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研究了松嫩平原南部红土母质、黄土母质黑钙土0~20 cm、20~40 cm、40~60 cm层深的土壤对锌的吸附-解吸特性。结果表明:土壤对锌的吸附量与平衡液浓度成正比,且土壤的基本理化性质会影响其对锌的吸附能力。其中Freundlich方程拟合程度最好,其次为Langmuir方程,Temkin方程的拟合度相对较低,相关系数分别均>0.99、0.96、0.94。土壤对锌的解吸量与吸附量成正比,不同土层土壤对锌的解吸能力不同。在同一平衡液质量浓度条件下,红土母质黑钙土1和黄土母质黑钙土1在0~20 cm层深土壤对锌的吸附强度最大,红土母质黑钙土2和黄土母质黑钙土2在20~40 cm层深土壤对锌的吸附强度最大。
The adsorption and desorption characteristics of zinc in soil of 0 ~ 20 cm, 20 ~ 40 cm and 40 ~ 60 cm of loam parental and loess parental chernozem in southern Songnen Plain were studied. The results showed that the amount of zinc adsorbed by the soil was proportional to the concentration of the equilibrium solution, and the basic physical and chemical properties of the soil affected the adsorption capacity of zinc. The Freundlich equation fitted best, followed by the Langmuir equation, the fitting degree of Temkin equation was relatively low, the correlation coefficients were> 0.99, 0.96, 0.94 respectively. Soil desorption amount of zinc is proportional to the amount of adsorption, soil desorption capacity of different soil zinc. Under the same equilibrium liquid mass concentration, the adsorption strength of zinc on red soil parent Chernozem 1 and loess parent Chernozem 1 in 0 ~ 20 cm deep soil was the highest, while that of red soil parent Chernozem 2 and loess parent Chernozem 2 In 20 ~ 40 cm deep soil zinc adsorption strength of the largest.