Heavy Metal Pollution and Health Risk Assessment of Surface Soil around Domestic Garbage Site
This study took the surface soil around a garbage dump in a university in Henan as the research object,analyzed the physical and chemical properties of the soil and the content of heavy metals,and evaluated the pollution and health risk of heavy metals in the surface soil.The research results indicated that soil moisture content was related to vegetation coverage,and was not related to the distance of garbage disposal sites.The farther away from the garbage dump,the smaller the total salt content in the soil was.The garbage dump had no direct impact on the total nitrogen and total phosphorus content in the soil.The content of heavy metals As,Cd,Cr,Cu,Ni,Pb,and Zn in the surface soil was lower than the background value of soil in Henan Province.Except for heavy metal Cd,the farther away from the garbage dump,the lower the heavy metal content was.Research has found that being closer to the garbage dump had a certain impact on the heavy metal content in vegetables.Soybean had a strong ability to accumulate heavy metals and was more likely to absorb various heavy metal elements in the soil.According to the analysis using the single factor index method,the region has not yet been contaminated.According to the calculation of the land accumulation index method,the soil heavy metals in the study area were in a pollution-free state.The target hazard coefficient(THQ)of vegetables was all less than 1,indicating that consuming vegetables in this area would not have an impact on human health.This study was of great significance for improving and strengthening campus greening work and ensuring the physical health of teachers and students.
NETL
NSTL
万方数据
