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Type: Journal article
Title: Excellent performance of electro-assisted catalytic wet air oxidation of refractory organic pollutants
Author: Sun, M.
Zhang, Y.
Kong, S.
Zhai, L.
Wang, S.
Citation: Water Research, 2019; 158:313-321
Publisher: Elsevier
Issue Date: 2019
ISSN: 0043-1354
Statement of
Min Sun, Yu Zhang, Shi-Yu Kong, Lin-Feng Zhai, Shaobin Wang
Abstract: Catalytic wet air oxidation (CWAO) is a clean process for the treatment of toxic and/or biorefractory contaminants while it is a challenge to perform the CWAO at room temperature. Herein, we report an electro-assisted CWAO (ECWAO) process using partially oxidized nickel (Ni@NiO) immobilized on a porous graphite felt (GF) as a catalytic anode. Such a process demonstrates extensive effectiveness and good stability in the deep oxidation of various organic pollutants including triclosan (TCS), bisphenol A, ciprofloxacin, sulfamethoxazole, congo red, crystal violent and rodamine B at room temperature. The typical pollutant TCS is rapidly degraded within 105 min with a mineralization efficiency of 86.0 ± 1.4%, at specific energy consumption of 5.3 ± 0.3 kW h kg-TOC⁻¹. NiO is identified as the catalytically active site at which O₂ is dissociated and electro-activated to oxidize the TCS at room temperature. The ECWAO process on the anodic Ni@NiO/GF presents a great potential as an environmental-friendly and energy-saving process for treating high concentrations of refractory organic pollutants under ambient condition.
Keywords: Nickel oxide; catalysis; anode electric field; air oxidation; mineralization
Rights: © 2019 Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.watres.2019.04.040
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