019): 192–97. http://dx.doi.org/10.36478/rjasci.2019.192.197.

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Andreozzi, R. "Advanced oxidation processes (AOP) for water purification and recovery." Catalysis Today 53, no. 1 (October 15, 1999): 51–59. http://dx.doi.org/10.1016/s0920-5861(99)00102-9.

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Arakcheev, E. N., V. E. Brunman, M. V. Brunman, A. V. Konyashin, V. A. Dyachenko, A. P. Petkova, and R. Ye Nekrasov. "EXPERIMENTAL SUBSTANTIATION OF THE PRACTICABILITY OF DISINFECTION AND PURIFICATION OF WATER AND WASTEWATERS WITH POTASSIUM FERRATE." Hygiene and sanitation 96, no. 3 (March 27, 2019): 216–22. http://dx.doi.org/10.18821/0016-9900-2017-96-3-216-222.

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There are considered issues of the use of potassium ferrate for disinfection of drinking water, oxidation and coagulation of wastewaters, rainwater and environmental waters. Variety of realizations of technology for different water disinfection and purification using potassium ferrate is proved. Principles of composition and operation of technological flowchart of potassium ferrate producing and dosing and structural solution of complex unit for flowchart’s realization are analyzed and proved. Ecological and economic efficiencies of developed technology compared to analogs are shown. The results of approbation of the usage of electrolytic potassium ferrate for drinking water disinfection, wastewater oxidation and coagulation, including toxic, rain and environmental waters, are presented.
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Heponiemi, Anne, Janne Pesonen, Tao Hu, and Ulla Lassi. "Alkali-Activated Materials as Catalysts for Water Purification." Catalysts 11, no. 6 (May 23, 2021): 664. http://dx.doi.org/10.3390/catal11060664.

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In this study, novel and cost-effective alkali-activated materials (AAMs) for catalytic applications were developed by using an industrial side stream, i.e., blast furnace slag (BFS). AAMs can be prepared from aluminosilicate precursors under mild conditions (room temperature using non-hazardous chemicals). AAMs were synthesized by mixing BFS and a 50 wt % sodium hydroxide (NaOH) solution at different BFS/NaOH ratios. The pastes were poured into molds, followed by consolidation at 20 or 60 °C. As the active metal, Fe was impregnated into the prepared AAMs by ion exchange. The prepared materials were examined as catalysts for the catalytic wet peroxide oxidation (CWPO) of a bisphenol A (BPA) aqueous solution. As-prepared AAMs exhibited a moderate surface area and mesoporous structure, and they exhibited moderate activity for the CWPO of BPA, while the iron ion-exchanged, BFS-based catalyst (Fe/BFS30-60) exhibited the maximum removal of BPA (50%) during 3 h of oxidation at pH 3.5 at 70 °C. Therefore, these new, inexpensive, AAM-based catalysts could be interesting alternatives for catalytic wastewater treatment applications.
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Lazarova, Z., and R. Spendlingwimmer. "Treatment of yellow water by membrane separations and advanced oxidation methods." Water Science and Technology 58, no. 2 (August 1, 2008): 419–26. http://dx.doi.org/10.2166/wst.2008.667.

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Comparative experimental study is performed on purification of yellow wastewaters separated and collected in solarCity, Linz, Austria. Three membrane methods (micro-, ultra-, and nano-filtration), and two advanced oxidations (gamma radiation and electrochemical oxidation) were applied. Best results concerning the removal of pharmaceuticals and hormones from urine by membrane separation were achieved using the membrane NF-200 (FilmTecTM). Pharmaceuticals (ibuprofen and diclofenac), and hormones (oestrone, β-oestradiol, ethenyloestradiol, oestriol) were removed completely from urine. NF-separation also has some disadvantages: losses of urea, and lowering the conductivity in the product (permeate). The retentates (concentrates) received have to be treated further by oxidation to destroy the “problem” compounds. The results showed that electrochemical oxidation is more suitable than gamma radiation. Gamma-radiation with intensities higher than 10 kGy has to be applied for efficiently destroying of ibuprofen, and especially diclofenac. A high quantity of intermediate “problem” substances with oestrone structure was formed during the gamma oxidation of hormone containing urine samples. The electrochemical oxidation can be successfully applied for elimination of pharmaceuticals such as diclofenac, and hormones (oestrone, β-oestradiol) from yellow wastewater without loss of urea (nitrogen fertiliser).
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Povarov, Vladimir, Igor' Gusev, Sergey Rosnovsky, Dmitriy Statsura, Vladimir Kazansky, Evgeniy Goncharov, Eduard Mel'nikov, et al. "Experience in Implementation of Systems Applied for Drainage Water Ion-Selective Purification from Radionuclides at Units 1,2 of Novovoronezh-2 NPP." ANRI, no. 4 (December 3, 2020): 64–70. http://dx.doi.org/10.37414/2075-1338-2020-103-4-64-70.

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The article is dedicated to the assessment of the experience in drainage water purification from radionuclides using ion-selective purification method on Units 1,2 Novovoronezh-2 NPP. Application of an ion-selective sorbent based on nickel ferrocyanide, as well as the preliminary oxidation of corrosive origin radiongjuclides, allow to achieve a satisfactory quality of purification from Cs-134, Cs-137, Co-60, Co 58, Mn-54, Cr-51. However, this method turned out to be ineffective for drainage water purification from Be-7, Sb-124, Sb-125. The article presents a possible method for drainage water purification from Be-7, Sb-124, Sb-125 using an iron-based coagulant, prospects for the modernization of the ion-selective drainage water purification plant, as well as plans to improve methods for drainage water purification at Novovoronezh-2 NPP
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Dissertations / Theses on the topic "Water – Purification – Oxidation"

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Lam, Chun-wai Ringo, and 林俊偉. "Development of photocatalytic oxidation technology for purification ofair and water." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38572382.

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Bach, Altai. "Water purification by advanced oxidation processes using nano particles." Online version, 2010. http://dds.crl.edu/CRLdelivery.asp?tid=13238.

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Wong, Kit Iong. "Chemical removal of dichloromethane (DCM) from contaminated water using advanced oxidation processes (AOPs) :Hydrogen Peroxide Ozone UV." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3868740.

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Conley, LuAnne Simpson. "Removal of complexed iron by chemical oxidation and/or alum coagulation." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03172010-020643/.

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Kapinga, Sarah Kasangana. "Organic binder mediated Co3O4/TiO2 heterojunction formation for heterogeneous activation of Peroxymonosulfate." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2811.

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Thesis (Master of Engineering in Chemical Engineering)--Cape Peninsula University of Technology, 2019.
A shortage of water has resulted in the need to enhance the quality of wastewater that is released into the environment. The advanced oxidation process (AOP) using heterogeneous catalysis is a promising treatment process for the management of wastewater containing recalcitrant pollutants as compared to conventional processes. As AOP is a reliable wastewater treatment process, it is expected to be a sustainable answer to the shortage of clean water. AOP using heterogeneous catalysis based on Co3O4 particles and PMS, in particular has been found to be a powerful procedure for the degradation and mineralization of recalcitrant organic contaminants. In addition, due to the growing application of Co3O4 in lithium batteries, large quantities of these particles will be recovered as waste from spent lithium batteries, so there is a need to find a use for them. Although this method has received some promising feedback, challenges still need to be addressed, such as the toxicity of cobalt particles, the poor chemical and thermal stability and particle aggregation, and the prompting of lower catalytic efficiency in long haul application. Furthermore, the removal of the catalyst after the treatment of pollutants is also an issue. In order to be applicable, a novel catalyst must be produced requiring the combination of Co3O4 with a support material in order to inhibit cobalt leaching and generate better particle stability. From the available literature, TiO2 was found to be the best support material because it not only provides a large surface area for well dispersed Co3O4, but it also forms strong Co-O-Ti bonds which greatly reduced cobalt leaching as compared to other support materials. Moreover, it also greatly encourages the formation of surface Co–OH complexes, which is considered a crucial step for PMS activation. Therefore, the issues cited above could be avoided by producing a Co3O4/TiO2 heterojunction catalyst.
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Salama, Philippe. "Photocatalytic oxidation of NiEDTA." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103292.

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Metal-Ethylenediaminetetraacetic acid (EDTA) complexes are found in a variety of industrial process. The stability of the formed complexes makes these compounds often inert to conventional wastewater treatment systems. In this work, the photocatalytic oxidation of NiEDTA was investigated as a means of breaking up the chelated nickel. The studied variables included the light intensity rate, the catalyst (TiO2), oxygen and NiEDTA concentrations. Photocatalytic experiments showed that increasing the catalyst concentration (0.5-3.0 g/L) decreases the light penetration inside the reactor resulting in a decrease in the reaction rate. The effect of oxygen and NiEDTA concentration was shown to exhibit Langmuir-Hinshelwood type kinetics. Total organic carbon (TOC) did not show any significant mineralization of NiEDTA for all investigated conditions. As a result, the by-products of the reaction were measured and found to include ED3A (ethylenediaminetriacetic acid), N-N'-EDDA (ethylenediamindiaacetic acid), IDA (iminodiacetic acid), oxalic acid, oxamic acid, glyoxylic acid, formaldehyde, ammonia, nitrate and nitrite. ED3A was found to be the major by-product of the reaction and nitrogen added from NiEDTA was found to be released as ammonia nitrogen. Oxygen consumption experiments were demonstrated as an effective way to monitor the rate of the reaction through measurement of the electron oxygen utilization rate. Nickel precipitation experiments showed that some of the by-products of NiEDTA degradation formed complexes with nickel. Finally, a light distribution model was generated using a CFD software (Fluent 6.1.22). For the catalyst concentration range of 0.5 to 3.0 g/L, this model showed that all of the light energy supplied by a centered UV lamp is absorbed within a one centimeter distance. Using the local volumetric rate of energy absorption (LVREA) calculated from the model the rate of the reaction was expressed in terms of quantum yield. For experiments carried out with air the quantum yield showed that the degradation rate was limited from an insufficient oxygen supply for electron scavenging. Increasing the oxygen concentration to 0.60 mmole O2/L increased the quantum yield for the highest light intensity rate; however the quantum yield never reached an optimum value thus indicating that other limiting conditions exist.
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Lam, Chun-wai Ringo. "Development of photocatalytic oxidation technology for purification of air and water." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38572382.

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Botfield, Andrew Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Kinetic modelling studies of As(III) oxidation in dark pH 3 and 8 Fenton - mediated and pH 8 Cu(II) - H2O2 systems." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2006. http://handle.unsw.edu.au/1959.4/31969.

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In this thesis, a combination of laboratory experimentation under well defined conditions coupled with a kinetic modelling approach is used to verify the existence and respective kinetic rates of previously unconfirmed or postulated mechanisms that drive and limit dark Fenton (Fe(II)/H2O2) - mediated As(III) oxidation at pH 3 and 8 and dark Cu(II) - H2O2 - mediated As(III) oxidation at pH 8. Dark Fenton - mediated oxidation of As(III) at pH 3 is first examined and the effects of the variation in the concentration of reactants (As(III), Fe(II) and H2O2), oxygen, phosphate and organics (2 - propanol, formate, and citrate) are reported and analysed. The kinetic models developed for these systems show high applicability to full scale water treatment application and key mechanistic findings include the significance of the cycling of Fe(II) / Fe(III) via HO2 ???/O2 ??????, the effects of As(IV) termination reactions in the absence of oxygen and the retarding effects of phosphate due to the postulated formation of a Fe(III) - phosphate complex (at a derived rate constant of 2.2 x 106 M-1s-1, that also appears to have negligible kinetic activity in terms of reduction to Fe(II) by HO2 ???/O2 ??????). The work also demonstrates the significance of the free radical by products of formate and citrate oxidation by ???OH (HCOO???/CO2 ?????? and 3HGA???2???). The examination of the dark Cu(II) - H2O2 - mediated oxidation of As(III) at pH 8 with variation in the concentration of reactants (As(III), Fe(II) and H2O2), carbonate and organics (2 - propanol, formate and citrate) demonstrated for the first time the high applicability of this system to the pre - oxidation of As(III) in water treatment and mechanistically that ???OH and CO3 ?????? are the dominant As(III) oxidants in this system. The As(III) oxidant CO3 ??????, is suggested to be generated by the interaction of ???OH and O2 ?????? with the carbonate matrix, at the respective rate constants of 4.9 x 107 M-1s-1 and 5.5 x 106 M-1s-1. Examination of the dark Fenton - mediated oxidation of As(III) at pH 8 and the effects of variation in the concentration of reactants (As(III), Fe(II) and H2O2), carbonate, organics (2 - propanol, formate and citrate) and Cu(II) demonstrates the varied potential mechanistic pathways in relation to the generation of As(III) oxidants from the Fenton reaction, Fe(II) + H2O2 such as Fe(IV) and CO3 ?????? and the previously dismissed ???OH, due to the presence of Fe(II) - citrate complexes. This work also demonstrates and models the enhancement of As(III) oxidation in the presence of an additional transitional metal ion, Cu(II).
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Dodd, Michael. "Chemical oxidation of aquatic antibiotic microcontaminants by free and combined chlorine." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/21502.

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Law, Cheuk Fung Japhet. "Catalytic advanced oxidation processes for degradation of environmental emerging contaminants." HKBU Institutional Repository, 2019. https://repository.hkbu.edu.hk/etd_oa/610.

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In recent years, the increasing release of trace organic chemicals to the aquatic environment have been problematic to both the ecosystem and the human society. These trace organic chemicals, regarded as emerging contaminants, include different categories of chemicals, which are either deemed to be safe for human consumption or they are naturally occurring compounds. As a newly recognized class of emerging contaminant, artificial sweeteners are proven to be one of the most ubiquitous classes of emerging contaminants in environmental waters. Its transformation to different suite of TPs during water treatment processes generated more toxic influence than the parent compound is problematic. The realization of the widespread of emerging contaminants, together with their ambiguous fate and impact to the environment have led to the development of advanced oxidation processes that can effectively attenuate this wide range of contaminants. In this work, several catalytic advanced oxidation processes were studied. On one hand, it aimed to evaluate their effectiveness on the removal of the artificial sweetener - acesulfame; and on the other hand, to shed lights on the future development of catalytic advanced oxidation processes. In the first part of this thesis, the photo-Fenton treatment was evaluated on its potential to effectively remove acesulfame together with the produced transformation products, and the post-treatment toxicity screening. The photo-Fenton treatment was found to be effective in removing both the parent compound and the transformation products, without leading to an increase in toxicity, which is largely related to the effective removal of the transformation products. In attempt to reduce the reliance on UV irradiation, newly synthesized carbon and nitrogen co-doped TiO2-based photocatalyst was applied to capture the simulated sunlight for the degradation of acesulfame. The heterogenous photocatalytic treatment was found to involve several different oxidative reactive species for both degradation and transformation by using several scavengers to alter the degradation profile. Unexpected transformation product was also formed upon treatment in actual water matrix, suggesting the impact of water constituents to the transformation of emerging contaminants. Toxicity results indicated the inability to achieve detoxification, suggesting that a more effective degradation process was needed. To accelerate the degradation process, and enhance the performance at neutral pH, the use of redox mediators for Fenton/Fenton-like system was evaluated. Developed novel Fenton-like system involving copper(II) as transition metal ion, persulfate as oxidant and mercaptosuccinic acid as redox mediator led to effective removal of different contaminants. Elucidation of the proposed oxidation mechanism suggested the role of each components of the system, and the generation of different reactive species for degradation as indicated by the different acesulfame transformation profile obtained. The implementation of redox mediators to Fenton/Fenton-like system was beneficial and an effective approach. In short, this work presents several kinds of catalytic advanced oxidation process and shed lights on improving the degradation performance with directions for the future development of better and more effective water treatment processes.
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Books on the topic "Water – Purification – Oxidation"

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Wilmanns, Eric Günter. Supercritical water oxidation of volatile acids. Austin, Tex: Center for Research in Water Resources, Bureau of Engineering Research, University of Texas at Austin, 1990.

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Photodegradation of water pollutants. Boca Raton: CRC Press, 1996.

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Photochemical purification of water and air. Weinheim: Wiley-VCH, 2003.

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Brandhuber, Philip. Methods for the detection of residual concentations of hydrogen peroxide in advanced oxidation processes. Alexandria, VA: WateReuse Foundation, 2009.

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Frank, Phyllis. Arsenic (III) oxidation and removal from drinking water. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1986.

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Cooper, William J. Reaction rates and mechanisms of advanced oxidation processes (AOP) for water reuse. Alexandria, VA: WateReuse Foundation, 2010.

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Rosario-Ortiz, Fernando L. Optimization of advanced oxidation processes for water reuse: Effect of effluent organic matter on organic contaminant removal. Alexandria, VA: WateReuse Research Foundation, 2011.

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Lowry, Jerry. Arsenite oxidation by solid phase media or a UV sulfite process. Denver, CO: AWWA Research Foundation and American Water Works Association, 2005.

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Gupta, S. K. Sen. Trace organic removal by photochemical oxidation. Chalk River, Ont: Chalk River Laboratories, 1995.

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Boegel, Joan V. Selenium oxidation and removal by ion exchange. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1986.

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Book chapters on the topic "Water – Purification – Oxidation"

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CHAPMAN, THOMAS W. "TREATMENT OF COMPLEX SYSTEMS ADVANCED OXIDATION PROCESSES." In Water Purification and Management, 1–23. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9775-0_5.

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Brenner, Asher, and Aharon Abeliovich. "Water Purification: Algae in Wastewater Oxidation Ponds." In Handbook of Microalgal Culture, 595–601. Oxford, UK: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118567166.ch31.

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Liang, Robert, Anming Hu, Mélisa Hatat-Fraile, and Norman Zhou. "Fundamentals on Adsorption, Membrane Filtration, and Advanced Oxidation Processes for Water Treatment." In Nanotechnology for Water Treatment and Purification, 1–45. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06578-6_1.

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Dai, Chu, Xike Tian, Chao Yang, Yulun Nie, and Yanxin Wang. "Application of Heterogeneous Nanocatalysis-Based Advanced Oxidation Processes in Water Purification." In Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 1–47. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-11155-7_64-2.

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Dai, Chu, Xike Tian, Chao Yang, Yulun Nie, and Yanxin Wang. "Application of Heterogeneous Nanocatalysis-Based Advanced Oxidation Processes in Water Purification." In Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 2941–87. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-36268-3_64.

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Khan, Sanaullah, Murtaza Sayed, M. Sohail, Luqman Ali Shah, and Mazhar Ali Raja. "Advanced Oxidation and Reduction Processes." In Advances in Water Purification Techniques, 135–64. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-814790-0.00006-5.

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Linden, K. G., and M. Mohseni. "Advanced Oxidation Processes: Applications in Drinking Water Treatment." In Comprehensive Water Quality and Purification, 148–72. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-382182-9.00031-1.

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Bennedsen, Lars R. "In situ Chemical Oxidation." In Chemistry of Advanced Environmental Purification Processes of Water, 13–74. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-444-53178-0.00002-x.

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Søgaard, Erik G., and Daniel Anobaah Ankrah. "Advanced Iron Oxidation at Drinking Water Treatment Plants." In Chemistry of Advanced Environmental Purification Processes of Water, 249–83. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-444-53178-0.00007-9.

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Muff, Jens. "Electrochemical Oxidation – A Versatile Technique for Aqueous Organic Contaminant Degradation." In Chemistry of Advanced Environmental Purification Processes of Water, 75–134. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-444-53178-0.00003-1.

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Conference papers on the topic "Water – Purification – Oxidation"

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Hutagalung, Sutrisno Salomo, Imamul Muchlis, Pius Sebleku, M. Faizal Amri, Hanif Fakhrurroja, and Arjon Turnip. "Water purification technology based advanced oxidation processes emerging ozone." In 2014 IEEE 2nd International Conference on Technology, Informatics, Management, Engineering & Environment (TIME-E). IEEE, 2014. http://dx.doi.org/10.1109/time-e.2014.7011634.

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Ning Wang, Ngai Yui Chan, Chap Hang To, Furui Tan, and Xuming Zhang. "Photocatalytic microreactors for water purification: Selective control of oxidation pathways." In 2013 8th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2013. http://dx.doi.org/10.1109/nems.2013.6559753.

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Benkafada, Faouzia, Djahida Kerdoud, and Ali Bouchoucha. "Anodic oxidation of commercially pure titanium for purification of polluted water." In TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES18. Author(s), 2018. http://dx.doi.org/10.1063/1.5039226.

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Mahmoud, Sawsan A., A. Abdel Aal, and Ahmed K. Aboul-Gheit. "Nanocrystalline ZnO Thin Film for Photocatalytic Purification of Water." In ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials International Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/mn2008-47034.

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A thin film ZnO nanostructured catalyst exhibited a significantly greater superiority for the photodegradation of 2, 4, 6-TCP in water over photolysis via irradiation with UV of 254 nm wavelength. This ZnO photocatalyst was prepared via Zn metal evaporation and deposition on a glass sheet followed by calcination ature from 350 to 500 °C and the calcination time from 1 to 2h shows via SEM photography a decrease of ZnO nanoparticales sizes sheet followed by calcination (oxidation). Increasing the calcination temperature from 350 to 500 °C and the calcination time from 1 to 2h shows via SEM photography a decrease of ZnO nanoparticales sizes as well as the shape of their crystals finer needles, for which the crystallinity enhances as revealed by XRD. 2, 4, 6-Trichlorophenol was used as a model pollutant in water. Its photolysis using UV only or photocatalysis using UV irradiation in presence of the ZnO thin film catalyst indicated aromatic intermediates, which suffered of Cl by OH, addition of OH in a bare carbon in the aromatic ring, whereas in Photocatalysis deeper oxidation products, e.g., quinones and hydroquinones were also formed.
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Ghanem, Hussam, Volodymyr Kravchenko, Vladislav Makedon, Oleksii Shulha, and Suprun Oleksandr. "Preliminary Water Purification from Surfactants and Organic Compounds through Ozone Oxidation, Intensified by Electrical Impulses." In 2019 IEEE 6th International Conference on Energy Smart Systems (ESS). IEEE, 2019. http://dx.doi.org/10.1109/ess.2019.8764235.

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Sánchez, Daniel, Miguel Paez, Rocío Sierra, and Gerardo Gordillo. "Waste Tire Rubber Gasification Using Air Steam for Partial Oxidation and N2 as Carrier Gas." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95383.

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The high calorific value of rubber in waste tires (RWT) and its composition, similar to that of coal, make it a promising resource for thermal treatment. This paper assesses the potential of RWT for the production of syngas through thermal gasification using air and steam as oxidizing agents. Subsequent purification of the obtained syngas and its conversion to ammonia were also evaluated. The analysis started by grinding RWT samples and submitting them to thermogravimetric analysis (TGA), ultimate analysis (UA) and proximate analyses (PA). Through TGA data, a pyrolysis Activation Energy of 110.5 KJ mol−1 was determined using isoconversional methods. The results from UA and PA were used to estimate empirical formulae, high heating value (HHV), and formation enthalpy. These data were entered in the simulation package ASPEN Plus® where a sensitivity analysis was carried out using the following models: RGibbs (for equilibrium reactions) and Non-Random Two Liquids (NRTL) coupled with UNIFAC for phase equilibrium calculations. As a result, the effects of equivalence ratio (ER) and steam to fuel ratio (W:F) on adiabatic temperature, gas composition, and energy recovery were determined. It was shown that W:F lower than 0.6 should be used, since the additional water shifted equilibrium towards oxidation of syngas components. Additionally, an ER range from 3.0 to 5.5 should be selected due to the presence of maximum values for both concentration and syngas output molar flow. Optimal operation conditions were estimated around an ER of 4.0 and a W:F of 0.5. Further simulation considered purification of the gas stream from gasification and its conversion to pure sulfur and ammonia. The purification plant, a selexol-based SOx and COx absorption, produced two streams: gas and liquid. The gas stream (containing mainly H2, CO, traces of produced hydrocarbons, some CO2 and N2 from air) entered a Water Gas Shift (WGS) unit. The liquid stream (containing the solvent that carries H2S, CO2 and SO2) was distilled to recover selexol. The gas resulting from this distillation, was entered to a Catalytic Claus reactor to recover elemental sulfur. As a result, 16.6 kg h−1 of pure sulfur (which constitutes approximately 88% of the sulfur pollutants in RWT) was recovered. The N2-H2 mixture exiting the WGS was fed to a Haber Botch where 1552 kg h−1 of ammonia were obtained from an initial 1250 kg h−1 RWT feed. This study was concluded with a cost analysis which led to calculate a cost of 0.19 USD$/MT of ammonia produced through this innovative route that uses RWT rubber as feedstock.
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Akbari, M. H., S. A. Asaee, and R. Roohi. "Modeling of a Micro-Channel Water-Gas Shift Reactor." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30241.

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Hydrogen purification through water-gas shift (WGS) is a favored option in fuel processing for hydrogen fuel cells. A three-dimensional single channel model is developed to simulate the behavior of a water-gas shift micro reactor. The flow regime is assumed to be steady and laminar; furthermore, it is presumed that the walls are isothermal. A water-gas shift reaction rate model is utilized to simulate the surface reaction on Pt/TiO2 catalyst. The gas feed composition is taken as the efflux of a typical auto-thermal reforming (ATR) reactor. A parametric study is conducted to investigate the effect of gas feed temperature, gas space velocity and channel length on water-gas shift micro reactor performance. The study resulted in an optimum water-gas shift micro reactor design. It should be noted that a water-gas shift micro reactor is an essential part of a reactor train to remove carbon monoxide from a hydrogen rich mixture. Such a mixture can be used as fuel for a PEM fuel cell in portable devices. The results of these simulations revealed that the optimum reactor consists of a square cross section channel with 100 μm hydraulic diameter, 20 mm length, space velocity of 1000 h−1 and gas feed temperature of 270°C. The carbon monoxide mole fraction in the efflux is in a range suitable for a typical preferential oxidation (PROX) reactor.
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Avramenko, Valentin, Vitaly Dobrzhansky, Dmitry Marinin, Valentin Sergienko, and Sergey Shmatko. "Novel Technology for Hydrothermal Treatment of NPP Evaporator Concentrates." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7093.

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A novel technology was developed for treatment of evaporator concentrates produced as a result of operation of evaporation devices comprising the main component of special water purification systems of nuclear power plants (NPP). The developed technology includes a hydrothermal (T = 250–300°C and P = 80–120 bar) processing of evaporator concentrates in oxidation medium in order to destruct stable organic complexes of cobalt radionuclides and remove these radionuclides by oxide materials formed during such a processing. The cesium radionuclides contained in evaporator concentrates are removed by a conventional method — through application of one of the developed composite sorbents with ferrocyanides of transition metals used as active agents. Extensive laboratory studies of the processes occurring in evaporator concentrates under hydrothermal conditions were performed. It was shown that hydrothermal oxidation of evaporator concentrates has a number of advantages as compared to traditional oxidation methods (ozonation, photocatalytic, electrochemical and plasma oxidation). A laboratory installation was built for the flow-type hydrothermal oxidation of NPP evaporator concentrates. The obtained experimental results showed good prospects for the developed method application. On the basis of the results obtained, a pilot installation of productivity up to 15 l/hour was developed and built in order to work out the technology of evaporator concentrates hydrothermal treatment. The pilot tests of the hydrothermal technology for evaporator concentrates hydrothermal treatment were performed for 6 months in 2006 at the 1st reactor unit of the Novovoronezhskaya NPP (Voronezh Region, Russia). Optimal technological regimes were determined, and estimations of the economic soundness of the technology were made. The advantages of the presented technology in terms of management of concentrated liquid radioactive wastes (LRW) at nuclear cycle facilities, as compared to other methods applicable for this type of LRW, were demonstrated. Application of the hydrothermal technology in the system of NPP LRW management enables one to reduce substantially the volume of solid radioactive waste sent for final disposal.
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Korsgaard, Anders Risum, Mads Pagh Nielsen, Mads Bang, and So̸ren Knudsen Kær. "Modeling of CO Influence in PBI Electrolyte PEM Fuel Cells." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97214.

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In most PEM fuel cell MEA’s Nafion is used as electrolyte material due to its excellent proton conductivity at low temperatures. However, Nafion needs to be fully hydrated in order to conduct protons. This means that the cell temperature cannot surpass the boiling temperature of water and further this poses great challenges regarding water management in the cells. When operating fuel cell stacks on reformate gas, carbon monoxide (CO) content in the gas is unavoidable. The highest tolerable amount of CO is between 50–100 ppm with CO-tolerant catalysts. To achieve such low CO-concentration, extensive gas purification is necessary; typically shift reactors and preferential oxidation. The surface adsorption and desorption is strongly dependent upon the cell temperature. Higher temperature operation favors the CO-desorption and increases cell performance due to faster kinetics. High temperature polymer electrolyte fuel cells with PBI polymer electrolytes rather than Nafion can be operated at temperatures between 120–200°C. At such conditions, several percent CO in the gas is tolerable depending on the cell temperature. System complexity in the case of reformate operation is greatly reduced increasing the overall system performance since shift reactors and preferential oxidation can be left out. PBI-based MEA’s have proven long durability. The manufacturer PEMEAS have verified lifetimes above 25,000 hours. They are thus serious contenders to Nafion based fuel cell MEA’s. This paper provides a novel experimentally verified model of the CO sorption processes in PEM fuel cells with PBI membranes. The model uses a mechanistic approach to characterize the CO adsorption and desorption kinetics. A simplified model, describing cathode overpotential, was included to model the overall cell potential. Experimental tests were performed with CO-levels ranging from 0.1% to 10% and temperatures from 160–200°C. Both pure hydrogen as well as a reformate gas models were derived and the modeling results are in excellent agreement with the experiments.
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Zhang, Min, Fu-Yi Cui, and Dong-Mei Liu. "The Research on Removing Cyclops of Zooplankton in Raw Water by Purification Process Combined with Pre-Oxidations." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163660.

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