Electrocatalysis in wastewater treatment: recent mechanism advances

Martínez‐Huitle, Carlos A.; Andrade, Leonardo S.

doi:10.1590/s0100-40422011000500021

Cited by 113 publications

(60 citation statements)

References 29 publications

(62 reference statements)

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“…Comninellis and Chen [10] indicated that the nature and amount of intermediates formed during electrochemical mineralization of organic compounds at BDD anodes depends on the process conditions. In the literature, it was reported that the main intermediates were aliphatic compounds such as oxalic and maleic acids which may undergo further anodic oxidation at a much lower rate [10,22,36,37]. Therefore, in our previous study [9], a novel parameter was defined in Eq.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical oxidation of sulfadiazine antibiotic using boron-doped diamond anode: application of response surface methodology for process optimization

Körbahti

Taşyürek

2016

Desalination and Water Treatment

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A B S T R A C TElectrochemical oxidation and process optimization of sulfadiazine antibiotic were investigated in a batch electrochemical reactor using boron-doped diamond (BDD) anode. Reaction conditions were operated at 200-1,000 mg/L sulfadiazine concentration, 0-8 g/L supporting electrolyte (NaCl), 4-20 mA/cm 2 current density, and 25-45˚C reaction temperature at 120 min reaction time. Process optimization was accomplished through response surface methodology in central composite designed experiments. Optimum operating conditions were determined under specified cost-driven constraints at 13.4 mA/cm 2 current density, 618 mg/L sulfadiazine concentration, 3.6 g/L electrolyte concentration, and 36˚C reaction temperature. In a specific batch run at response surface-optimized conditions, the responses for sulfadiazine removal, COD removal, EOX, and energy consumption were achieved as 100.0%, 95.5%, 0.0617, and 94.3 kWh/kg COD r , respectively. Relative error values in this optimization study for the electrochemical oxidation of sulfadiazine antibiotic using BDD anode were obtained below 2%.

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Section: Resultsmentioning

confidence: 99%

Electrochemical oxidation of sulfadiazine antibiotic using boron-doped diamond anode: application of response surface methodology for process optimization

Körbahti

Taşyürek

2016

Desalination and Water Treatment

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“…Canizares는 전기화학 반응기를 음극과 양극 반응 영역 그리고 간접산화가 일어나는 벌크영역 3가지 영역으로 나누어 모델링을 진행하였으며 [13], Mascia는 BDD 전극에서의 hydroxyl radical과 유기물 확산에 의한 산화반응 모델링을 연구하 였다 [14]. (1), (2), (3)에 나타내었다 [18]. …”

Section: 유기물 양극산화에 대한 수학적 모델링 연구는 가장 먼저 Comninellisunclassified

Modeling and Optimization of High Strength Wastewater Treatment Using the Electro Oxidation Process

Lee¹,

Lee²,

Hwang³

et al. 2016

Korean Chemical Engineering Research

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-Electro oxidation system was designed in this study for the reduction of COD (Chemical Oxygen Demand) from high-strength wastewater, produced during refinery turnaround period. First, BDD (Boron Doped Diamond) electrode was synthesized and electro oxidation system of actual industrial wastewater was developed by adopting the synthesized BDD electrode. The experiments were carried out under various operating conditions under certain range of current density, pH, electrolyte concentration and reaction time. Secondly, reaction kinetics were identified based on the experimental results, and the kinetics were embedded into a genetic mathematical model of the electro oxidation system. Lastly, design and operating parameters of the process were optimized to maximize the efficiency of the pretreatment system. The coefficient of determination (R 2 ) of the model was found to be 0.982, and it proved high accuracy of the model compared with experimental results.

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“…[23] However, when the aim is to eliminate organic load, color and odor, a limiting factor is that organic compounds cannot be destroyed (mineralized) by this method alone, thus requiring the use of additional treatments. [40,41] During this process, the organic matter in solution diffuses from the bulk solution to the electrode/ solution interface, where it is transformed into CO 2 and H 2 O. [31] These methods are characterized by their generation of hydroxyl radicals ( * OH), which can mineralize highly recalcitrant compounds.…”

Section: Introductionmentioning

confidence: 99%

Landfill Leachate Treatment by Combining Coagulation and Advanced Electrochemical Oxidation Techniques

et al. 2019

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This paper presents and discusses the results obtained in the treatment of raw landfill leachate (RLL) with a combination of coagulation-flocculation (Alum) and electrochemical techniques, using a filter-press reactor with a boron-doped diamond electrode. The success of the treatment was demonstrated by the quality of the treated water, which was evaluated based on parameters such as color, odor, turbidity, chemical oxygen demand, biochemical oxygen demand, free and total chlorine, total nitrite and nitrate, ammonia and microbiological tests (mesophiles and termotolerant coliforms). The best conditions for coagulation-flocculation involved a dosage of 20 mL/L Al 2 (SO 4 ) 3 (50 g/L) at pH 6.0. To reduce energy consumption, the electrochemical treatments were carried out by applying different limiting current density (i lim ) step sequences. This strategy reduced the energy consumed in the removal of the organic load by up to 40 % while maintaining a similarly effective mineralization rate (> 90 % COD removal) between the steps. Microbiological tests revealed that the number of mesophiles was more than twelve orders of magnitude lower after electrolysis, indicating the important sanitizing effect caused by the HClO/chloramine species generated in the process. Color, turbidity and ammoniacal nitrogen were completely eliminated from the treated leachate by the end of the electrolysis process.[a] M.

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Electrocatalysis in wastewater treatment: recent mechanism advances

Cited by 113 publications

References 29 publications

Electrochemical oxidation of sulfadiazine antibiotic using boron-doped diamond anode: application of response surface methodology for process optimization

Electrochemical oxidation of sulfadiazine antibiotic using boron-doped diamond anode: application of response surface methodology for process optimization

Modeling and Optimization of High Strength Wastewater Treatment Using the Electro Oxidation Process

Landfill Leachate Treatment by Combining Coagulation and Advanced Electrochemical Oxidation Techniques

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