城市地表水重金属污染特征及风险评价  

Characteristics and Risk Assessment of Heavy Metal Pollution in Urban Surface Water

作　　者：陈莎莎 Chen Shasha(Guangdong Yifang Environmental Protection Technology Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广东一方环保科技有限公司,广东广州510000

出　　处：《皮革制作与环保科技》2022年第17期139-142,共4页Leather Manufacture and Environmental Technology

摘　　要：为了对广东某区域地表水的重金属污染情况进行调查,本研究在该区域地表水中选择了45个点位进行取样,测试其重金属含量。相关性分析和主成分分析显示,Ni和Cr具有显著的相关性,Ni和Pb,Ni和Zn,Zn和Pb也具有较高的相似性。该区域地表水中重金属的综合评价指数和潜在生态风险指数都属于轻微污染范围。本文经过计算地表水中重金属元素的健康风险指数,发现本次研究的7种元素的含量所造成的单项非致癌风险以及综合非致癌风险低于风险限值1×10^(-6),致癌风险系数高于最低限值,但是未达到显著风险标准,这在一定程度上可以接受。其中Cr6+在致癌风险中占据了主导地位,另外儿童由于其生理特征,更容易受到非致癌风险和致癌风险的影响。In order to describe the heavy metal pollution in surface water in a certain area of Guangdong,10 points were selected for sampling in the surface area of this area,and the content of heavy metals was tested.The concentration of Cu element is higher than other typical cities.Correlation analysis and principal component analysis show that Ni and Cr have significant correlation,Ni and Pb,Ni and Zn,Zn and Pb also have high similarity.The comprehensive evaluation index and potential ecological risk index of heavy metals in the surface water of this region belong to the scope of slight pollution.The health risk results of heavy metals in Nanjing surface water show that the non-carcinogenic risk and total non-carcinogenic risk of seven heavy metals are far lower than the risk limit of 1×10^(-6) recommended by the international environmental protection agency,while the carcinogenic risk is higher than this limit.However,it is lower than the sigmficant risk limit,which is in the acceptable risk range,in which hexavalent Cr^(6+) plays a leading role in carcinogenic risk,and children are more susceptible to non-carcinogenic and carcinogenic risks due to their physiological characteristics.

关 键 词：重金属 地表水 风险评价 分布特征 

分 类 号：TS5[轻工技术与工程—皮革化学与工程]