Speciation Distribution and Influencing Factors of Heavy Metals in Rhizosphere Soil of Miscanthus Floridulus in the Tailing Reservoir Area of Dabaoshan Iron Polymetallic Mine in Northern Guangdong

Through field investigation and experimental analysis, the forms, contents distribution of heavy metals (Zn, Pb, Cu, Cd, Ni, Cr) in rhizosphere non-rhizosphere soils Miscanthus floridulus growing everywhere Tielongwei mine pond (sample plot 1), Caoduikeng tailings 2), Donghua 3) Small 4) Dabaoshan, Guangdong Province were studied. The results showed that main forms distributions are basically same, which shows mineral content accounts for most total amount metals, while exchange is low. Compared with soil, proportion exchangeable organic soil increased significantly, organic-bound Cu by 53.25%, Cd Pb more than 17%, Zn 5.67%. At same time, carbonate-bound iron manganese oxide-bound decreased. Statistical analyses morphological Zn, Ni Cr was closely related to pH value, matter content, plant growth other factors. this study provided a basis restoration metal-contaminated sites Miscanthus.