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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1923
Title: Comparison of phthalic acid removal from aqueous solution by electrochemical methods: Optimization, kinetic and sludge study
Authors: Sandhwar V.K.
Prasad B.
Published in: Journal of Environmental Management
Abstract: In this work, comparative study between electrochemical processes such as electrocoagulation (EC), peroxi-coagulation (PC) and peroxi-electrocoagulation (PEC) was performed for the removal of phthalic acid (PA) and chemical oxygen demand (COD) from aqueous medium. Initially, acid treatment was studied at various pH (1–3) and temperature (10–55 °C). Subsequently, the supernatant was re-treated by electrochemical processes such as EC, PC and PEC separately. Independent parameters viz. pH, current density (CD), electrolyte concentration (m), electrode gap (g), H2O2 concentration and electrolysis time (t) were optimized by Central Composite Design (CCD) for these electrochemical processes. All three processes were compared based on removal, energy consumption, kinetic analysis, operating cost and sludge characteristics. In this study, PEC process was found more efficient among EC, PC and PEC processes in order to get maximum removal, minimum energy consumption and minimum operating cost. Maximum removal of PA- 68.21%, 74.36%, 82.25% & COD- 64.79%, 68.15%, 75.21% with energy consumption - 120.95, 97.51, 65.68 (kWh/kg COD removed) were attained through EC, PC and PEC processes respectively at their corresponding optimum conditions. Results indicated that PA and COD removals are in order of PEC > PC > EC under optimum conditions. First order kinetic model was found able to describe the degradation kinetics and provided best correlation for the removal rate within the acceptable error range. © 2017 Elsevier Ltd
Citation: Journal of Environmental Management (2017), 203(): 476-488
URI: https://doi.org/10.1016/j.jenvman.2017.08.022
http://repository.iitr.ac.in/handle/123456789/1923
Issue Date: 2017
Publisher: Academic Press
Keywords: Acid precipitation
Central composite design
Electrochemical treatment
Kinetic study
Phthalic acid
ISSN: 3014797
Author Scopus IDs: 57193263981
15838004000
Author Affiliations: Sandhwar, V.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Prasad, B., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Funding Details: Authors are thankful to Institute Instrumentation Centre and Department of Chemical Engineering, IIT Roorkee, India, for providing facilities for this work. Authors would like to thanks to MHRD Grant No.- MHR02-23/41-103-427/429 , Government of India for providing financial support. Appendix A
Corresponding Author: Sandhwar, V.K.; Department of Chemical Engineering, Indian Institute of Technology RoorkeeIndia; email: vksandhwar@gmail.com
Appears in Collections:Journal Publications [CH]

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