Distribution characteristics and health risk assessment of metal elements in surface water of Fenhe River Basin
In order to study the characteristics of metal pollution and health hazards in surface water of Fenhe River Basin,this paper took collected 39 water samples from the main branches of Fenhe River basin flowing into the estuary and main stream sections,and detected the content of nine metal elements,including As,Cu,Pb,Zn,Hg,Ni,Mn,Fe and Co.Multivariate statistical analysis and water environmental health risk assessment model were used to evaluate the distribution characteristics of metal elements in surface water and their health hazards to adults and children.The results showed that Hg,Fe and Mn were the main elements exceeding the standard in the study area,and the polluted areas were mainly distributed in the middle and lower reaches and tributaries of the main stream of Fenhe River.The changes of Fe,Mn,Zn and Co in the upper reaches of Fenhe River are large,followed by the middle and lower reache.The content of metal elements in tributaries varies greatly.Multivariate statistical analysis showed that Hg and As mainly came from industrial pollution and agricultural pollution.Pb,Cu,Zn,Ni,Co,Fe and Mn come from industrial and agricultural production and transportation.The health risk evaluation showed that the total health risk of each section of the Fenhe River basin was tributary＞lower reaches＞middle reaches＞upper reaches.The health risk of children through drinking water was 1.15 times that of adults,and children were more vulnerable to metal elements;As was the main carcinogen of Huihe River and Changyuan River;The priority control metal elements in each river reach were As,Co,Pb,Fe and Hg.
Fenhe River Basinsurface watermetal elementsmultivariate statistical analysishealth risk assessment
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