改性凹凸棒粘土对水溶液中铜离子吸附性能的研究

The Study on the Adsorption of Copper Ion on the Modified Attapulgite Clay

研究了改性凹凸棒粘土对水溶液中铜离子的吸附规律.结果表明,5%HCl酸活化和400℃热活化的凹凸棒粘土具有很好的吸附性能,粘土添加量为2%时,铜离子的最高去除率分别达到88.1%和90.4%,铜离子的平衡浓度为100mg·L-1时,粘土的吸附容量分别约为35mg·g-1和37mg·g-1.

The properties of the attapulgite clay were altered by the heat treatment or the acid treatment for improving the adsorption property of clay. The experimental results indicated that the modified clay treated with the acid treatment of 5% HCl or the heat treatment of 400 ℃ had the best adsorption properties, and the removed rates of copper ion from the solution reached 88.1% and 90.4% respectively under the clay addible quantity of 2% and the adsorption capacity of copper ion by the modified clay was equal to 35 mg· g^-1 and 37 mg·g^-1 respectively under the copper balance concentration of 100 mg · L^-1.