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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1927
Title: Terephthalic acid removal from aqueous solution by electrocoagulation and electro-Fenton methods: Process optimization through response surface methodology
Authors: Sandhwar V.K.
Prasad, Basheshwar Rajendra
Published in: Process Safety and Environmental Protection
Abstract: The present work deals with the treatment of terephthalic acid (TPA) and chemical oxygen demand (COD) from synthetic aqueous solution. Initially the aqueous solution was treated by acid precipitation at different pH (2–5) and temperature (15–60 °C). Approximately 87.1% of TPA and 68.85% of COD were removed by acid precipitation treatment at optimum conditions. After acid precipitation, the filtered supernatant was further treated by electrocoagulation (EC) and electro-Fenton (EF) techniques separately. Operating parameters viz. pH—(4–12), current density (A/m2)—(15.24–45.72), Na2SO4 concentration (mol/L)—(0.02–0.04) and time (min)—(10–70) for EC treatment and pH—(1–5), current density (A/m2)—(15.24–45.72), H2O2 concentration (mg/L)—(50–250) and time (min)—(10–70) for EF treatment were optimized and modeled by Central Composite Design (CCD) in response surface methodology (RSM). Maximum removal of TPA—82.76%, 91.87% COD—79.56%, 89.68% with electrical energy consumption (kWh/kg COD removed)—22.65, 18.11 were obtained through EC and EF treatment respectively at optimum conditions. Sludge generated at optimum conditions via electrochemical treatments was characterized by FTIR, XRD, SEM/EDX and TGA/DTA techniques. © 2017 Institution of Chemical Engineers
Citation: Process Safety and Environmental Protection (2017), 107(): 269-280
URI: https://doi.org/10.1016/j.psep.2017.02.014
http://repository.iitr.ac.in/handle/123456789/1927
Issue Date: 2017
Publisher: Institution of Chemical Engineers
Keywords: Electro-Fenton
Electrocoagulation
Graphite cathode
Optimization
Sludge analysis
Terephthalic acid
ISSN: 9575820
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
Corresponding Author: Sandhwar, V.K.; Department of Chemical Engineering, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [CH]

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