The biochar with different silicon-bearing ratios was prepared by sodium silicate impregnation for Cd pollution in soil,in this process,we did the soil cultivation test and investigated four physicochemical factors,Cd morphologic change and its relativity.Results show:that silicon-modified biochar can obviously improve soil electric conductivity,cation exchange capacity,organic matter,and pH,all of these can decrease Cd content in the commutative state and increase Cd content in the residue state.In the soil added with 4:1SiBC,the Cd content in the commutative state is related to a significant or significantly negative correlation of physicochemical factors,and the Cd content in the residue state is associated with an important or significantly positive correlation of physicochemical factors.The silicon-modified biochar can affect the occurrence morphology distribution of Cd,which can improve the stabilization of Cd in soil.
关键词
硅/生物炭/土壤镉污染/赋存形态/稳定化
Key words
silicon/biochar/cadmium pollution of soil/occurrence morphology/stabilization
维普
万方数据