| As an ecosystem with various functions and rich resources, coastal wetland is one of the most important living environments for human beings. Heavy metal pollution in wetland soil is a hot topic in the field of wetland science. In order to study the characteristics of heavy metal pollution in soil of Luannan coastal wetland in Hebei Province, evaluated by single factor index method, comprehensive pollution index method and local accumulation index method. The results show that the single factor mass index Cu, Zn, Cr, Pb and Cd are all less than 1.0, which indicates that the content of heavy metals in this area is within the soil background value and the soil is not contaminated. The composite index of Cu, Zn, Cr, Pb and Cd are all less than 0.7. The results show that the heavy metal pollution level in luannan wetland is unpolluted. The accumulation index of heavy metal land in each area of the wetland is no pollution or relatively light pollution, among which Pb pollution is relatively light pollution, and the monitoring points are mainly related to human activities. According to the land accumulation index, Pb is mildly polluted in the north area of the wetland. After investigation, it is found that this area is mainly a famous point, with frequent human activities and no pollution of other heavy metals. The soil of Luanhe River wetland in Hebei is not polluted by heavy metals, and the wetland soil environment is good. |
