Characteristics and Risk Assessment of Heavy Metal Contamination in Yuncheng Salt Lake Wetland Soil
This study investigates the status of heavy metal pollution in the soils of Yuncheng Salt Lake Wetland.In April 2023,surface soil samples from the area were collected and analyzed for eight heavy metals,namely arsenic(As),cadmium(Cd),zinc(Zn),lead(Pb),chromium(Cr),copper(Cu),nickel(Ni),and mercury(Hg).Utilizing the potential ecological risk index method and a health risk model,we evaluated both the ecological and health risks posed by soil heavy metals,providing valuable insights for local environmental management,ecological restoration,and human health risk mitigation.The findings indicate that the wetland's surface soil is strongly alkaline,with the average concentrations of the eight studied heavy metals ranking as follows:Zn＞Cr＞Pb＞Cu＞Ni＞As＞Hg＞Cd,where Zn and Cr together constitute over 53.21％of the total.The spatial distribution of these metals in the soil shows minimal variation,with the highest concentrations found in the southern part of the study area.According to national soil quality benchmarks,both the individual and combined potential ecological risks in the area are deemed minor.Moreover,the analysis suggests no carcinogenic risk to either adults or children from exposure to these heavy metals.However,while the non-carcinogenic risk from individual metals is considered acceptable,exposure to combined metals could present a non-carcinogenic risk to children.
heavy metalswetland soilpollution characteristicsrisk assessment
NETL
NSTL
万方数据
