Insights into the Occurrence, Elimination Efficiency and Ecological Risk of Antibiotics in Rural Domestic Wastewater Treatment Facilities Along the Yangtze River, China

作     者：Xing, Liqun Sun, Jie Kong, Fanjie Kong, Ming Li, Jun Zhang, Rui Li, Aimin 

作者机构：State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Chemistry and Chemical Engineering Southeast University Nanjing210096 China Nanjing University Yancheng Academy of Environmental Protection Technology and Engineering Yancheng224000 China Suzhou Capital Greinworth Environmental Protection Technology Co. Ltd Suzhou215216 China Beijing Capital Eco-Environment Protection Group Co. Ltd Beijing100044 China Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment No.8 Jiangwangmiao Street Nanjing210042 China School of Water Conservancy and Environment University of Jinan Jinan250022 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Effluents 

摘      要：China is embarking on the treatment of rural domestic wastewater, but little information on the characteristics of antibiotics in the rural domestic wastewater is available. Thus, the occurrence, elimination efficiency and ecological risk of antibiotics, as well as conventional wastewater quality parameters were investigated in influents and effluents from rural domestic wastewater treatment facilities (RD-WWTFs) along the Yangtze River. Elimination efficiencies of 33 out of investigated 41 RD-WWTFs (accounting for 80.5%) were effective. Higher values of conventional wastewater quality parameters in influents were found, however, more effective removal of them in the lower reaches. Of 39 target antibiotics selected, 26 ones were detected in the influents and effluents with a detection frequency (DF) between 2.4% and 100%. No significant decrease of antibiotics was observed in the effluents compared with that in the influents except chlortetracyclin (CTE) and tetracycline (TCs). The composition characteristics of antibiotics showed regional differences, but were similar between the effluents and influents. Among these antibiotics, ofloxacin (OFX), doxycycline (DOX), roxithromycin (ROX) and lincomycin (LIN) were the predominant ones with the highest DFs, totally accounted for a median percentage of more than 60% of ΣAB concentrations in both influents and effluents. The calculated ecological risk values of ΣABs showed that 11 effluents presented high risks (26.8%), 18 ones had moderate risks (43.9%), and the rest 12 ones showed low risks (29.3%). For a single antibiotic, oxytetracycline (OXY), norfloxacin (NOR), LIN and ROX contributed the most to the ecological risk values. These results indicated that the overall elimination effect of antibiotics in rural domestic wastewater was very limited, which was likely to have potential adverse impacts on aquatic ecosystems along the Yangtze River. © 2022, The Authors. All rights reserved.