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本文选用采自新疆阿克苏地区典型的棕漠土壤,用模拟吸附方法研究棕漠土无机胶体在不同阴阳离子作用下对Pb2+的吸附特征,得出:棕漠土无机胶体对铅的等温吸附曲线可以用Langmuir等温方程式很好的拟合,解吸后,铅在胶体内的残余量与加入溶液的浓度呈很好的一次函数关系;随着加入支持电解质浓度的增加,胶体对铅的吸附量逐渐减少;阳离子对土壤无机胶体吸附铅的影响为:K+>NH4+>Na+;阴离子对铅吸附影响为Cl->NO3-。
In this paper, the typical brown desert soil from Aksu region of Xinjiang Autonomous Region was used to study the adsorption characteristics of Pb2 + on the inorganic colloids of the brown desert soil under the action of different anions and cations. The adsorption isotherms of the inorganic colloid of the brown desert soil on Pb After fitting and desorbing with Langmuir isotherm, the residual amount of lead in the colloid shows a good linear relationship with the concentration of the added solution. With the increase of the concentration of the supporting electrolyte, the adsorption amount of lead on the colloid decreases gradually The effect of cation on Pb adsorption on soil inorganic colloid was K +> NH4 +> Na +. The effect of anions on lead adsorption was Cl-> NO3-.