高岭土对钙离子的吸附特性研究.PDFVIP

第4卷 第12期 864 中国科技论文在线 Sciencepaper Online 2009 年 12 月 高岭土对钙离子的吸附特性研究 宋玲玲，冯 莉，苟远诚，阮继政 （中国矿业大学化工学院，江苏徐州 221008 ） 摘 要：采用静态吸附的方法考查了吸附时间、温度、Ca2+浓度、吸附剂浓度和振荡强度等因素对高岭土吸附Ca2+ 的 影响，研究了Ca2+在粘土颗粒表面的吸附特性。研究表明：高岭土对的Ca2+ 吸附过程分 2 个阶段，快速吸附和缓慢吸 附，并且随温度的升高吸附平衡时间缩短；该吸附过程的最适温度在 20 ℃左右；随吸附剂浓度升高，平衡吸附量减 小，直至达到平衡；实验范围内，随振荡速度增大，平衡吸附量增加。 关键词：高岭土；钙离子；吸附 中图分类号：X703 文献标识码：A 文章编号：1673－7180(2009)12 －0864 －4 2+ Adsorption prorerties of Ca kaolin Song Lingling ，Feng li ，Gou Yuancheng ，Ruan Jizheng (School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China) Abstract: The adsorption properties of calcium ions on kaolin under the influences of adsorption time, temperature, calcium ions concentration, adsorbent concentration, and surging intensity were studied by static experiments. The result indicates that the adsorption process was departed into two stages , rapid and slow adsorptions, and the adsorption equilibrium time was shortened with the temperature rising; the optimum temperature of this process was around 20 ℃；the adsorption equilibrium capacity was reduced with the concentration of adsorbent rising, until up to an equilibrium; in the experimental context, the adsorption equilibrium capacity increases with the Rotate-speed rising. Key words: kaolin ；calcium ions ；adsorption 少报道[3-6] ，但是粘土对钙离子的吸附研究不多。本文研 0 引 言 究了吸附时间、吸附剂的浓度、混凝剂的浓度、温度、 高岭土等粘土矿物是造成煤泥水难沉降的主要原 振动强度等因素对粘