摘要
选用钠基蒙脱石和叶蜡石两种粘土矿物吸附水中的铜离子,研究了pH值、铜离子初始浓度和时间对吸附效果的影响。所得的热力学数据与等温线方程模拟,发现这两种矿物吸附铜离子的模型均较符合朗缪尔模型,说明在粘土矿物的表面吸附位点基本上是相同的。将动力学数据与几种动力学方程进行模拟,发现粘土矿物吸附铜离子的动力学更好的符合二级动力学模型,说明吸附速率不仅跟吸附质的浓度有关,也跟吸附剂的浓度有关。
Two clay minerals, sodium montmorillonite and pyrophyllite, were used to study the adsorption of copper ions in aqueous.The pH value, initial Cu(Ⅱ) concentration and reaction times were studied.The isotherm data was simulated with isotherm equations and the data was in line with the Langmuir model, which showed that the surface of clay mineral adsorption sites were the same.The dynamic data was simulated with some dynamic equations, it was found that clay mineral adsorption kinetics of Cu(Ⅱ) can better serve the pseudo-second-order model.The adsorption rate was not only related to the concentration of adsorbate, but also related to the concentration of the adsorbent.
作者
石志恒
陈加加
李云霞
褚玉婷
SHI Zhi-heng;CHEN Jia-jia;LI Yun-xia;CHU Yu-ting(Yancheng Institute of Technology,Jiangsu Yancheng 224000,China)
出处
《广州化工》
CAS
2019年第4期51-54,共4页
GuangZhou Chemical Industry
基金
2018年大学生创新项目资助(氨基酸改性膨润土吸附水中的重金属离子研究)
国家自然科学基金项目资助(51572130)
关键词
钠基蒙脱石
叶蜡石
吸附
铜离子
sodium montmorillonite
pyrophyllite
adsorption
copper ion
