The role of zero valent iron on the fate of tetracycline resistance genes and class 1 integrons during thermophilic anaerobic co-digestion of waste sludge and kitchen waste
Gao, P (Gao, Pin); Gu, CC (Gu, Chaochao); Wei, X (Wei, Xin); Li, X (Li, Xiang); Chen, H (Chen, Hong); Jia, HZ (Jia, Hanzhong); Liu, ZH (Liu, Zhenhong); Xue, G (Xue, Gang); Ma, CY (Ma, Chunyan)
2017
Source PublicationWATER RESEARCH
Volume111Issue:3Pages:92-99
AbstractActivated sludge has been identified as a potential significant source of antibiotic resistance genes (ARGs) to the environment. Anaerobic digestion is extensively used for sludge stabilization and resource recovery, and represents a crucial process for controlling the dissemination of ARG5 prior to land application of digested sludge. The objective of this study is to investigate the effect of zero valent iron (Fe-0) on the attenuation of seven representative tetracycline resistance genes (tet, tet(A), tet(C), tet(G), tet(M), tet(O), tet(W), and tet(X)), and the integrase gene intl1 during thermophilic anaerobic co-digestion of waste sludge and kitchen waste. Significant decrease (P < 0.05) in the quantities of tet (except tet(W)) and intl1 genes was observed at Fe-0 dosage of 5 g/L, whereas no significant differences (P > 0.05) were found for all gene targets between digesters with Fe-0 dosages of 5 and 60 g/L. A first-order kinetic model favorably described the trends in concentrations of tet and intl1 gene targets during thermophilic anaerobic digestion with or without Fe-0. Notably, tet genes encoding different resistance mechanisms behaved distinctly in anaerobic digesters, although addition of Fe-0 could enhance their reduction. The overall results of this research suggest that thermophilic anaerobic digestion with Fe-0 can be a potential alternative technology for the attenuation of tet and intl1 genes in waste sludge.
KeywordZero Valent Iron Antibiotic Resistance Gene Integrase Gene Intl1 Waste Sludge Kitchen Waste Thermophilic Anaerobic Co-digestion
DOI10.1016/j.watres.2016.12.047
Indexed BySCI
WOS IDWOS:000395218900011
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Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4780
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Donghua Univ, Coll Environm Sci & Engn, Ctr Pollut Treatment & Control Text Ind, State Environm Protect Engn, Shanghai 201620, Peoples R China
2.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Gao, P ,Gu, CC ,Wei, X ,et al. The role of zero valent iron on the fate of tetracycline resistance genes and class 1 integrons during thermophilic anaerobic co-digestion of waste sludge and kitchen waste[J]. WATER RESEARCH,2017,111(3):92-99.
APA Gao, P .,Gu, CC .,Wei, X .,Li, X .,Chen, H .,...&Ma, CY .(2017).The role of zero valent iron on the fate of tetracycline resistance genes and class 1 integrons during thermophilic anaerobic co-digestion of waste sludge and kitchen waste.WATER RESEARCH,111(3),92-99.
MLA Gao, P ,et al."The role of zero valent iron on the fate of tetracycline resistance genes and class 1 integrons during thermophilic anaerobic co-digestion of waste sludge and kitchen waste".WATER RESEARCH 111.3(2017):92-99.
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