凝胶法制备膨润土颗粒与吸附铜离子  

Preparation of Bentonite Particles by Gelation and Adsorption of Copper Ion

作　　者：吴雪兰 张洋洋 龙红明 王为奎[3] 郝华龙 Wu Xuelan;Zhang Yangyang;Long Hongming;Wang Weikui;Hao Hualong(School of Metallurgy Engineering,Anhui University of Technology,Maanshan Anhui 243032;Ministry of Education Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources,Anhui University of Technology,Maanshan Anhui 243002;Jurong Kangtai Bentonite Co.,Ltd.,Zhenjiang Anhui 212441)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032 [2]冶金减排与资源综合利用教育部重点实验室,安徽马鞍山243002 [3]句容康泰膨润土有限公司,安徽镇江212441

出　　处：《山西化工》2023年第3期1-3,18,共4页Shanxi Chemical Industry

基　　金：国家自然科学基金资助项目(51504004);安徽省教育厅重点项目(KJ2015A118);大学生创新创业训练计划项目(S202110360165、S202010360151、2021004Y)。

摘　　要：为改善粉体膨润土成型条件,以钙基膨润土为原料,借助海藻酸钠与氯化钙交联作用,制备了膨润土凝胶颗粒,通过静态吸附实验探究了凝胶颗粒对Cu^(2+)在不同pH、投加量、时间、温度和初始浓度条件下的吸附效果。结果表明,在凝胶颗粒投加量为50 g/L,pH为5.3,初始Cu^(2+)质量浓度为100 mg/L时,90 min对Cu^(2+)去除率达90.06%。凝胶颗粒对Cu^(2+)吸附动力学符合拟二级动力学模型,吸附热力学符合Freundlich吸附等温模型。To improve the powder bentonite forming conditions,bentonite gel particles were prepared from calcium-based bentonite with the help of sodium alginate and calcium chloride cross-linking.The adsorption effect of gel particles on Cu^(2+)under the conditions of pH,dosage,time,temperature and initial concentration was investigated through static adsorption experiments.The results showed that the removal of Cu^(2+)at 90 min reached 90.06%at a gel particle dosage of 50 g/L,pH 5.3 and an initial Cu^(2+)concentration of 100 mg/L.The kinetics of Cu^(2+)adsorption by gel particles was in accordance with the proposed secondary kinetic model,and the adsorption thermodynamics was in accordance with the Freundlich adsorption isotherm model.

关 键 词：膨润土 铜离子吸附 交联作用 吸附动力学 吸附热力学 

分 类 号：P619.255[天文地球—矿床学]