| Effects of different amendments on corn growth and accumulation of heavy metals were carried on by using pot experiment in greenhouse. The results showed that most of amendment treatments could increase the total fresh weight of corn and fresh weight of shoots. Addition of different amendments could significantly decrease the available content of Cd, Pb, Cu and Zn in soil. Compared to the control treatment, addition of different amendments led to a decrease of available Cd content in soil by 4.8%~16.5%, available Pb by 10.6%~15.5%, available Cu by 4.5%~26.7%, and available Zn by 2.8%~7.6%. Additions of natural bone char, bone char+ red mud and Al2（SO4）3 modified bone char were the most available treatments to decrease the available content of heavy metals in soil. At the same time, concentrations of Cd, Pb, Cu and Zn in shoots and roots of corn decreased by adding most amendments. Compared to the control treatment, all of the amendment treatments decreased the concentration of Cd in corn leaf by 27.5%~62.2%, and the concentration of Pb in corn stem decreased by 46.7%, 55.6%, 59.0% and 74.0% respectively, by adding bone char+red mud, sepiolite, zeolite and natural bone char in contaminated soil. Effects of amendments on the transport of heavy metals by corn were also studied. |
