珠江三角洲北江饮用水源地新污染物的非靶向筛查与生态风险评估  

Non-targeted Screening and Ecological Risk Assessment of Emerging Contaminants in Beijiang Drinking Water Source of the Pearl River Delta

作　　者：王芝玉 李秋 张扬忠 陈振国 肖力 罗焰 邓耀烙 梁东海 汪晓军 WANG Zhi-yu;LI Qiu;ZHANG Yang-zhong;CHEN Zhen-guo;XIAO Li;LUO Yan;DENG Yao-luo;LIANG Dong-hai;WANG Xiao-jun(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Guangzhou Beijiang Raw Water Supply Co.,Ltd.,Guangzhou 510801,China;School of Environment,South China Normal University,Guangzhou 510006,China)

机构地区：[1]华南理工大学环境与能源学院,广州510006 [2]广州北江原水供应有限公司,广州510801 [3]华南师范大学环境学院,广州510006

出　　处：《环境科学》2024年第11期6555-6564,共10页Environmental Science

基　　金：北江水源水典型新兴污染物的分布及其特征研究项目(YSHT22007F0301,YSHT22030F0302)。

摘　　要：为探究北江饮用水源地新污染物(ECs)的时空分布特征和评估生态风险水平,采用超高效液相色谱-质谱联用技术进行1 a(2022年6月至2023年5月)的非靶向筛查,并对8种典型ECs的浓度进行定量检测.结果表明:非靶向筛查共识别出346种污染物,其中工业材料、药品和农药是最主要的污染物,总共占比88.2%;8种典型ECs的检出浓度范围在n.d(未检出)~180 ng·L^(-1),6种检出率在80%以上,内分泌干扰物类:双酚A(BPA)、4-壬基酚(4-NP)以及农药类阿特拉津(ATZ)、异丙草胺(PPS)是其中浓度较高的污染物(中值8.12~35.58 ng·L^(-1));ATZ、PPS、罗红霉素(ROX)和布洛芬(IBU)春季浓度显著高于其他3个季节(P<0.05);采样点1(S1)与采样点3(S3)的ATZ和洛美沙星(LOM)以及采样点2(S2)的4-NP生态风险水平较高(RQ>1),4-NP和ATZ因其高检出率与较高的生态毒性,需要引起关注.由于ATZ主要来源于农业领域,其浓度水平随季节变化显著,建议在春季时期加强管控.该研究为加强对该区域ECs的认识提供了有价值的参考.To investigate the spatial and temporal distribution characteristics and assess the ecological risks associated with emerging contaminants(ECs)in the Beijiang drinking water source,non-targeted screening was conducted using the ultra-high performance liquid chromatography-mass spectrometry technique(UPLC-MS)for one year(June 2022 to May 2023).This study also involved the quantitative detection of eight typical ECs.The results showed that through the non-targeted screening,a total of 346 pollutants were identified,with industrial materials,pharmaceuticals,and pesticides being the predominant pollutants,collectively accounting for 88.2%.Concentrations of eight representative ECs ranged from n.d(undetected)to 180 ng·L^(-1),with detection rates exceeding 80%for six of them.Notably,higher concentrations were found in endocrine disruptors such as bisphenol A(BPA)and 4-nonylphenol(4-NP),along with the pesticides atrazine(ATZ)and propisochlor(PPS),with median concentrations ranging from 8.12 to 35.58 ng·L^(-1).The concentrations of ATZ,PPS,roxithromycin(ROX),and ibuprofen(IBU)were significantly higher in the spring season compared to those in other seasons(P<0.05).Elevated ecological risk levels(RQ>1)were observed at sampling point 1(S1)and sampling point 3(S3)for ATZ and Lomefloxacin(LOM),while for 4-NP,it was determined to be high only at sampling site 2(S2).Given their high detection rates and ecotoxicity,particular attention should be paid to ATZ and 4-NP.The concentration level of ATZ exhibited significant seasonal variation due to its agricultural origin,so it is recommended to strengthen control during spring.Overall,this research provides critical insights into a comprehensive understanding of the presence and impact of ECs in this specific region.

关 键 词：饮用水源水 非靶向筛查 新污染物(ECs) 生态风险评估 季节变化 

分 类 号：X522[环境科学与工程—环境工程]