摘要
利用kegg in离子对蒙脱石进行柱撑制得聚羟基铝柱撑蒙脱石,研究柱撑蒙脱石对Cu2+,Cd2+,C r3+3种重金属离子的吸附。结果表明:未经焙烧的柱撑蒙脱石对Cu2+,C r3+离子的吸附性要比原矿好,而经400℃下焙烧的柱撑蒙脱石对Cd2+则有更好的吸附性。用腐殖酸对柱撑蒙脱石改性能提高柱撑蒙脱石对3种重金属离子的吸附性能,柱撑蒙脱石对3种重金属离子的吸附量都随pH值的升高而增加。另外还对柱撑蒙脱石对3种重金属离子的吸附动力学进行了研究,发现其动力学吸附过程可用E lov icb方程和一级动力学方程进行较好的拟合。
In this paper, the hydroxyl-Al pillared montmorillonite was prepared by Al^3＋ in keggin ions and the adsorption of Cu^2＋ ,Cd^2＋ ,Cr^3＋ on the hydroxyl-Al pillared montmorillonite was studied, it shows that hydroxyl-Al pilled montmorillonite which was not calcined has higher adsorption capacity than unpillared montmorillonite,while the hydroxyl-Al pillared montmorillonite calcined at 400 ℃ has high adsorption capacity than Cd^2＋. The study also shows that humic acid can modify the hydroxyl-Al pillared montmorillonite and improve its adsorption capacity. The adsorption amount of the three kinds of heavy metal ions increased with the rise of pH. This paper also studied the kinetic characteristics of the three kinds of heavy metal ions on hydroxyl-Al pillared montmorillonite,and found that Elovicb equation and One-level kinetic equation can describe the kinetic characteristics very well.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第3期122-126,共5页
Mineralogy and Petrology
基金
国家自然科学基金(40202007)
广东省自然科学基金(020938
04020017)
关键词
吸附
聚羟基铝柱撑蒙脱石
重金属
腐殖酸
动力学
adsorption
hydroxyl-Al pillared montmorillonite
heavy metal
humic acid
kinetics
