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Electrocoagulation—photocatalytic process for the treatment of lithographic wastewater. Optimization using response surface methodology (RSM) and kinetic study

Paper ID Volume ID Publish Year Pages File Format Full-Text
53686 46979 2016 6 PDF Available
Title
Electrocoagulation—photocatalytic process for the treatment of lithographic wastewater. Optimization using response surface methodology (RSM) and kinetic study
Abstract

•Wastewater mainly from the offset process was collected form a local industry.•Most of all the color of the wastewater was removed in the electrocoagulation process.•Pseudo-second order kinetics suggest that intra-particle diffusion process.•The wastewater was colorless still has a high amount of organic carbon.

In this work, optimization of total organic carbon (TOC) removal for the treatment of lithographic wastewater by electrocoagulation followed by photocatalytic process was developed. It was used a response surface methodology (RSM) for the optimization of the process variables, such as current density for electrocoagulation process, TiO2 concentration for photocatalytic process, and pH in both cases. Optimal conditions for the process were obtained with TOC removal above 65% using electrochemical process by 30 min of operation. A total of 25% of residual TOC was removed employing the photocatalytic process, for a total of 74% of removal of TOC from the initial value. A kinetic modeling was performed for both processes to pseudo-second-order equations. The treated water is colorless and could be suitable for cleaning water in the lithographic process.

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Keywords
Printing waste water; Electrocoagulation; Photocatalysis; TOC removal
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Electrocoagulation—photocatalytic process for the treatment of lithographic wastewater. Optimization using response surface methodology (RSM) and kinetic study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 266, 15 May 2016, Pages 120–125
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us