Journal ArticleDOI
A comparative study of electrocoagulation, electrochemical Fenton, electro-Fenton and peroxi-coagulation for decolorization of real textile wastewater: Electrical energy consumption and biodegradability improvement
Farshid Ghanbari,Mahsa Moradi +1 more
TLDR
In this article, the effects of initial pH, electrical current and electrolysis time on textile wastewater decolorization were evaluated and the results indicated that the ECF process was more effective than the other processes with regard to color and COD removals.Abstract:
The main problem of textile wastewater is strong color which must be removed before discharge to the environment. Electrochemical processes have been separately studied for decolorization of synthetic dyes and colored wastewater. In this study, iron-based electrochemical processes including electrocoagulation (EC), electrochemical Fenton (ECF), electro-Fenton (EF) and peroxi-coagulation (PC) were applied for real textile wastewater decolorization in similar conditions. The effects of initial pH, electrical current and electrolysis time on decolorization were evaluated. COD removal, electrical energy consumption, iron consumption and BOD 5 /COD ratio of each process were compared. All the processes sufficiently removed color from the wastewater in as much as between 77% and 94% decolorization efficiency was gained. The results indicated that decolorization efficiency in EC and EF processes was strongly dependent on initial pH. At optimum conditions, the highest energy consumption and iron consumption were found in EF and PC respectively. Electrochemical processes based on Fenton reagent (ECF, EF and PC) enhanced BOD 5 /COD ratio from 0.137 to over 0.3 while EC process could not increase BOD 5 /COD ratio significantly. All the processes followed the second order kinetic for COD parameter in optimum conditions. As a comparison from the obtained results, the ECF process was more effective than the other processes with regard to color and COD removals.read more
Citations
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Journal ArticleDOI
Application of peroxymonosulfate and its activation methods for degradation of environmental organic pollutants: Review
Farshid Ghanbari,Mahsa Moradi +1 more
TL;DR: A literature review on environmental application of peroxymonosulfate (PMS) in degradation of contaminants to clarify the performance of PMS is carried out in this paper, which describes the PMS usage in remediation of environmental pollutants with focus on the different methods of activation and the effect of main operational parameters on PMS-based processes.
Journal ArticleDOI
Electrochemical oxidation of organic pollutants for wastewater treatment
TL;DR: In this paper, a review of the electrochemical oxidation of organic pollutants for water treatment is provided, focusing on the direct EO or anodic oxidation, and the indirect EO by electrogenerated active chlorine, the most important mediated process.
Journal ArticleDOI
A review of the existing and emerging technologies in the combination of AOPs and biological processes in industrial textile wastewater treatment
TL;DR: In this article, the authors present the recent developments in Advanced Oxidation Processes (AOPs), biological processes and their combinations for industrial textile wastewater, focusing on the comparison of cost effectiveness of wastewater treatment processes.
Journal ArticleDOI
Coupling of electrocoagulation and ozone treatment for textile wastewater reuse
TL;DR: In this article, the advantages of coupling electrocoagulation (EC) and ozonation (O3) as one-step and two-step operations, respectively, were presented.
Journal ArticleDOI
Comparative performance of anodic oxidation and electrocoagulation as clean processes for electrocatalytic degradation of diazo dye Acid Brown 14 in aqueous medium
TL;DR: A kinetic model is developed for evaluation of the pseudo-first-order-rate constant (kapp) as a function of various operational parameters and indicates that the EC is more effective than AO under the same operational condition.
References
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TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Journal ArticleDOI
Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry
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TL;DR: In this paper, a review of the electrochemical methods used at lab and pilot plant scale to decontaminate synthetic and real effluents containing dyes, considering the period from 2009 to 2013, as an update of our previous review up to 2008.
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Electrochemical advanced oxidation processes: today and tomorrow. A review
TL;DR: A general overview of the application of EAOPs on the removal of aqueous organic pollutants is presented, first reviewing the most recent works and then looking to the future.