Screening Plant For Repair Heavy Metal Contaminated Soil In Coal Mine Reclamation District

In this paper, the reclamation areas of Yuyang and Yushuwan were treated as the study objects.Research the distribution of Cd, Cr, Cu, Fe, Ni, Pb and Zn in different woody. Screening outthe remediation of heavy metal polluted soil of dominant tree species. Conclusions are asfollows:1. According to the soil environmental quality standards in China (GB156181995), two minesoil Cr、Cu and Pb in line with national secondary standard, Cd and Ni conform to thenational three standard. In Yuyang coal mine soil Zn reached the national standard grade two.In Yushuwan mine soil Zn is more than three standard.2. Distribution of heavy metals in plants showed. Five species of plants incomparison.Content in five species of Fe and Zn were high. The content of Fe were315.6mg/kg~978.57mg/kg. The content of Zn were197.74mg/kg~349.11mg/kg.Accumulation of Ni in the five kinds of plants were less. The content of Ni were7.01mg/kg~16.59mg/kg. Cd and Cr contents in the willow and poplar were more than otherplants. The contents of Cu and Ni in pine were higher than other plants which were56.3mg/kg and16.41mg/kg content. The contents of Pb in sand sagebrush and salixmongolica were higher than other plants which were18.05mg/kg and20.49mg/kg.3. Willow, poplar and pine trees in different parts have different content of heavy metals. Mostof heavy metals mainly accumulated in the leaves and branches of willow and poplar. OnlyCu mainly accumulated in the poplar trunks. Cd, Cr, Fe, Pb and Zn mainly accumulated in thepine branches and trunks. Cu and Ni mainly accumulated in the pine leaves.4. Sand sagebrush and salix mongolica enrichment ability of Zn was strong. Poplarenrichment ability of Cd was strong. They can be used as Zn and Cd repair in soil plantpreferred advantage. Sand sagebrush and salix mongolica have the ability to accumulate Cd、Cu、Fe and Pb. Willow has the ability to accumulate Cd、Cr、Fe and Zn.Poplar has the abilityto accumulate Cr and Zn. Pine Cu, Fe and Zn. They can be used as the dominant plants to repair different heavy metal contaminated soil.