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Indexed by:期刊论文

Date of Publication:2017-10-01

Journal:SCIENCE OF THE TOTAL ENVIRONMENT

Included Journals:SCIE、EI、PubMed、ESI高被引论文、Scopus

Volume:595

Page Number:521-527

ISSN No.:0048-9697

Key Words:Antibiotics; South Yellow Sea; Coastal area; Risk assessment

Abstract:The occurrence and distribution of 25 antibiotics from 5 categories in Yancheng coastal area of the South Yellow Sea were investigated using solid-phase extraction coupled with high-performance liquid chromatography tandem mass spectrometry. Results showed that these antibiotics were widely present in this region with the total concentration up to 1349.2 ng/L. Fluoroquinolones and sulfonamides were the most abundant categories contributing 46.5%, and 21.4% to the total antibiotics burden. Trimethoprim was the antibiotic detected in all the samples. The detection rates of erythromycin-H2O, sulfamethoxazole and florfenicol were 70.0%, 56.7% and 53.4%, respectively. The distribution of antibiotics demonstrated a seaward decreasing trend with the attenuation rate ranging from 0.07 to 0.19 km(-1) in this region. Log total antibiotic concentrations was significantly correlated with DOC (dissolved organic carbon) contents, salinity and distance from the coast (p < 0.05), which indicated the vital effect of these factors on the transport and fate of antibiotics. Risk assessment revealed that individual antibiotic could mainly pose a low to medium ecological risk, while the risk of antibiotic mixture on aquatic organisms needed further investigation. (C) 2017 Elsevier B.V. All rights reserved.