凹凸棒粘土对金属离子吸附性能的研究

摘要

对凹凸棒粘土吸附金属离子的性能进行了研究，采用氯化铵-无水乙醇法测定凹凸棒粘土的阳离子交换容量为40.44 mmol/(100 g)。探讨了凹凸棒粘土在不同条件下对Cr6+吸附性能的影响。结果表明，凹凸棒粘土对Cr6+吸附的最优化条件为温度30℃、吸附时间30 min、pH为7。在此条件下，凹凸棒粘土对Cr6+、Cu2+、Mn2+、Fe3+的饱和吸附量分别为48.93、32.72、10.22、4.85 mg/g。%The attapulgite clay adsorption properties for heavy mental ions are investigated. The cation exchange capacity(CEC) of the clay is 40.44 mmol/(100 g) tested by the ammonium chloride-anhydrous ethanol method. The effects of different conditions on the adsorption properties of Cr6+are discussed. The results show that optimum conditions are as follows. Adsorption temperature is 30℃, adsorption time is 30 min and the pH is 7. In such condition, the attapulgite clay saturation adsorption capacities for Cr6+、Cu2+、Mn2+、Fe3+are 48.93, 32.72、10.22、4.85 mg/g, respectively.