Abstract:The leaching liquid of four biomass materials including Fatsia japonica, Hovenia acerba, Alternanthera philoxeroides and Polygonum runcinatum were investigated by batch soil washing experiments. Cd removal efficiencies of four biomass materials varied obviously, and their removal efficiencies increased consistent with logarithm, power function or multiplicative inverse with growing concentrations. From 4 to 9 of solution pH, the removal efficiency linearly increased for the P. runcinatum. However, it dropped in liner change, multiplicative inverse or power function respectively for the other three materials. Fitting data between contact time and removal amount were better curved the pseudo second order kinetics (R2>0.994) and Elovich model (R2>0.803). Liquid to soil ratio increment would improve the removal efficiency. The optimal removal efficiency reached 78.31%, 53.88%, 47.59% and 27.98% respectively when successive washed for three times. In addition, Cd fractions of exchangeable, carbonate and organic matter were decreased (P<0.05). Except soil potassium slightly increased (1.69%–13.13%), other soil nutrients and soil organic matter were decreased by less than 19.59%. Additionally, residues after leaching could adsorb Cd from waste water which was accord with national wastewater emission standard. Therefore, considering both efficiency and influence on soil properties, F. japonica could be a promising Cd removal material.