生态与农村环境学报2025，Vol.41Issue(4)：483-495,13.DOI:10.19741/j.issn.1673-4831.2024.1026
资源型城市河流无机污染物来源解析及健康风险评价:以马鞍山市为例
Source Apportionment of Inorganic Pollutants and Health Risk Assessment in Rivers of Resource-Based Cities:A Case Study of Ma'anshan City
摘要
Abstract
Anthropogenic activities such as mining operations have significantly increased the input of inorganic pollutants(e.g.,heavy metals)into aquatic environments,exacerbating surface water quality degradation in downstream cities.This has led to regional water environmental issues and poses potential risks to ecological livability and human health in beauti-ful city construction,particularly in metal-mining areas.Taking the typical resource-based city of Ma'anshan as a case study,this research analyzed the distribution,sources and potential health risks of inorganic pollutants in Caishi River and Cihu River,and evaluated the uncertainty of potential health risks using Monte Carlo simulation.The results indicate rela-tively low overall pollution levels in both rivers.The average exceedance rates for total nitrogen(TN)and sulfate were 35％and 74％,respectively.The maximum detected concentrations of heavy metals Cu,As and Ni were below the class Ⅲwater quality standards(GB 3838-2002),except for Hg,which exceeded the standards in 90％of samples and became the main contributor to heavy metal pollution indices.The Positive Matrix Factorization(PMF)model identified five sources:smelting activities(19.8％),regional geological environment(16.5％),mixed agricultural activities and urban sewage(24.3％),water-rock interactions from geological strata(19.4％),and agricultural activities(20.0％).For con-trolling human health risks from surface water,priority should be given to the control of the sources from agricultural activi-ties and urban sewage rather than from mining activities.Non-carcinogenic health risks from surface water exposure were negligible.However,carcinogenic heavy metal As was the main contributor to carcinogenic health risks,which were not negligible.Carcinogenic Risk(CR)values for 23％-28％of adults and and 50％-55％of children exceeded the accepta-ble threshold of 0.0001 indicating relatively high probabilistic risks.Exposure duration and As concentration were the lar-gest positive contributors to the CR.It is recommended that As and Hg be prioritized as key indicators for monitoring dis-solved heavy metals in surface water,with additional attention paid to regulating and managing exposure duration and As concentration for health risks mitigation.关键词
地表水/无机污染物/污染源解析/概率健康风险Key words
surface water/inorganic pollution/source apportionment/probabilistic health risk分类
环境科学引用本文复制引用
吕玉娟,孙静怡,姚国慧,戴逸姝,李海东..资源型城市河流无机污染物来源解析及健康风险评价:以马鞍山市为例[J].生态与农村环境学报,2025,41(4):483-495,13.基金项目
国家自然科学基金(72174127,42107098) （72174127,42107098）
生态环境部南京环境科学研究所创新团队建设项目(ZX2023QT006) （ZX2023QT006）
