期刊
CHEMOSPHERE
卷 112, 期 -, 页码 267-274出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.04.075
关键词
Antibiotics; Distribution; Risk assessment; Wangyang River
资金
- Public Service Research Project for Environmental Protection of China [20120953]
- National Natural Science Foundation of China [51178438]
- National Major Project on Water Pollution Control and Treatment of China [2012ZX07501001]
In this study, the occurrence and distribution of sixteen antibiotics belonging to four groups in surface water, sediment and groundwater samples from the Wangyang River (WYR), a typical river receiving sewage discharges were investigated. Laboratory analyses revealed that antibiotics were widely distributed in the studied area. The aqueous samples were unavoidably contaminated with antibiotics, and the target antibiotics present in high levels were oxytetracycline, tetracycline, chlortetracycline, ofloxacin, sulfamethoxazole, and trimethoprim, with maximum concentrations of the individual contaminant at 3.6 x 10(5), 9.7 x 10(3), 6.9 x 10(4), 1.2 x 10(4), 4.8 x 10(3), and 1.1 x 10(3) ng L-1, respectively. Oxytetracycline, tetracycline, ciprofloxacin and roxithromycin were the most frequently detected compounds in sediment samples, with maximum concentrations of the individual contaminant at 1.6 x 10(5), 1.7 x 10(4), 2.1 x 10(3) and 2.5 x 10(3) ng g(-1), respectively. The results also revealed that the high intensity of aquaculture activities could contribute to the increasing levels of antibiotics in the area. According to the ratios of measured environmental concentration (MEC) to predicted no-effect concentration (PNEC), chlortetracycline, tetracycline, ofloxacin, ciprofloxacin, erythromycin-H2O and sulfamethoxazole may present possible environmental risk to Pseudokirchneriella subcapitata, Synechococcus leopoliensis and M. aeruginosa. Attention should be given to the long-term ecological effects caused by the continuous discharge of antibiotics in the WYR area. (C) 2014 Elsevier Ltd. All rights reserved.
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