钠基蒙脱石对Cu^(2+)的吸附研究  

Study on Adsorption of Cu^(2+) with Na-montmorillonite

作　　者：赵徐霞 庹必阳[1,2,3] 韩朗 龙森[1] Zhao Xuxia1, Tuo Biyang1,2,3, Han Lang1 ,Long Sen1(1. School of Mining, Guizhou University, Guiyang 550025, China ;2. Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic mineral resources, Guiyang 550025, China ;3. National ＆ Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, Chin)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [3]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025

出　　处：《金属矿山》2018年第3期182-186,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51464007);贵州省科技厅联合资金项目(编号:黔科合LH字[2015]7684);贵州大学博士基金项目(编号:贵大人基合字(2013)51号)

摘　　要：为了寻找高效、低成本、无二次污染地解决重金属离子污染问题的方法,以提纯钠化后的蒙脱石(Namnt)为吸附剂,在对其进行性能表征的基础上,进行了Cu^(2+)吸附试验,考察了Cu^(2+)初始浓度、溶液的初始pH、吸附温度及吸附时间对Cu^(2+)吸附的影响,并通过Langmuir、Freundlich等温吸附模型及动力学方程从热力学与动力学角度分析了Na-mnt对Cu^(2+)的吸附机理。结果表明:Na-mnt对Cu^(2+)的吸附平衡数据符合Langmuir等温模型,吸附过程是一个非自发的放热反应过程,吸附过程符合拟二级动力学方程。In order to find a way to solve the problem of heavy metal pollution with high efficiency,low cost and no pollution,and with the sodium montmorillonite （Na-mnt） after purification and Na-modification as adsorbent,the Cu2＋ adsorption experiments were carried out based on analyzing its characteristics. Influences of Cu2＋ initial concentration, initial pH of solution, adsorption temperature and adsorption time on Cu2＋ adsorption performance were investigated. The adsorption mechanism of Na-mnt on Cu2＋ was analyzed through the isotherm adsorption model of Langmuir and Freundlich and the kinetic equations from views of the thermodynamics and the kinetics. The results showed that the adsorption equilibrium data of Cu2＋ on Na-mnt conforms to the Langmuir isothermal model. The adsorption process is a non-spontaneous exothermic reaction process, which conforms to the pseudo-second-order kinetic equation.

关 键 词：钠基蒙脱石 CU2+ 动力学 热力学 吸附 

分 类 号：X751[环境科学与工程—环境工程]