Pollution Characteristics and Ecological Risk Assessment of Heavy Metal in the Coast Sediments along Power Plant-Sanshimu Village of Yangzong Lake, Yunnan Province

Abstract

To explore the current situation of heavy metal pollution in Yangzong Lake areas, the contents of Cu, Zn, Ni, Cr, Fe, Mn, V, Mo, Co, Sr, Li, Be, Cd, As, Pb, Al, Ba and Ti in 40 coast sediment samples along Power Plant-Sanshimu Village were determined. Single factor pollution index, enrichment coefficient and geoaccumulation index were used to evaluate the heavy metal pollution. The results showed that concentrations of Cu, Cr, Co and Be in all samples exceeded their natural background values. The average concentrations of Co, Cd, Cu, Be, Cr, Mo, V, As, Ni, Li, Zn, Mn, Sr and Fe were higher than their natural background values, while Pb, Al, Ba and Ti were opposite. Co, Cd, and Cu were the highest degree of pollution, followed by Be, Cr, Mo and V. Potential ecological risk index indicated a moderate-strong ecological risk. Cd, Co, As and Cu were the main ecological risk factors in this region.