Electrocoagulation treatment of arsenic in wastewaters: A comprehensive review

Song, Peipei; Yang, Zhen; Zeng, Guangming; Yang, Xin; Xu, Haiyin; Wang, Like; Xu, Rui; Xiong, Weiping; Ahmad, Kito

doi:10.1016/j.cej.2017.02.086

Cited by 269 publications

(75 citation statements)

References 130 publications

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“…The anode-generated hydroxyl radicals play a part in indirect ammonia oxidation [33] for the formation of flocs in the flotation process. Through the removal of ammonia using the EC process, organic pollutants are also removed by direct oxidation [16,27]. Considering this improvement mechanism, the main aim of this study was to achieve high removal contaminant efficiency of HN 3 -H with the application of ZEAP in treating saline landfill leachate.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Analysis of Zeolite Augmented Electrocoagulation Process in the Reduction of High-Strength Ammonia in Saline Landfill Leachate

Hamid

Aziz

Yusoff

et al. 2020

Water

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This work examined the behavior of a novel zeolite augmented on the electrocoagulation process (ZAEP) using an aluminum electrode in the removal of high-strength concentration ammonia (3471 mg/L) from landfill leachate which was saline (15.36 ppt) in nature. For this, a response surfaces methodology (RSM) through central composite designs (CCD) was used to optimize the capability of the treatment process. Design-Expert software (version 11.0.3) was used to evaluate the influences of significant variables such as zeolite dosage (100–120 g), current density (540–660 A/m2), electrolysis duration (55–65 min), and initial pH (8–10) as well as the percentage removal of ammonia. It is noted that the maximum reduction of ammonia was up to 71%, which estimated the optimum working conditions for the treatment process as follows: zeolite dosage of 105 g/L, the current density of 600 A/m2, electrolysis duration of 60 min, and pH 8.20. Furthermore, the regression model indicated a strong relationship between the predicted values and the actual experimental results with a high R2 of 0.9871. These results provide evidence of the ability of the ZAEP treatment as a viable alternative in removing high-strength landfill leachate of adequate salinity without the use of any supporting electrolyte.

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Section: Introductionmentioning

confidence: 99%

Optimization and Analysis of Zeolite Augmented Electrocoagulation Process in the Reduction of High-Strength Ammonia in Saline Landfill Leachate

Hamid

Aziz

Yusoff

et al. 2020

Water

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“…These metal ions of iron or aluminum anodes produce insoluble Fe(OH) 3 and Al(OH) 3 flocs, which are pH dependent [23][24][25] , which remove dissolved inorganic and organic compounds by surface complexation or electrostatic attraction.…”

Section: The Electrocoagulation Methods (Ec) Is a Simple And Efficientmentioning

confidence: 99%

Elimination of Industrial Textile Dye by Electrocoagulation Using Iron Electrodes

Vidal

Espinoza

Contreras

et al. 2017

J. Chil. Chem. Soc.

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Electrocoagulation is a promising technique for the treatment of wastewater like the produced by the textile industry, which generates large volumes of water containing dyes. Thus, synthetic samples of the textile dye acid black 194 (AB194, CI 22910) were treated by this method using iron anodes at two different initial pH values. Tafel studies in the presence and absence of the dye were performed.The complete removal of AB194 from 1.0 L of solution in a static cell was achieved, at short electrolysis times, applying low-density currents at two different initial pH values.In addition, the operating costs by mass consumed anode, per cubic meter electocoagulated and per TOC unit, were assessed to help determine the most efficient conditions, considering a future application of the method in the industry.

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“…The predominance of each mechanism depends on the nature of the organic pollutant (load, size, functional groups, hydrophobicity, etc.) as well as the type of coagulant and its dosage [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Removal of Algestone Acetophenide and Estradiol Enanthate in Real Industrial Wastewater

Morais¹

2019

International Journal of Electrochemical Science

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Contaminants removal from industrial effluent is a major environmental concern. In this context, Algestone Acetophenide and Estradiol Enanthate are synthetic sex hormones widely used in the manufacture of contraceptives, whose presence in waterbodies may lead to environmental hazard. Given that so far, the methods employed in the removal of these drugs have presented limited efficiency or high implementation costs, the present work presented an electrochemical reactor composed by 32 carbon steel electrodes (1728 cm 2), which was employed in a real scale model to remove these synthetic hormones in an industrial pharmaceutical effluent. After 60 minutes the removal efficiency of the hormones Algestone Acetophenide and Estradiol Enanthate was of 88.9% and of 91.8% respectively, with low energy consumption (< 0.742 kWh.m-3). Physicochemical parameters such as color, turbidity, Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) also showed good removal efficiency too (> 50%), which implicates that the method herein depicted may be a valuable alternative to promote the removal of these contaminants in industrial wastewater.

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Electrocoagulation treatment of arsenic in wastewaters: A comprehensive review

Cited by 269 publications

References 130 publications

Optimization and Analysis of Zeolite Augmented Electrocoagulation Process in the Reduction of High-Strength Ammonia in Saline Landfill Leachate

Optimization and Analysis of Zeolite Augmented Electrocoagulation Process in the Reduction of High-Strength Ammonia in Saline Landfill Leachate

Elimination of Industrial Textile Dye by Electrocoagulation Using Iron Electrodes

Electrochemical Removal of Algestone Acetophenide and Estradiol Enanthate in Real Industrial Wastewater

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