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Indexed by:Journal Papers

Date of Publication:2020-04-10

Journal:SCIENCE OF THE TOTAL ENVIRONMENT

Included Journals:PubMed、EI、SCIE

Volume:712

Page Number:136370

ISSN No.:0048-9697

Key Words:Sludge treatment wetlands; Nutrients; Antibiotics; Antibiotic resistance genes; Removal efficiency

Abstract:The aim of this research was to analyze the elimination of nutrients, antibiotics as well as antibiotic resistance genes (ARGs) in different sludge treatment wetlands (STWs) with or without reeds and aeration tubes. Five antibiotics, including oxytetracycline, tetracycline, azithromycin, sulfamethoxazole, and sulfadiazine; five ARGs, including two tetracycline ARGs (tetC and tetA), one macrolide ARGs (ermB), and two sulfonamide ARGs (sul1 and sul2); and one integrase gene (intI1) were determined in the surface and bottom layers of three STWs, respectively. The removal efficiencies of antibiotics in the bottom layer were lower than that in the surface layer, while the elimination efficiencies of ARGs showed opposite trend. Strong correlations were observed among the contents of antibiotics as well as related ARGs, and the abundance of ARGs had a strong correlation with intI1 The results demonstrated that the contents of these pollutants decreased during the resting period in all the STWs, while the wetland had reeds and aeration tubes performed the best. (C) 2020 Elsevier B.V. All rights reserved.