Analysis of priority control sources of heavy metal pollution in sediments of the lower of Daqing River Basin
In order to explore the impacts of different pollution sources of heavy metals on ecology and human health risk,this paper took the lower of Daqing River Basin as the research object,collected and measured the contents of heavy metals Cu,Pb,Ni and Cr in 36sediment samples,quantified the degree of heavy metal pollution by using the traditional analytical method,analyzed the sources of heavy metal pollution in the sediment by utilizing the Positive Definite Matrix Factor Analysis(PMF).Meanwhile,on the basis of PMF source analysis,combined with heavy metal toxicity and environmental background values,the contribution of pollution sources to ecological and human health risks was quantitatively analyzed by using PMF combined with the potential ecological risk index model(ERI)and human health risk assessment model(HHRA).The results of the single-factor pollution index showed that the four heavy metals Pb,Ni,Cu and Cr were slightly polluted in the study area,using the background value of soil heavy metals in Hebei Province as the standard value.The PMF analysis showed that the sources of heavy metal pollution were industrial sources(43.26%)>agricultural-transportation sources(34.97%)>transportation-natural sources(21.77%).The PMF-ERI showed that traffic-natural sources(39.21%)>Agriculture-transportation sources(34.07%)>Industrial sources(26.72%),and traffic-natural sources were the best control sources of potential ecological risks.The PMF-HHRA showed that industrial sources(43.98%)>Agriculture-transportation source(26.90%)>Traffic-natural sources(29.12%)and industrial sources were the best-controlled sources of human health risks,and Cr was the best control pollutant for human health risks.
lower Daqing River Basinsedimentheavy metal pollutionsource analysissource-specific risk
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NSTL
万方数据
