Assessment of Contamination,Source Analysis and Ecological Risk for Heavy Metals in Beida River Sediments of Jiuquan City
In this paper,surface sediments of the Beida River in Suzhou District,Jiuquan,a typical arid zone oasis in the west of the river was collected,and the pollution characteristics,sources and ecological risks of five heavy metals(As,Cd,Cr,Pb and Hg)in the sediments based on correlation analysis,principal component analysis,geo-accumulation index and potential ecological risk index was studied.The results showed that the concentration of each heavy metal was lower at the junction of Jiayuguan and Jiuquan and the junction of Yinda and Quanhu,and higher at the confluence area of the wastewater plant and the entrance of Yuanyang Pond.Cd,Cr,Pb and Hg were mainly from some industrial production and WWTP,and As was a natural source.There was no As and Cr pollution in the whole area of the river,but there were slight Cd,Hg and Pb pollution,among which Cd and Hg had greater potential ecological risk,and the control of Cd and Hg should be paid attention to in the process of river pollution prevention and control.This study reveals the status of heavy metal pollution in the sediments of the Beida River in Jiuquan,the main types of pollutants and their sources,and provides a focus and direction for river sediment management.
万方数据
维普
