The effects of organic matter, free Fe oxides and Mn oxides in an alluvial soil on adsorption of Cd were studied through selective chemical extraction and adsorption experiments. Compared to untreated soil, after H₂O₂ treatment for removal of organic matter and NH₂OH·HCl treatment for removal Mn oxides, the distribution coefficient (K_d) decreased by a maximum of 25.2% and 64.1%, respectively. After dithionite-citrate-bicarbonate treatment for removal of free Fe oxides, K_d increased by 1670.2%. After increasing the solution pH from 2 to 3, K_d increased by 2842.1%, whereas after increasing the solution pH from 3 to 7, the adsorption tended stabilize. As the ionic strength increased from 0.001 M to 0.1 M NaNO₃, K_d gradually decreased, whereas at the same ionic strength, K_d decreased as the initial concentration of Cd increased. The effects of different background electrolytes on Cd adsorption was as follows: Ca²⁺ > Mg²⁺ > K⁺ > Na⁺ for cations and Cl⁻ ≈ SO₄²⁻ > NO₃⁻ for anions. The adsorption capacity of Cd increased as the increased of temperature, and it's a spontaneous endothermic process. The pseudo second-order rate model described the process of Cd adsorption well.

通过选择性化学提取和吸附实验研究了冲积土壤中有机质，游离Fe氧化物和Mn氧化物对Cd吸附的影响。与未经处理的土壤相比，经过H ₂ O ₂处理去除有机物和NH ₂ OH·HCl处理去除Mn氧化物后，分配系数（K _d）分别下降了25.2％和64.1％。在用柠檬酸二氢盐-连二亚硫酸盐处理以除去游离的Fe氧化物后，K _d增加了1670.2％。将溶液的pH从2增加到3后，K _d增加了2842.1％，而在将溶液的pH从3增加到7之后，吸附趋于稳定。随着离子强度从0.001 M NaNO ₃增加到0.1 M NaNO ₃，K _d逐渐降低，而在相同离子强度下，K _d随着Cd初始浓度的增加而降低。不同的背景电解质的对Cd吸附性能的影响如下：钙²⁺  > Mg的²⁺  >ķ ⁺  >的Na ⁺为阳离子和Cl ^-  ≈SO ₄ ^2-  > NO ₃ ^-阴离子。Cd的吸附容量随温度的升高而增加，这是一个自发的吸热过程。伪二级速率模型很好地描述了镉的吸附过程。