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Indexed by:期刊论文

Date of Publication:2012-01-15

Journal:CHEMICAL ENGINEERING JOURNAL

Included Journals:SCIE、EI

Volume:180

Page Number:99-105

ISSN No.:1385-8947

Key Words:DBD plasma; Soil remediation; Antibiotics; Chloramphenicol

Abstract:The remediation of antibiotics-contaminated soil using dielectric barrier discharge (DBD) plasma at atmospheric pressure was investigated in this study. Experimental results showed that the degradation efficiency of chloramphenicol (CAP) approached 81% after 20 min of plasma treatment. Increasing applied voltage was beneficial for CAP decomposition, due to higher production of active species. Experiments conducted under different gas atmospheres (O-2, air, N-2, Ar) indicated that O-3 made a major contribution to CAP degradation. Large oxygen flow rate favored the abatement of CAP in soil and the optimal soil moisture content was found as 10%. As iron element abounded in soil, the effect of Fe-0 with different levels was examined and the improvement on CAP degradation was obtained. The system of DBD plasma performed a high level decomposition with initial CAP concentration between 200 and 1000 mg kg(-1). CAP molecules experienced O-H, phenyl-N bonds rupture and dechlorination, oxidation reactions through identifying intermediates of CAP degradation using HPLC/MS. Based on HPLC/MS analysis, a possible pathway of CAP degradation in soil in this system was also proposed. (C) 2011 Elsevier B.V. All rights reserved.