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Water Res

Title:		Motivation of reactive oxygen and nitrogen species by a novel non-thermal plasma coupled with calcium peroxide system for synergistic removal of sulfamethoxazole in waste activated sludge
Author(s):		Zhang A; Zhou Y; Li Y; Liu Y; Li X; Xue G; Miruka AC; Zheng M; Liu Y;
Address:		"College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, Kay Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Department of Civil & Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; Key Laboratory of Organic Compound Pollution Control Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. Electronic address: mzheng2@ualberta.ca. College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: liuyanan@dhu.edu.cn"
Journal Title:		Water Res
Year:		2022
Volume:		20220129
Issue:
Page Number:		118128 -
DOI:		10.1016/j.watres.2022.118128
ISSN/ISBN:		1879-2448 (Electronic) 0043-1354 (Linking)
Abstract:		"Large amounts of antibiotics are concentrated in waste activated sludge (WAS) and released into the environment. It is thus critical to develop advanced sludge treatment technology to remove these antibiotics. Dielectric barrier discharge (DBD) combined with calcium peroxide (CaO(2)), as an innovative technology to attenuate sulfamethoxazole (SMX) in sludge, was investigated. Evident synergistic effects between DBD and CaO(2) were observed on the SMX degradation with a synergistic factor of 2.02. Moreover, the energy consumption of DBD/CaO(2) was significantly lower than that of DBD alone. At a typical CaO(2) dosage of 0.1 g/g TS and discharge power of 64.5 W, the highest SMX removal of 96% was achieved within 50 min. The synergistic effects of DBD/CaO(2) could be associated with the base catalysis of H(2)O(2) and O(3), UV-base-photolysis, peroxone oxidation, and photocatalytic H(2)O(2). DBD/CaO(2) generated various reactive oxygen species (ROS) and nitrogen species (RNS) that participated in SMX removal. The contributions of these reactive species followed the sequence of e(-) > *OH > *O(2)(-) > (1)O(2) > ONOO(-). Based on the detected transformation by-products and their variations during treatment, a plausible SMX degradation pathway in sludge was proposed. Besides, DBD/CaO(2) also promoted sludge disintegration, dewatering, heavy metal removal, sludge reduction, sludge solubilization, and acetate-enriched volatile fatty acid (VFA) production. Therefore, DBD/CaO(2) exhibited great potential for controlling antibiotic, as well as promoting sludge reduction, decontamination, and resourcization"
Keywords:		"Hydrogen Peroxide Motivation Nitrogen Oxidation-Reduction Oxygen Peroxides *Sewage *Sulfamethoxazole Waste Disposal, Fluid Calcium peroxide Degradation mechanism Dielectric barrier discharge Reactive radicals Sulfamethoxazole Waste activated sludge;"
Notes:		"MedlineZhang, Ai Zhou, Yongquan Li, Yongmei Liu, Yanbiao Li, Xiang Xue, Gang Miruka, Andere Clement Zheng, Ming Liu, Yanan eng England 2022/02/09 Water Res. 2022 Apr 1; 212:118128. doi: 10.1016/j.watres.2022.118128. Epub 2022 Jan 29"