生态环境学报2023，Vol.32Issue(11)：1922-1932,11.DOI:10.16258/j.cnki.1674-5906.2023.11.003
成都市河流中四环素、喹诺酮类抗生素污染特征及生态风险评价
Pollution Characteristics and Ecological Risk Assessment of Tetracycline and Quinolone Antibiotics in Rivers of Chengdu
摘要
Abstract
Due to the widespread use and abuse of antibiotics in recent years,antibiotics have already been detected in various environmental media,and the ecological and health risks caused by them have attracted widespread attention.However,Chengdu currently lacks data on antibiotic contamination of surface water.Therefore,to assess the distribution characteristics and ecological risks of antibiotics in different watersheds in Chengdu,in this paper,solid phase extraction(SPE)and high-performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS)were used to monitor the pollution levels of tetracyclines and quinolones,which included a total of 25 kinds of antibiotics in five Chengdu watersheds of Fu River,Xijiang River,Pi River,Mengyang River,and Pujiang River in high and low flow periods.In addition,we also carried out an ecological risk assessment.The results showed that 16 antibiotics were detected in the two water periods,and the detection rates ranged from 0 to 90.3%.The tetracycline showed a high detection rate in both high and low flow periods,which were 87.1%and 77.4%,respectively.The total concentration of the two types of antibiotics was much higher in the low flow period than in the high flow period,the detected mass concentration ranged from ND to 642 ng L-1,and the average mass concentration was 65.6 ng∙L-1.The antibiotics with the highest concentration were the quinolones fleroxacin and ofloxacin,which were 642 ng∙L-1 and 384 ng∙L-1,respectively,and the average concentrations were 245 ng∙L-1 and 42.9 ng∙L-1.In the five watersheds studied,the residual levels of antibiotics were in the order of Xijiang River>Pujiang River>Fu River>Pi River>Mengyang River.Compared with other watersheds in China,the pollution degree of antibiotics was at a moderate level in the studied rivers.According to the environmental risk assessment method of antibiotics in the European Union technical guidance document,we conducted an ecological risk assessment for 9 kinds of the more common antibiotics.The results showed that the ecological risk in the dry season was higher than that in the high flow period.The RQ of lomefloxacin and norfloxacin in Mengyang River and Xijiang River and the doxycycline in Pujiang River were all greater than 1.The ecological additive risk of antibiotics RQ≥1,indicates that the exposure of antibiotic pollutants has potential harm to the ecological environment of the basin.关键词
成都市/四环素/喹诺酮/丰水期/枯水期/污染水平/生态风险评价Key words
Chengdu/tetracycline/quinolone/wet season/dry season/pollution level/ecological risk assessment分类
资源环境引用本文复制引用
韩迁,张玉娇,赖承钺,杨璐瑶,孟旭..成都市河流中四环素、喹诺酮类抗生素污染特征及生态风险评价[J].生态环境学报,2023,32(11):1922-1932,11.基金项目
成都市长江水生态环境保护研究(2022-LHYJ-02-0509-01) （2022-LHYJ-02-0509-01）
