摘要
为探究华南地区在产企业周边地下水典型新污染物的污染现状,选取了4个不同行业企业,在其周边共采集了8个地下水样品,采用超高效液相色谱串联质谱法(UPLC-MS/MS)测定样品中的恩诺沙星、氧氟沙星、磺胺嘧啶、磺胺甲噁唑和土霉素等5种目标抗生素,结合多种分析方法,研究目标抗生素的空间分布特征、来源分析、生态风险评估和人体健康风险评估.检测结果显示,8个地下水样品中恩诺沙星检出浓度范围为43.93~228.68 ngμL^(-1),氧氟沙星检出浓度范围为100.18~199.26 ngμL^(-1),检出浓度水平相对国内其他地区较高.两种抗生素在空间分布上存在明显浓度差异,W6和W7采样点主要污染来源可能是生活污水和养殖废水等农业面源污染,W1和W4主要污染来源可能是固废和医疗废物处理的生产废水和渗滤液等工业点源污染.生态风险评估结果显示,W7地下水样品的恩诺沙星和氧氟沙星对黑头呆鱼的累计风险商值大于0.1,存在中等风险,W6对黑头呆鱼存在低风险,基于研究区域地下水用于水产养殖的现状,W6和W7两个采样点及周边区域地下水存在一定生态风险,需加强关注.人体健康风险评估结果显示,研究区域采样点的恩诺沙星和氧氟沙星对成人和儿童的人体健康无风险,其中,对儿童的健康风险商值高于成人,目前我国尚未发布不同人群的日均允许摄入量标准,还需进一步深入研究,以便进行更精确的健康风险评估.
In order to explore the pollution status of emerging contaminants in groundwater around industrial enterprises in South China,four industries were selected,and a total of eight groundwater samples were collected around these industries.Ultra-high-performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)was used to determine the concentrations of enrofloxacin,ofloxacin,sulfadiazine,sulfamethoxazole,and tetracycline in the samples.Combined with various analytical methods,the study investigated the spatial distribution characteristics,source analysis,and ecological risk assessment of the target antibiotics.The test results showed that enrofloxacin was detected in the range of 43.93 to 228.68 ng·L^(−1),and ofloxacin was detected in the range of 100.18 to 199.26 ng·L^(−1) in groundwater samples.The detected concentration levels were relatively high compared to some regions of China.There were significant concentration differences in the spatial distribution of the two antibiotics,which may be related to the pollution sources and intensity.The main sources of pollution at W6 and W7 sampling points were agricultural non-point source pollution from domestic sewage and livestock waste,while the main sources of pollution at W1 and W4 sampling points were industrial point source pollution from solid waste and medical waste treatment production wastewater and leachate.The ecological risk assessment results showed that RQsum of enrofloxacin and ofloxacin at sampling point W7 to Pimephales promelas was greater than 0.1,indicating a medium risk,and there was a low risk to P.promelas at sampling point W6.Based on the current situation of groundwater used for fish and shrimp aquaculture in the study area,there were certain ecological risks in the groundwater of sampling points W6 and W7 that require further attention.The human health risk assessment results showed that enrofloxacin and ofloxacin in the sampling points of the study area posed no risk to the health of adults and children.The health risk quotient for children was higher than that for adults.Currently,there are no acceptable daily intake standards for different populations in China,and further in-depth research is needed to conduct a more accurate health risk assessment.
作者
杨婕
邓一荣
赵岩杰
李德安
李洪伟
吴俭
郑晓波
YANG Jie;DENG Yi-rong;ZHAO Yan-jie;LI De-an;LI Hong-wei;WU Jian;ZHENG Xiao-bo(College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,China;Guangdong-Hong Kong-Macao Laboratory of Soil Pollution Fate and Risk Management in Earth's Critical Zone,Guangdong Key Laboratory of Contaminated Environmental Management and Remediation,Guangdong Provincial Academy of Environmental Science,Guangzhou 510045,China)
出处
《环境科学》
北大核心
2026年第1期312-319,共8页
Environmental Science
基金
国家自然科学基金项目(42577476)
国家重点研发计划项目(2022YFC3703105)。
关键词
土壤
地下水
新污染物
农业面源污染
工业点源污染
生态风险评估
健康风险评估
soil
groundwater
emerging contaminants
agricultural non-point source pollution
industrial point source pollution
ecological risk assessment
health risk assessment
