http://repository.iitr.ac.in/handle/123456789/1919
Title: | A comparative study of electrochemical degradation of benzoic acid and terephthalic acid from aqueous solution of purified terephthalic acid (PTA) wastewater |
Authors: | Sandhwar V.K. Prasad, Basheshwar Rajendra |
Published in: | Journal of Water Process Engineering |
Abstract: | In this article, studies have been performed on the treatment of benzoic acid (BA), terephthalic acid (TPA) and COD from synthetic binary solution of PTA wastewater. Acid precipitation pretreatment of aqueous solution was performed initially at different pH (2–5) and temperature (15–60 °C). The acid treated solution was re-treated by electrochemical oxidation (EO) and electro-Fenton (EF) techniques using graphite electrodes. Independent operating parameters namely initial pH: (1–9), current density (A/m2): (30.48–91.45), electrolyte concentration (g/L): (0.5–1.5) and electrolysis time (min): (10–90) for EO process and pH (1–5), current density (A/m2): (30.48–91.45), Fe2+ concentration (mmol/L): (0.5–1.5) and electrolysis time (min): (10–90) for EF process were modeled and optimized by central composite design (CCD) in response surface methodology (RSM). The maximum removal efficiencies of the process during EF treatment were 80.45% of BA, 76.83% of TPA and 73.70% of COD with energy consumption (kWh/kg COD removed) – 19.39 at optimum operating conditions. During EC treatment removal capacities were 70.76%, 68.52% and 67.27% with 31.01 (kWh/kg COD removed) respectively. It was observed that EF process was more efficient than EO based on removals of BA, TPA and COD with minimum energy consumption. © 2017 Elsevier Ltd |
Citation: | Journal of Water Process Engineering (2019), 30(): - |
URI: | https://doi.org/10.1016/j.jwpe.2017.03.006 http://repository.iitr.ac.in/handle/123456789/1919 |
Issue Date: | 2019 |
Publisher: | Elsevier Ltd |
Keywords: | Benzoic acid Electro-Fenton Electrochemical oxidation Graphite electrode Terephthalic acid |
ISSN: | 22147144 |
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 grateful to the Department of Chemical Engineering, Indian Institute of Technology, Roorkee, for providing technical facilities and Ministry of Human Resource Development (Grant No. MHR02-23/41-103-427/429 ), New Delhi, India for financial support. |
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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