Wei Chaoshuai, Wang Yinghui, Zhang Ruijie, Liu Fang, Zhang Zheng-En, Wang Jingzhen, Yu Kefu
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea; Coral Reef Research Center of China; School of Marine Sciences, Guangxi University, Nanning 530004, China.
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea; Coral Reef Research Center of China; School of Marine Sciences, Guangxi University, Nanning 530004, China; Institute of Green and Low Carbon Technology, Guangxi Institute of Industrial Technology, Nanning 530201, China.
J Hazard Mater. 2024 Mar 15;466:133550. doi: 10.1016/j.jhazmat.2024.133550. Epub 2024 Jan 24.
Antibiotics have been the subject of much attention in recent years due to their widespread use and the potential ecological risks and resistance risks. In this study, we conducted an extensive survey of 19 antibiotics in a wide range of waters of the Beibu Gulf during summer and winter (154 samples). The total concentrations of the 19 antibiotics (ΣABs, ng/L) were significantly higher in winter (n.d.-364) than in summer (n.d.-70.1) and were mainly concentrated in areas of seagoing rivers (1.50-364). The primary route for antibiotics entering Beibu Gulf was through riverine input. Precisely, florfenicol (FF) (n.d.-278 ng/L) discharged from livestock and poultry farms upstream of Nanliu River, predominantly in swine farming, constitutes the main pollutant in Beibu Gulf throughout the year. The Nanliu River (988 kg/a) accounts for 85% of the gulf's total annual antibiotic emission flux. Source analysis identified livestock and poultry farming, particularly swine farming, as the primary pollution source, contributing 58% in summer. Risk assessment reveals that algae (0.51 ± 0.56) exhibited relatively high sensitivity to antibiotics, presenting a medium-high risk at specific sites in Nanliu River during winter. Additionally, FF discharged from swine farming demonstrates a certain level of antibiotic resistance risk. Therefore, reinforcing control measures for antibiotic discharges from livestock and poultry farming, especially upstream of Nanliu River, can effectively mitigate antibiotic-related risks in the water bodies of Beibu Gulf.
近年来，由于抗生素的广泛使用以及潜在的生态风险和耐药性风险，其一直备受关注。在本研究中，我们于夏季和冬季对北部湾广泛水域中的19种抗生素进行了大规模调查（共154个样本）。19种抗生素的总浓度（ΣABs，纳克/升）在冬季（未检出 - 364）显著高于夏季（未检出 - 70.1），且主要集中在入海河流区域（1.50 - 364）。抗生素进入北部湾的主要途径是河流输入。确切地说，从南流江上游的畜禽养殖场排放的氟苯尼考（FF）（未检出 - 278纳克/升），主要来自养猪场，是北部湾全年的主要污染物。南流江（988千克/年）占该海湾抗生素年排放通量总量的85%。源分析确定畜禽养殖，尤其是养猪业，是主要污染源，在夏季贡献了58%。风险评估显示，藻类（0.51 ± 0.56）对抗生素表现出相对较高的敏感性，在冬季南流江的特定地点呈现中高风险。此外，养猪场排放的FF显示出一定程度的抗生素耐药性风险。因此，加强对畜禽养殖，特别是南流江上游抗生素排放的控制措施，可有效降低北部湾水体中与抗生素相关的风险。
