粉煤灰对酸性矿井水中Cd^(2+)的吸附动力学研究  

Adsorption kinetics of Cd^(2+) in acid mine water on fly ash

作　　者：徐建平[1] 郑仲[1] 朱明明[1] 

机构地区：[1]安徽工程科技学院生化工程系,安徽芜湖241000

出　　处：《煤炭学报》2007年第11期1183-1186,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50374001);安徽省科技厅重点科研计划资助项目(04023047)

摘　　要：分析研究了粉煤灰对模拟酸性矿井水中Cd2+的吸附.实验中选取Cd2+的初始浓度为0.000 1~0.010 0 mol/L.结果表明,粉煤灰对Cd2+的吸附符合Freundlich型吸附等温式,吸附反应符合一级反应动力学特征.在不同温度下得到了速率常数方程,表观活化能Ea=28.95 kJ/mol,指前因子A=68.9 min-1.Studied the Cd^2＋ adsorption of fly ash in simulated acidic mine water. The initial concentration of Cd^2＋ ranged from 0. 000 1 to 0. 010 0 mol/L, and the experimental results show that the adsorption of Cd^2＋ with fly ash is consistent with an adsorption isotherm of the Freundlich type equation. Such an adsorption reaction confirms the first-order reaction kinetics. The rate constant equation and apparent activation energy Ea = 28.95 kJ/mol, the preexponential factor A = 68. 9 min^- 1 may be obtained for different temperatures.

关 键 词：粉煤灰 酸性矿井水 CD^2+ 吸附动力学 

分 类 号：TQ536.9[化学工程—煤化学工程]