Distribution Characteristics and Risk Evaluation of Heavy Metal in Surface Sediments of Luomahu Lake Basin
This study conducted a assessment of the heavy metal distribution characteristics and potential ecological risks in the surface sediments of the Luomahu Lake Basin.The concentration levels,spatial characterization and source analysis of 10 heavy metals(Cr,Ni,Cu,Cd,Pb,Sb,As,Hg,Be and Tl)during three periods of dry water,flat water and abundant water were analyzed.The potential ecological risk index method was used to evaluate the potential ecological risk of heavy metals in sediments.The results showed that the average concentrations of Ni,Cu,Cd and Pb are higher than the background values of the soil environment in Jiangsu during some water periods,while no point of Hg and Tl exceeds the background values,and the overall heavy metal pollution in the sediments of the Luomahu Lake basin is at a low to medium level compared with other water bodies.the overall individual ecological risk of heavy metals in the sediments is low,except for Cd,and the combined potential risk level of each point is at a medium level or below.Correlation and principal component analyses revealed that the heavy metal pollution primarily comes from industrial and agricultural sources.
Heavy metalsSedimentLuomahu Lake BasinLars Hakanson MethodCorrelation analysisPrincipal component analysis
万方数据
维普
