Journal
CHEMICAL ENGINEERING JOURNAL
Volume 267, Issue -, Pages 282-288Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.01.030
Keywords
Advanced oxidation process; Non-thermal plasma; Biodegradability; Mineralization; Degradation mechanism
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Funding
- National Natural Science Foundation of China (NSFC) [U1162128, U1462201]
- China Postdoctoral Science Foundation [2013M541784]
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Non-thermal plasma in cylindrical wetted-wall reactor was used to evaluate the degradation feasibility of non-steroidal anti-inflammatory drug ibuprofen (IBP) in aqueous solution and the corresponding kinetics were investigated. The influences of initial concentration and pulse repetition rate were studied. After 80 min plasma treatment, 91.7% removal of IBP was achieved and the degradation yield was 6.9 g/kW h for the initial concentration of 60 mg/l. The decomposition of IBP was in accordance with the first order reaction and the rate constant was 30.3 x 10(-3) min(-1). Degradation byproducts during plasma treatment were obtained by HPLC-MS and the possible degradation pathway was proposed. The total organic carbon (TOC) in the residual solution remained high although IBP was almost completely degraded. However, the high biodegradable index (BOD5/COD) indicated that it can be further degraded by the biological treatment. (C) 2015 Elsevier B.V. All rights reserved.
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