PVC-MnO2的制备及其对锂离子的吸附行为  

Preparation of PVC-MnO2 and its adsorption behavior to Li ion

作　　者：王宏岩 黄凯[1] 张玉生 郑诗礼[2] 张懿[2] 李平[2] Hongyan WANG;Kai HUANG;Yusheng ZHANG;Shili ZHENG;Yi ZHANG;Ping LI(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijng 100083, China;National Engineering Lab for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;Shandong Steel Jisteel Alloy Technology Co., Ltd., Jinan, Shandong 250000, China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [3]山东钢铁济钢合金科技有限公司,山东济南250000

出　　处：《过程工程学报》2018年第4期821-827,共7页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51574212,U1403195)

摘　　要：Mn CO3和Li2CO3经高温煅烧合成Li4Mn5O12,再与聚氯乙烯（PVC）和N,N-二甲基甲酰胺溶液混合,干燥、酸洗后制得粒径3？4 mm的多孔球形PVC-Mn O2锂离子筛,用其吸附Li离子.结果表明,PVC-Mn O2吸附Li离子的反应符合Langmuir方程和拟二级动力学方程,吸附焓变为0.358 k J/mol,吸附反应为吸热反应,Li离子最高吸附量可达23.4 mg/g.MnCO_3 and Li_2CO_3 as raw materials were mixed and calcined to prepare Li4 Mn5 O12 powders, which was further added into the polyvinyl chloride（PVC） and N,N-Dimethylformamide（DMF） solutions to form suspensions. The suspensions were dried and acid-washed to obtain spherical PVC-MnO_2 with 3~4 mm size. PVC-MnO_2 was used to adsorption Li ion. The results showed that the adsorption of Li ion onto PVC-Mn O2 followed the Langmuir isotherm model and the pseudo-second order kinetic equation. The enthalpy change（0.358 k J/mol） was positive indicating the adsorption of Li ion onto PVC-MnO_2 was an endothermic reaction, and the maximum adsorption capacity of Li ion was 23.4 mg/g.

关 键 词：PVC-MnO2锂离子筛 吸附 动力学 

分 类 号：TQ028[化学工程]