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Готові списки джерел за темами / Powder or granular activated carbon

Добірка наукової літератури з теми "Powder or granular activated carbon"

Автор: Grafiati

Опубліковано: 8 червня 2024

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Статті в журналах з теми "Powder or granular activated carbon":

1

Hassan, Suhad Majed, and Bushra Suhale Albusoda. "Mitigation of collapse characteristics of gypseous soils by activated carbon, sodium metasilicate, and cement dust: An experimental study." Journal of the Mechanical Behavior of Materials 31, no. 1 (January 1, 2022): 631–38. http://dx.doi.org/10.1515/jmbm-2022-0065.

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Abstract This study includes adding chemicals to gypseous soil to improve its collapse characteristics. The collapse behavior of gypseous soil brought from the north of Iraq (Salah El-Deen governorate) with a gypsum content of 59% was investigated using five types of additions (cement dust, powder sodium meta-silicate, powder activated carbon, sodium silicate solution, and granular activated carbon). The soil was mixed by weight with cement dust (10, 20, and 30%), powder sodium meta-silicate (6%), powder activated carbon (10%), sodium silicate solution (3, 6, and 9%), and granular activated carbon (5, 10, and 15%). The collapse potential is reduced by 86, 71, 43, 37, and 35% when 30% cement dust, 6% powder sodium meta-silicate, 10% powder activated carbon, 6% sodium silicate solution, and 10% granular activated carbon are used, respectively.

2

Guergazi, Saâdia, and Mohamed Mahdi Missaoui. "Incidence of the Presence of Lead on the Elimination of Humic Substances." Key Engineering Materials 723 (December 2016): 645–49. http://dx.doi.org/10.4028/www.scientific.net/kem.723.645.

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The main objective of our work is to test the performance of powder activated carbon (PAC) and granular activated carbon (GAC) in the retention of humic substances in the presence of lead. The adsorption tests conducted in synthetic solutions of distilled water. The results showed that, the removal efficiency of humic substances varies with the agitation time was obtained maximum efficiency after 180 minutes for PAC and 300 for the GAC. However, on granular activated carbon (GAC) recorded an improvement in the removal of humic substances in the order of 1.60%. The reaction rate is the same for the activated carbon powder (PAC). By against, for the GAC the removal rate of humic substances in the presence of lead is slower. A comparison between our results with the absorption of humic substances without the presence of lead showed that the elimination of humic substances (10 mg/l) in the presence of lead (5mg/l) on powder activated carbon (1 g/L) is disturbed. The removal efficiencies decrease with the increase on the pH of medium in an interval ranging from 2 to 12.The variation of the mass of lead has recorded an inhibiting role in the adsorption of humic substances for both activated carbons.

3

Yang, Kun, and John T. Fox. "Adsorption of Humic Acid by Acid-Modified Granular Activated Carbon and Powder Activated Carbon." Journal of Environmental Engineering 144, no. 10 (October 2018): 04018104. http://dx.doi.org/10.1061/(asce)ee.1943-7870.0001390.

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4

Khalaf Erabee, Iqbal, and Saleem M. Ethaib. "Performane of Activated Carbon Adsorption in Removing of Organic Pollutants from River Water." International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 356. http://dx.doi.org/10.14419/ijet.v7i4.20.26134.

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This study presents a water treatment process by using a down-flow fixed bed activated carbon contractor model. Two types of activated carbon (AC) used, powder and granular activated carbon from date pits as a raw material, the parameters tested are biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solid (TSS), total dissolved solid (TDS) and pH. The column diameter and bed depths are made constant, whereas the size of activated carbon is varies. The obtained removal efficiencies for sample of river water are 39.8% of BOD, 41.8% of COD, 81.8% of TSS and 67.7% of TDS for granular AC. For powdered AC the removal efficiencies of parameters are 34.7% of BOD, 17.6% of COD, 72.7% of TSS and 50% of TDS. The granular AC made from date pits is the best activated carbon because of low cost of raw material and it is widely applied for usage in the water or wastewater treatment, as it is very effective in terms of cost and performance to cater the increasing demand of clean water.

5

Song, Yang, Fang Wang, Fredrick Orori Kengara, Yongrong Bian, Xinglun Yang, Chenggang Gu, Mao Ye, and Xin Jiang. "Does powder and granular activated carbon perform equally in immobilizing chlorobenzenes in soil?" Environmental Science: Processes & Impacts 17, no. 1 (2015): 74–80. http://dx.doi.org/10.1039/c4em00486h.

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The objective of this study is to compare the efficacies of powder activated carbon (PAC) and granular activated carbon (GAC) as amendments for the immobilization of volatile compounds in soil. Soil artificially-spiked with chlorobenzenes (CBs) was amended with either PAC or GAC to obtain an application rate of 1%.

6

Aktaş, Ö., and F. Çeçen. "Adsorption reversibility and bioregeneration of activated carbon in the treatment of phenol." Water Science and Technology 55, no. 10 (May 1, 2007): 237–44. http://dx.doi.org/10.2166/wst.2007.327.

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This study aims to clarify the effect of adsorbability, desorbability, biodegradability and activated carbon type on the extent of bioregeneration in the treatment of phenol. For this purpose, four different activated carbon types; one thermally activated and one chemically activated powdered carbon (PAC), and their granular countertypes (GAC) with similar physical characteristics were used. Adsorption isotherms showed that the thermally activated carbons, either in powdered or granular form, were better adsorbers for phenol than the chemically activated ones. However, adsorption was more irreversible in the case of thermally activated carbons. Bioregeneration of chemically activated carbons were found to be higher in accordance with their higher reversibility of adsorption showing that bioregeneration was controlled by the reversibility of adsorption. Bioregeneration efficiencies for the thermally activated carbons were much higher than their efficiencies of total desorbability. This indicated that some exoenzymatic reactions might have occurred so that phenol was bioregenerated more than expected.

7

Vu, Kim Long, Vitaly N. Klushin, Alexey V. Nistratov, Hoang Thi Tho, and Tran Thi Bich Ngoc. "Improving the properties of activated carbons based on organoplastics by chemical activation with potassium hydroxide (KOH)." Butlerov Communications 60, no. 10 (October 31, 2019): 99–109. http://dx.doi.org/10.37952/roi-jbc-01/19-60-10-99.

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The possibility of processing wastes based on organoplastics generated at aviation enterprises into activated carbons by chemical activation using potassium hydroxide has been investigated. Powdered and granular activated carbons with a porous structure, characterized by the predominance of micropores or mesopores, are obtained that are superior in many respects to both adsorbents based on organoplastics and most industrial active carbons. The specific surface area of micropores of the obtained granular activated carbons is 1716 m2/g, the absorption capacity is 365 mg/g for methylene blue and 1180 mg/g for iodine. The obtained granular activated carbons are characterized by a stable adsorption value of n-butanol (about 400 mg/g) during three successive adsorption-regeneration cycles. Desorption at 120±5 °C provides an almost complete restoration of the activity of this absorber, fundamentally allowing its multiple use in this technology. It is shown in the work that granular activated carbons of very high quality can be obtained by chemical activation with potassium hydroxide based on organoplastics wastes, the only drawback of which is, in essence, the relatively low (at 60%) abrasion resistance. The possibility of improving the quality properties of granular activated carbons by adding a small amount of carbon fiber (1% of the mass) as a reinforcing component in the process of granulation to raw paste was investigated. The specified method can significantly increase the strength of the granules in compression (about 3 times), while the adsorption properties of activated carbon are practically unchanged. The properties described above allow us to conclude that the obtained granular activated carbon is effective and highly competitive.

8

Liu, Wei, and Sabit Adanur. "Desulfurization Properties of Activated Carbon Fibers." Journal of Engineered Fibers and Fabrics 9, no. 2 (June 2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900208.

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Activated carbon fibers (ACFs) are one of the most promising adsorbents due to their outstanding properties, such as more exposed adsorption surface, narrower pore size distribution, fast adsorption rate and flexibility, in comparison with granular activated carbon and activated carbon powder. In this work, ACFs manufactured from various raw materials were studied and their pore structures and sulfur dioxide removal performance under dry and humid conditions were investigated. From the ACFs studied in this paper, larger surface area was found correspond to higher total pore volume and larger DA micropore diameter. In dry air, breakthrough capacity of ACFs with sulfur dioxide was found to be proportionately dependent on micropore ratio and pore size distribution. Although powdered activated carbon (PAC) showed higher breakthrough capacity, its adsorption rate was slower than ACFs due to the difference of the pore structure. The presence of water vapor in the air stream greatly increased SO2 adsorption capacities of ACFs but affected their utilization differently.

9

binti Jamion, Nurul’ Ain, and Siti Mazleena binti Mohamed. "Characterization of Activated Carbon from Sugar Cane Husk." Applied Mechanics and Materials 699 (November 2014): 1006–11. http://dx.doi.org/10.4028/www.scientific.net/amm.699.1006.

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Interface adsorption of gases and liquid on a clean solid surface could be due to the physical or chemical adsorption. In this study, the activated carbon was prepared from sugar cane husk (powder and granular form) using phosphoric acid (H3PO4) as activating agent. Sample was activated at 500°C for two hours in the furnace and washed using vacuum method. Besides, surface area of activated carbon was defined using Single Point Brunauer-Emmett-Teller (BET) Nitrogen Gas. The physico-chemical characteristics of the prepared activated carbon were characterized by Fourier-Transformed Infrared Spectroscopy (FTIR), gravimetric method, and Field Emission Scanning Electron Microscopy (FESEM). The adsorption study by surfactants, namely CTAB (cationic) and TX-100 (non-ionic) were investigated. The experimental results showed that a good activated carbon was prepared from sugar cane husk granular (SCH-G) gave the highest BET surface area of 860.18 m2/g and the adsorption capacity of SCH-G activated carbon at 25°C using TX-100 (205.81 mg g-1) was greater compared to the CTAB (108.20 mg g-1). This study has shown that the sugar cane husk was a good activated carbon and has potential to be used as adsorbent for the removal of surfactants from aqueous solutions.

10

Gül, Ş., O. Eren, Ş. Kır, and Y. Önal. "A comparison of different activated carbon performances on catalytic ozonation of a model azo reactive dye." Water Science and Technology 66, no. 1 (July 1, 2012): 179–84. http://dx.doi.org/10.2166/wst.2012.103.

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The objective of this study is to compare the performances of catalytic ozonation processes of two activated carbons prepared from olive stone (ACOS) and apricot stone (ACAS) with commercial ones (granular activated carbon-GAC and powder activated carbon-PAC) in degradation of reactive azo dye (Reactive Red 195). The optimum conditions (solution pH and amount of catalyst) were investigated by using absorbencies at 532, 220 and 280 nm wavelengths. Pore properties of the activated carbon (AC) such as BET surface area, pore volume, pore size distribution, and pore diameter were characterized by N2 adsorption. The highest BET surface area carbon (1,275 m2/g) was obtained from ACOS with a particle size of 2.29 nm. After 2 min of catalytic ozonation, decolorization performances of ACOS and ACAS (90.4 and 91.3%, respectively) were better than that of GAC and PAC (84.6 and 81.2%, respectively). Experimental results showed that production of porous ACs with high surface area from olive and apricot stones is feasible in Turkey.

Більше джерел

Дисертації з теми "Powder or granular activated carbon":

1

Kårelid, Victor. "Towards application of activated carbon treatment for pharmaceutical removal in municipal wastewater." Licentiate thesis, KTH, Industriell bioteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196862.

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Many pharmaceuticals are found in municipal wastewater effluents due to their persistence in the human body as well as in conventional wastewater treatment processes. This discharge to the environment can lead to adverse effects in aquatic species, such as feminization of male fish. During the past decade, these findings have spawned investigations and research into suitable treatment technologies that could severely limit the discharge. Adsorption onto activated carbon has been identified as one of the two main technologies for implementation of (future) full-scale treatment. Recent research has put a closer focus on adsorption with powdered activated carbon (PAC) than on granular activated carbon (GAC). Studies where both methods are compared in parallel operation are thus still scarce and such evaluation in pilot-scale was therefore a primary objective of this thesis. Furthermore, recirculation of PAC can be used to optimize the treatment regarding the carbon consumption. Such a setup was evaluated as a separate treatment stage to comply with Swedish wastewater convention. Additionally, variation of a set of process parameters was evaluated. During successive operation at three different wastewater treatment plants an overall pharmaceutical removal of 95% could consistently be achieved with both methods. Furthermore, treatment with GAC was sensitive to a degraded effluent quality, which severely reduced the hydraulic capacity. Both treatment methods showed efficient removal of previously highlighted substances, such as carbamazepine and diclofenac, however in general a lower adsorption capacity was observed for GAC. By varying the input of process parameters, such as the continuously added dose or the contact time, during PAC treatment, a responsive change of the pharmaceutical removal could be achieved. The work in this thesis contributes some valuable field experience towards wider application of these treatment technologies in full-scale.

QC 20161124

MistraPharma

2

DIAS, Albiane Carvalho. "Lodos ativados com adi??o de carv?o ativado no tratamento combinado de lixiviado de aterro sanit?rio e esgoto dom?stico." Universidade Federal Rural do Rio de Janeiro, 2017. https://tede.ufrrj.br/jspui/handle/jspui/1919.

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Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-07-26T18:05:15Z No. of bitstreams: 1 2017 - Albiane Carvalho Dias.pdf: 1710937 bytes, checksum: 54d2634d67d97d4c119e2aa8507ca99b (MD5)
Made available in DSpace on 2017-07-26T18:05:15Z (GMT). No. of bitstreams: 1 2017 - Albiane Carvalho Dias.pdf: 1710937 bytes, checksum: 54d2634d67d97d4c119e2aa8507ca99b (MD5) Previous issue date: 2017-02-23
CAPES
The inappropriate management of leachate can cause negative environmental impacts, in order to compromise the availability and quality of natural resources, reason of to their complex composition and high polluter potential. One of the alternatives for the treatment of landfill leachate is its combined treatment with domestic sewage in sewage treatment plants, although higher proportions of the leachate in the sewage could compromise the efficiency of the process. This study aimed to evaluate the efficiency of the combined treatment of landfill leachate and domestic sewage in biomass and activated carbon systems. For this, were used sequential batch reactors in lab-scale and two types of activated carbon - granular (GAC) and pulverized (PAC). The work consisted of two stages, among them they are: the tests where the reactors were fed with different mixtures of leachate/synthetic sewage (0, 2, 5 e 10%) and concentrations of GAC (0, 2, 4 e 6 g/L) operating with residence times 23h and sludge ages 28 days; and tests where the reactors were fed with a mixture of 5% leachate/sewage; fixed a PAC concentration of 6 g/L and were operated on with differents HRT of 23, 16 and 8 hours and sludge ages of 28, 28, and 17 days, respectively. It has been evaluated, the difference between the two types of carbon regarding COD removal efficiency, in the following configurations: fixing the concentration of carbono (6 g/L) and the percentage of leachate in the feed (5% v/v), for the batch time of 23 h and sludge age of 28 d. For the first step, it was possible to verify that the COD removal efficiency was higher in the reactors containing GAC and biomass when comparedes to the reactor containing only biomass. And along this stage of the experiment it was possible to observe that after the increase of leachate concentration in the feed there was a significant drop in COD removal efficiency. In the evaluation of the PACT? process, it was verified that the reactor with HRT of 23 h was the one that presented the best COD and color removal efficiencies the process, 79 and 44%, respectively. In the comparative tests between the two types of carbon, the PAC system proved to be much more efficient in the removal of COD, presenting an average efficiency of 79% when compared to the GAC system (63%).
O gerenciamento inadequado do lixiviado pode causar impactos ambientais negativos, de forma a comprometer a disponibilidade e qualidade dos recursos naturais, devido sua composi??o complexa e seu elevado potencial poluidor. Uma das alternativas para o tratamento de lixiviado de aterros sanit?rios ? o seu tratamento combinado com esgoto dom?stico em esta??es de tratamento de esgoto, embora propor??es mais elevadas do lixiviado no esgoto possam comprometer a efici?ncia do processo. Este trabalho teve por objetivo avaliar a efici?ncia do tratamento combinado de lixiviado de aterro sanit?rio e esgoto dom?stico em sistemas com biomassa e carv?o ativado. Para isto, foram utilizados reatores em batelada sequencial em escala de laborat?rio e dois tipos de carv?o ativado- granular (CAG) e pulverizado (CAP). O trabalho foi constitu?do de duas etapas, dentre elas est?o: os ensaios onde os reatores foram alimentados com diferentes misturas de lixiviado/esgoto sint?tico (0, 2, 5 e 10%) e concentra??es de CAG (0, 2, 4 e 6 g/L) operando com tempos de resid?ncia de 23 h e idades do lodo de 28 dias; e ensaios onde os reatores foram alimentados com uma mistura de 5% de lixiviado/esgoto, fixado uma concentra??o de CAP de 6 g/L e foram operados com diferentes tempos de resid?ncia de 23, 16 e 8 horas e idades de lodo de 28, 28, e 17 dias, respectivamente. Avaliou-se, ainda, a diferen?a entre os dois tipos de carv?o quanto ? efici?ncia de remo??o de DQO, nas seguintes configura??es: fixando a concentra??o de carv?o (6 g/L) e o percentual de lixiviado na alimenta??o (5% v/v), para o tempo de batelada de 23 h e idade do lodo de 28 d. Para a primeira etapa, foi poss?vel verificar que a efici?ncia de remo??o de DQO foi superior nos reatores contendo CAG e biomassa quando comparados ao reator contendo apenas biomassa. E ao longo desta etapa do experimento foi poss?vel observar que ap?s o aumento da concentra??o de lixiviado na alimenta??o houve queda significativa na efici?ncia de remo??o de DQO. Na avalia??o do processo PACT?, verificou-se que o reator com tempo de resid?ncia de 23 h foi o que apresentou as melhores efici?ncias de remo??o de DQO e cor do processo, 79 e 44%, respectivamente. Nos testes comparativos entre os dois tipos de carv?o, o sistema com CAP mostrou-se muito mais eficiente na remo??o de DQO, apresentando efici?ncia m?dia de 79%, quando comparado ao sistema com CAG (63%).

3

Hatt, Juliette W. "Pretreatment options for municipal wastewater reuse using membrane technology." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/10200.

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Increasing freshwater scarcity across the world means that wastewater reclamation is being considered as a key method in which to meet the growing demand. Evolution of water reuse schemes where high quality product is required such as for indirect potable reuse has led to the adoption in recent years of the integrated membrane scheme using a combination of microfiltration or ultrafiltration with reverse osmosis membrane. However, despite technological advancements, these membranes are still prone to fouling resulting in increased costs through cleaning or replacement. This thesis aims to look at pretreatment to reduce the fouling propensity of the microfiltration membranes via a 600m3 /d pilot plant which was commissioned to investigate indirect potable reuse. A range of pretreatments including pre-screening, pre-coagulation, powdered activated carbon and granular activated carbon were assessed based on fouling amelioration, water quality improvement and cost analysis. Results showed that ferric sulphate dosing was the most effective in terms of reducing the reversible fouling rate especially at high turbidity loads enabling higher flux to be realised leading to a small cost benefit. Activated carbon proved the most effective pretreatment in terms of organic removal and a significant reduction in the irreversible fouling rate. However, the cost involved in using this as a pretreatment is significant compared to possible cost savings through reduced requirement for chemical cleaning. This pretreatment is only viable if it obviates the need for a separate organic removal process.

4

Karimi-Jashni, Ayoub. "Electrochemical reactivation of granular activated carbon." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6200.

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The main objectives of this dissertation were to refine electrochemical GAC reactivation technology, a promising alternative technology, and to investigate its technical feasibility. The specific objectives of the study were: (1) to evaluate alternative reactor designs; (2) to assess the effect of contaminant and GAC types on the regeneration efficiency; (3) to study the electrolyte post-treatment; and (4) to investigate reactivation mechanisms and model them. To achieve these objectives many interrelated topics were investigated using phenol, 2-nitrophenol (2NP) and naturally occurring background organic matter (NOM) as adsorbates and Filtrasorb 400 (F-400), Westvaco Carbon (WV-B), Darco Norit, and Filtrasorb 300 (F-300) as adsorbents. The impact of reactor operation conditions (reactivation time, current density, pH) on the reactivation efficiency showed that the reactivation efficiency (RE%) could be increased to a maximum by increasing the current and/or time. It was concluded that electrochemical reactivation of GAC is contaminant-type dependent. The reactivation efficiencies of F-400 loaded with 2NP and phenol at different reactivation currents and times showed similar patterns. A comparison of the percent reactivation of GACs showed that F-400 and WV-B performed essentially the same for the tested conditions. Total destruction of desorbed contaminants and their by-products were possible. Desorbed phenol and 2NP from loaded GAC react to form a number of reaction by-products that are eventually oxidized to CO2 and H 2O. The main mechanism responsible for electrochemical reactivation is high-pH induced desorption at the cathode. It accounts for approximately 50--60% of the total reactivation of a single layer of GAC. It is recommended that the GAC electrochemical reactivation should be a three step process. First, the GAC is reactivated with a relatively low current to minimize potential alterations of the GAC surface. Second, the GAC is drained and rinsed with a buffered solution. Finally, the electrolyte is treated electrochemically for an extended time at a much higher current (and possibly a different electrode) to reduce the electrolyte's TOC so that it may be reused or discharged. (Abstract shortened by UMI.)

5

Cen, Jianqi. "Electrochemical regeneration of granular activated carbon." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/6754.

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Laboratory experiments have investigated the feasibility of granular activated carbon (GAC) regeneration via an electrochemical technique. GAC was loaded with phenol by batch adsorption tests, electrochemically regenerated and finally reloaded with phenol. Regeneration was conducted by placing GAC on a platinum elecotrode within a batch reactor filled with electrolyte (generally a 1% NaCl solution), and applying a current to the reactor. Limited experiments show that cathodic regeneration is more efficient than anodic regeneration; the investigation concentrates on the former. Although anodic regeneration is more efficient in destroying residual phenol in the electrolyte, cathodic regeneration can also eliminate these residuals by using longer regeneration times and/or higher currents. Increasing the regeneration current and time could increase the regeneration efficiency (RE) up to 94 percent. Lower currents applied for longer regeneration times yield similar results with slightly lower energy consumption. REs are also significantly affected by the electrolyte type, electrolyte concentration, and GAC particle size, but not by the carbon loading. Multiple regenerations only reduced the REs by an additional 2 percent per cycle. Preliminary analysis indicates that electrochemical regeneration is less expensive than thermal regeneration as it has no obvious carbon losses. Since this electrochemical regeneration process is technologically feasible and probably more economical than thermal regeneration, it merits further investigation.

6

Leyva-Ramos, Roberto, Raul Ocampo-Perez, Oliva L. Torres-Rivera, Maria S. Berber-Mendoza, and Nahum A. Medellin-Castillo. "Kinetics of pyridine adsorption onto granular activated carbon." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191056.

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7

Leyva-Ramos, Roberto, Raul Ocampo-Perez, Oliva L. Torres-Rivera, Maria S. Berber-Mendoza, and Nahum A. Medellin-Castillo. "Kinetics of pyridine adsorption onto granular activated carbon." Diffusion fundamentals 11 (2009) 83, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14054.

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8

Lissaneddine, Amina. "Formulation d’adsorbant à base de matériaux naturels et leurs combinaisons au procédé électrochimique pour traiter des effluents industriels." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0296.

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Les procédés d’extraction d’huile d’olive génèrent d’énormes quantités de déchets solides (grignons d’olive) et liquides (margines) pendant la saison de l’extraction de l’huile d’olives, généralement entre novembre et mars. Ces déchets représentent un grand défi pour les producteurs d'huile d'olive car ils doivent trouver des solutions techniques, environnementales et économiques pour gérer ces sous-produits. L'objectif principal de cette thèse était d'explorer et de proposer un cycle complet de traitement des déchets de l’extraction de l’huile d’olives. Cette démarche s'inscrit dans le cadre d'une approche zéro rejet liquide et déchets et promeut le concept d'économie circulaire. Deux adsorbants basés sur l'activation chimique des grignons d'olive, c'est-à-dire du charbon actif en poudre incorporé au sein de billes d'alginate composite et du charbon actif en grains (CAG), ont été synthétisés avec succès. Les deux matériaux avaient une structure et une morphologie poreuse qui ont révélé leur faisabilité en tant que bio-adsorbants potentiels et peu coûteux. Ils ont été utilisés en adsorption ou électrosorption pour la récupération des composés phénoliques (CPs) des margines. L'adsorption des CPs correspond à la cinétique de second ordre (R2 = 0.997) et aux isothermes de Langmuir (R2 = 0.995). Les paramètres thermodynamiques pour l'adsorption des CPs sur le bio-adsorbant suggèrent une nature spontanée de l'adsorption, une réaction endothermique et une modification de la surface du bio-adsorbant pendant le processus d'adsorption. Le modèle de Thomas a mieux prédit l'adsorption sur colonne de CPs (R2 =0.97). Enfin, l'étude de la régénération du bio-adsorbant a montré que la récupération des phénols à partir des margines peut être effectuée avec de l'éthanol (43% des CPs récupérés) ou de l'acide chlorhydrique (90% des CPs récupérés). Les résultats de la caractérisation électrochimique des deux électrodes de bio-adsorbant ont montré que la surface électro-active élevée, la valeur élevée de l'intensité du courant d'échange (I0) et la faible valeur de la résistance de transfert de charge (RCT) pourraient être des propriétés prometteuses pour les études d'électrosorption. L'électrosorption a amélioré la capacité d'adsorption des billes composites de 123 à 170 mg g-1 et le taux d'élimination des CPs de 66 à 74% pour le CAG. De plus, l'électrosorption de composés organiques a été démontrée pour la première fois avec des eaux usées réelles. De nouveaux modèles ont été développés pour mieux comprendre et prédire la cinétique d'électrosorption des CPs, y compris le transport de masse transitoire. Les composés organiques restants dans les margines ont ensuite été éliminés (91 % de la demande chimique en oxygène (DCO) éliminée) par un traitement d'électro-oxydation avancé, tandis que le bio-adsorbant a été régénéré (34,5 % des CPs récupérés) par une méthode électrochimique
Olive mill technology generates a considerable amount of solid (olive pomace) and liquid (olive mill wastewater) by-products during olives milling season, usually between November and March. These wastes represent a great challenge for olive oil producers since they must find technical, environmental and economical solutions to manage these by-products. The main objective of this thesis was to explore and propose a complete cycle of olive mill wastes treatment. This is in the framework of a zero liquid and waste discharge approach and promotes the circular economy concept. Two sorbents based on olive pomace chemical activation, i.e., powdered activated carbon within composite alginate beads and granular activated carbon (GAC), were successfully synthetized. Both materials had a structure and a porous morphology that revealed their feasibilities as potential and low-cost bio-sorbents. They were employed in either adsorption or electrosorption for phenolic compounds (PCs) recovery from olive mill wastewater (OMWW). The adsorption of PCs fitted second-order kinetics (R2 = 0.997) and Langmuir isotherms (R2 = 0.995). The thermodynamic parameters for the PCs adsorption onto the bio-adsorbent suggested a spontaneous nature of adsorption, an endothermic reaction and a modification of bio-adsorbent surface during the adsorption process. Thomas's model was better at predicting PCs column adsorption (R2 =0.97). Finally, the investigation of bio-adsorbent regeneration showed that the recovery of phenols from OMWW could be carried out with ethanol (43% of PCs recovered) or hydrochloric acid (90% of PCs recovered). The results of electrochemical characterization of the two bio-adsorbent electrodes showed that the high electroactive surface area, the high value of exchange current intensity (I0) and the low value of charge transfer resistance (RCT) could be promising properties for electrosorption studies. Electrosorption improved the adsorption capacity of the composite beads from 123 to 170 mg g-1 and the removal rate of PCs from 66 to 74% for GAC. Furthermore, the electrosorption of organic compounds was shown for the first time with real wastewater. New models were developed to better understand and predict PCs electrosorption kinetics, including transient mass transport. The remaining organic compounds in OMWW were then eliminated (91 % of chemical oxygen demand (COD) removed) by advanced electro-oxidation treatment, while the bio-adsorbent was regenerated (34.5% of PCs recovered) by an electrochemical method

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Reddy, Reddy Pratyusha. "Comparative Study of Adsorption of Dyes onto Activated Carbon and Modified Activated Carbon by Chitosan Impregnation." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1525171939645615.

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Carbo, Patricia. "Colour and manganese removal in primary granular activated carbon filtration." Thesis, University of Leeds, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392574.

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Книги з теми "Powder or granular activated carbon":

1

Groeber, Margaret M. Granular activated carbon treatment. Washington, DC: U.S. Environmental Protection Agency, Office of Emergency and Remedial Response, 1991.

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Groeber, Margaret M. Granular activated carbon treatment. Washington, DC: U.S. Environmental Protection Agency, Office of Emergency and Remedial Response, 1991.

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3

Jahangir, Mohammad Abdul Quadir. Bioregeneration of granular activated carbon. Birmingham: University of Birmingham, 1994.

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4

Association, American Water Works, ed. Organics removal by granular activated carbon. Denver, CO: American Water Works Association, 1989.

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5

Clark, Robert Maurice. Granular activated carbon: Design, operation, and cost. Chelsea, Mich: Lewis Publishers, 1989.

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6

Xie, Yuefeng F. Haloacetic acid removal using granular activated carbon. Denver, CO: Awwa Research Foundation, 2004.

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7

W, Lykins Ben, and Risk Reduction Engineering Laboratory (U.S.), eds. Granular activated carbon adsorption with on-site infrared furnace reactivation: Project summary. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1989.

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8

Scholz, Miklas. Optimisation of biological activity in granular activated carbon beds. Birmingham: University of Birmingham, 1997.

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9

Koffskey, Wayne E. Alternative disinfectants and granular activated carbon effects on trace organic contaminants. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1987.

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10

Koffskey, Wayne E. Alternative disinfectants and granular activated carbon effects on trace organic contaminants. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1987.

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Частини книг з теми "Powder or granular activated carbon":

1

Hung, Yung-Tse, Howard H. Lo, Lawrence K. Wang, Jerry R. Taricska, and Kathleen Hung Li. "Granular Activated Carbon Adsorption." In Physicochemical Treatment Processes, 573–633. Totowa, NJ: Humana Press, 2005. http://dx.doi.org/10.1385/1-59259-820-x:573.

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2

Churchill, Jack G., and Kathryn A. Mumford. "Granular Activated Carbon in Water Treatment." In Pure and Functionalized Carbon Based Nanomaterials, 298–325. Boca Raton : CRC Press, Taylor and Francis Group, [2020] | “CRC Press is an imprint of the Taylor & Francis Group, an informa business.”: CRC Press, 2020. http://dx.doi.org/10.1201/9781351032308-13.

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3

Liu, Z. M., and L. J. Sun. "Rheological behavior evaluation of activated carbon powder modified asphalt." In Advances in Functional Pavements, 106–10. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003387374-21.

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4

De Las Casas, C. L., K. G. Bishop, L. M. Bercik, M. Johnson, M. Potzler, W. P. Ela, A. E. Sáez, S. G. Huling, and R. G. Arnold. "In-Place Regeneration of Granular Activated Carbon Using Fenton's Reagents." In ACS Symposium Series, 43–65. Washington, DC: American Chemical Society, 2006. http://dx.doi.org/10.1021/bk-2006-0940.ch004.

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5

Weber, Walter J., and Edward H. Smith. "Effects of Humic Background on Granular Activated Carbon Treatment Efficiency." In Advances in Chemistry, 501–32. Washington, DC: American Chemical Society, 1988. http://dx.doi.org/10.1021/ba-1988-0219.ch030.

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6

Valentin, Jan, George Karráa, Jan Suda, Jakub Šedina, Pavel Tesárek, and Zdeněk Prošek. "Potentials for Using Mechanically Activated Concrete Powder in Stabilized Granular Pavement Mixtures." In Advancement in the Design and Performance of Sustainable Asphalt Pavements, 203–20. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61908-8_15.

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Vishnuganth, M. A., Mathava Kumar, and N. Selvaraju. "Granular Activated Carbon Supported Titanium Dioxide Photocatalytic Process for Carbofuran Removal." In Recent Advances in Chemical Engineering, 195–201. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1633-2_21.

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Lier, W. C. "The Use of Granular Activated Carbon for Potable Water Treatment as an Example of Liquid Phase Applications of Activated Carbon." In Adsorption: Science and Technology, 399–417. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2263-1_21.

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Mocho, Pierre, and Pierre Cloirec. "Regeneration by Induction Heating of Granular Activated Carbon Loaded with Volatile Organic Compounds." In Environmental Technologies and Trends, 124–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59235-5_9.

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Miller, Jennifer, Vernon L. Snoeyink, and Joop Kruithof. "The Reduction of Bromate by Granular Activated Carbon in Distilled and Natural Waters." In Water Disinfection and Natural Organic Matter, 251–81. Washington, DC: American Chemical Society, 1996. http://dx.doi.org/10.1021/bk-1996-0649.ch015.

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Тези доповідей конференцій з теми "Powder or granular activated carbon":

1

Matsumoto, Yoshitaka, Shion Arima, Takahiro Watari, Toru Miwa, Kazunori Ebata, and Takashi Yamaguchi. "Denitrification of groundwater by methanogenic granular sludge: Effect of activated carbon addition." In 24TH TOPICAL CONFERENCE ON RADIO-FREQUENCY POWER IN PLASMAS. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0122050.

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2

RAVANCHI, MARYAM TAKHT, and TAHEREH KAGHAZCHI. "WATER TREATMENT SYSTEM USING GRANULAR ACTIVATED CARBON BED." In Proceedings of the 4th International Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702623_0079.

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3

Oretsky, Zachary L., Daniel Lehrmann, and Geary M. Schindel. "REPRODUCIBILITY OF GRANULAR ACTIVATED CARBON FOR DYE TRACER DETECTION." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-301979.

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4

Park, J., and C. Lungu. "43. Granular Activated Carbon Adsorption Of Tolueneethanol Binary Mixtures." In AIHce 2004. AIHA, 2004. http://dx.doi.org/10.3320/1.2758429.

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Lu, Jiongyuan, and Sanfan Wang. "Ultrasonic Regeneration of Granular Activated Carbon Used in Water Treatment." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5516459.

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Ilavský, Ján, Danka Barloková, and Ondrej Kapusta. "Removal of Humic Substances in Water by Granular Activated Carbon." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.078.

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The basic characteristics of humic substances and their negative influence on water quality and its treatment are described. The paper presents the results of removing humic substances from water from the Hriňová (Slovakia) water reservoir with the addition of humic substances using granular activated carbon (GAC) from two producers (Chemviron, Cabot) at three different pH levels of water. The results of static experiments involving the removal efficiency of humic substances using TOC parameters and the instantaneous water adsorption capacity, which uses materials at the contact time of the water with GAC material, was calculated. The results show that the pH of the water had no significant effect on the change in the efficiency of removing humic substances from water. A high level of efficiency (50%) and the lowest value of TOC are obtained at a pH of 6.5. The GAC adsorption capacity of humic substances, depending on the contact time with the water, ranged from 0.17 mg/g for one hour to 0.56 mg/g for eight hours of contact time. The most effective material was Filtrasorb F400.

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Li, Bing, Liqiang Zhang, Zhiqiang Wang, and Chunyuan Ma. "NO Adsorption over Powder Activated Carbon in a Fluidized Bed." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748823.

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ALDEGUER, ALEJANDRO, IRENE SENTANA, PEDRO VARO, and DANIEL PRATS. "TREATMENT OF PESTICIDES PRESENT IN WATER BY POWDER ACTIVATED CARBON." In WATER RESOURCES MANAGEMENT 2019. Southampton UK: WIT Press, 2019. http://dx.doi.org/10.2495/wrm190091.

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Qu, Yan, Chaojie Zhang, Qi Zhou, Qiuju Li, Huaichen Wang, Haiyan Ni, and Wenjing Liu. "Adsorption Mechanism of Perfluorooctane Sulfonate on Granular Activated Carbon in Wastewater." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517682.

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Huang, Liu-ya, Zhi-dong Yang, Bing-jing Li, Juan Hu, Wei Zhang, and Wei-chi Ying. "Granular Activated Carbon Adsorption Treatment for Removal of Trichloroethylene from Groundwater." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517862.

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Звіти організацій з теми "Powder or granular activated carbon":

1

Parker, Kent E., Elizabeth C. Golovich, and Dawn M. Wellman. Uranium Adsorption on Granular Activated Carbon – Batch Testing. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1127293.

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2

Lutes, Christopher C., Trent Henderson, David S. Liles, Daniel Garcia, Renee Clayton, Judodine Patterson, Robert Parette, Frederick S. Cannon, Mark Goltz, and Daniel Craig. Tailored Granular Activated Carbon Treatment of Perchlorate in Drinking Water. Fort Belvoir, VA: Defense Technical Information Center, October 2010. http://dx.doi.org/10.21236/ada579136.

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3

Tarpley, Danielle, and David Perkey. Impacts of Granular Activated Carbon (GAC) on erosion behavior of muddy sediment. Engineer Research and Development Center (U.S.), July 2022. http://dx.doi.org/10.21079/11681/44841.

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Recent policy changes regarding the placement of dredged material have encouraged the USACE to increase its beneficial use (BU) of the sediments dredged from the nation’s navigation channels. A good portion of this material is fine grained (<63 μm), which traditionally has limited use in BU applications, in part due to its dispersive nature. A need exists to evaluate the potential of stabilizing and using fine-grained sediment (FGS) in BU projects. Previous studies have shown the addition of granular sand to FGS reduces the mobility of the bed. The potential of using Granular Activated Carbon (GAC), an amendment commonly used in environmental capping involving FGS, as a similar bed stabilizing material was explored in this study. A series of laboratory erosion tests using Sedflume were performed on FGS-GAC mixtures that ranged from 5% to 20% GAC by mass. Results suggested that GAC content ≤10% had no influence on the stability of the bed while GAC content ≥15% appeared to reduce both critical shear stress (τcr) and erosion rate (n). However, when compared to control cores, those without GAC, clear evidence of bed stabilization of FGS from the addition of GAC was not observed.

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Henderson, Trent, and Fred Cannon. Tailored Granular Activated Carbon Treatment of Perchlorate in Drinking Water. ESTCP Cost and Performance Report. Fort Belvoir, VA: Defense Technical Information Center, August 2011. http://dx.doi.org/10.21236/ada554485.

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5

Schlautman, Mark, Bill Batchelor, and Ihnsup Han. Removal of Chromium from Pantex Groundwater by Granular Activated Carbon: Chemical Models and Redox Chemistry of Chromium. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/761452.

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6

Morley, M. C., and G. E. Jr Speitel. Biodegradation of high explosives on granular activated carbon [GAC]: Enhanced desorption of high explosives from GAC -- Batch studies. Office of Scientific and Technical Information (OSTI), March 1999. http://dx.doi.org/10.2172/329496.

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7

Devany, R., and T. Utterback. Authorized Limit Evaluation of Spent Granular Activated Carbon Used for Vapor-Phase Remediation at the Lawrence Livermore National Laboratory Livermore, California. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/902251.

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Esser, B., W. McConachie, R. Fischer, M. Sutton, and S. Szechenyi. Radiochemical Analyses of the Filter Cake, Granular Activated Carbon, and Treated Ground Water from the DTSC Stringfellow Superfund Site Pretreatment Plant. Office of Scientific and Technical Information (OSTI), September 2005. http://dx.doi.org/10.2172/919597.

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Asmussen, Robert M., Sarah A. Saslow, James J. Neeway, Joseph H. Westsik, Kenton A. Rod, Charmayne E. Lonergan, and Bradley Johnson. Development and Characterization of Cementitious Waste Forms for Immobilization of Granular Activated Carbon, Silver Mordenite, and HEPA Filter Media Solid Secondary Waste. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1569642.

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Benovska, Mirka, Jeff Cook, Veronica Groshko, Bob Heine, and Connie Hohman. Treatment of Industrial Process Effluents & Contaminated Groundwater Using the Biological Granular Activated Carbon-Fluidized Bed Reactor (GAC-FBR) Process. Volume I. Fort Belvoir, VA: Defense Technical Information Center, September 1996. http://dx.doi.org/10.21236/ada348453.

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