甲氧氯的水质基准、沉积物质量基准及生态风险评价  

Research on water quality criteria,sediment quality criteria and ecological risk assessment of methoxychlor

作　　者：杨虎成 肖宇煌 莫春雷 高杰 蔡爱民 张泽涛 常亮 易春瑶 Yang Hucheng;Xiao Yuhuang;Mo Chunlei;Gao Jie;Cai Aimin;Zhang Zetao;Chang Liang;Yi Chunyao(Hubei Key Laboratory of Resources and Eco-Environment Geology(Hubei Geological Bureau),Wuhan 430034,P.R.China;Geological Environmental Center of Hubei Province,Wuhan 430034,P.R.China)

机构地区：[1]资源与生态环境地质湖北省重点实验室(湖北省地质局),武汉430034 [2]湖北省地质环境总站,武汉430034

出　　处：《湖泊科学》2024年第2期443-451,共9页Journal of Lake Sciences

基　　金：湖北省地质局科技项目(KJ2023-19);湖北省科技厅地质创新发展联合基金项目(2023AFD223)联合资助。

摘　　要：甲氧氯(methoxychlor,MXC)作为一种有机氯杀虫剂,由于在农业生产中的广泛应用,使其在水环境和沉积物中的检出频率均较高,并且对各种水生物种均具有毒性作用。因此,制定中国MXC水质基准(water quality criteria,WQC)和沉积物质量基准(sediment quality criteria,SQC),并开展生态风险评估,对保护中国水生生物至关重要。基于收集和筛选的17种水生生物的急性毒性数据和10种水生生物的慢性毒性数据。选取物种敏感性分布(species sensitivity distribution,SSD)模型的最佳拟合对WQC进行推导,MXC对水生生物的短期水质基准(SWQC)和长期水质基准(LWQC)分别为0.75和0.11μg/L。通过相平衡分配法,在WQC的基础上进一步推导出SQC,沉积物质量基准高值(SQC-H)和沉积物质量基准低值(SQC-L)分别为0.73和0.11 mg/kg。此外,通过收集中国地表水和沉积物中的MXC暴露浓度数据,利用风险商值法(risk quotients,RQ)进行生态风险评价,结果表明我国部分区域的地表水和沉积物存在一定的生态风险。本文的结果将为中国水生生物保护和降低MXC生态风险提供有价值的参考。As an organochlorine pesticide,methoxychlor(MXC)has been widely used in agriculture,resulting in a high frequency of detection in both the aquatic and sediment environment,and has toxic effects on aquatic species.Therefore,it is critical and necessary to derive Chinese MXC water quality criteria(WQC)and sediment quality criteria(SQC),and perform the ecological risk assessment for protecting aquatic organisms.The acute toxicity data of 17 aquatic organisms and the chronic toxicity data of 10 aquatic organisms were obtained through collection and screening.The best fit of the species sensitivity distribution(SSD)model was selected to derive the WQC,the short-term WQC(SWQC)and long-term WQC(LWQC)of MXC for aquatic organisms were 0.75μg/L and 0.11μg/L,respectively.Furthermore,the SQC was derived based on WQC by using the phase-equilibrium partitioning method.The resulting SQC-low(SQC-L)and SQC-high(SQC-H)were 0.73 mg/kg and 0.11 mg/kg,respectively.Moreover,the exposure concentration data of MXC in surface waters and sediments were collected,the ecological risk was evaluated by using risk quotients(RQ)method.The result showed that there were certain MXC ecological risk in surface water and sediments.The work will provide a valuable reference for protecting aquatic organisms and minimizing MXC ecological risk in China.

关 键 词：甲氧氯 水质基准 沉积物质量基准 生态风险 

分 类 号：X52[环境科学与工程—环境工程] X826