茅洲河清淤后表层底泥及水体中PAEs的分布特征及风险评价  

Distribution Characteristics and Risk Assessment of Surface Sediments and PAEs in Water After Dredging in Maozhou River

作　　者：姬亚朋 汤维明 易升泽 JI Yapeng;TANG Weiming;YI Shengze(Power China Eco-Environmental Group Co.,Ltd.,Shenzhen 518100,China)

机构地区：[1]中电建生态环境集团有限公司,广东深圳518100

出　　处：《水资源开发与管理》2024年第8期1-10,15,共11页Water Resources Development and Management

基　　金：深圳市科技创新委员会技术攻关面上项目(JSGG20201103094600001);中国电力建设股份有限公司重点项目(DJ-ZDXM-2019-30)。

摘　　要：为查明茅洲河清淤后表层底泥及水体中酞酸酯类物质(PAEs)的污染情况和风险水平,从茅洲河前期相关研究的采样断面中优选了36个采样点,分析了6种PAEs的污染水平,探讨了PAEs污染来源,并开展了健康风险评价。结果表明,清淤后表层底泥未检测出DMP,底泥中Σ6PAEs含量为450~890μg/kg,水体中Σ6PAEs含量为0.56~1.75mg/L,从检出率及检出量来看,DEHP、DBP是清淤后底泥及水体中PAEs主要组成部分。主成分分析结果表明,PAEs污染主要来源于个人护理品、塑料制品、生活垃圾和电路板制造行业废弃物;茅洲河底泥PAEs的污染水平相对较低,为低风险级别;水体中PAEs的HI均远远小于1,不会对人体健康产生明显的危害,但PAEs会在河道底泥中长期积存,仅一次彻底清淤无法根除,需要建立长效清淤工作机制,高度重视城市河道中新污染物的危害。In order to investigate the pollution status and risk levels of phthalate esters(PAEs)in surface sediments and water after dredging in Maozhou River,36 sampling points are selected from previous relevant studies.The pollution levels of six PAEs are analyzed,the sources of PAEs pollution are explored,and a health risk assessment is conducted.The results show that after dredging,dimethyl phthalate(DMP)is not detected in surface sediments,and the content ofΣ6PAEs in sediments ranges from 450 to 890μg/kg,while in water it ranges from 0.56 to 1.75mg/L.DEHP and DBP are the main components of PAEs in sediments and water after dredging,judging from the detection rate and quantity.Principal component analysis indicates that PAEs pollution mainly originates from personal care products,plastic products,household waste,and circuit board manufacturing industries.The pollution level of PAEs in Maozhou River sediments is relatively low,indicating a low-risk level.The hazard index(HI)of PAEs in water is far less than 1,indicating no significant harm to human health.However,PAEs could accumulate in river sediments for a long time and cannot be eradicated by a single thorough dredging,requiring the establishment of a long-term dredging mechanism and heightened attention to the hazards of new pollutants in urban rivers.

关 键 词：茅洲河 清淤工程 新污染物 酞酸酯 污染水平 风险评价 

分 类 号：TV85[水利工程—水利水电工程]