膨润土基复合材料的制备及其对铜离子吸附性能的研究  

Preparation of bentonite-based composites and their adsorption properties for copper ions

作　　者：吴雪兰[1,2] 许倩倩 张洋洋 龙红明 杨博 吴健辉[1,2] Wu Xuelan;Xu Qianqian;Zhang Yangyang;Long Hongming;Yang Bo;Wu Jianhui(Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education,Anhui University of Technology,Ma anshan 243032;School of Metallurgy Engineering,Anhui University of Technology,Ma anshan 243032;Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources of Ministry of Education,Anhui University of Technology,Ma anshan 243002)

机构地区：[1]安徽工业大学生物膜法水质净化及利用技术教育部工程研究中心,马鞍山243032 [2]安徽工业大学冶金工程学院,马鞍山243032 [3]安徽工业大学冶金减排与资源综合利用教育部重点实验室,马鞍山243002

出　　处：《化工新型材料》2025年第4期206-213,共8页New Chemical Materials

基　　金：国家自然科学基金(51504004);安徽省教育厅重点项目(KJ2015A118);生物膜法水质净化及利用技术教育部工程研究中心开放基金资助项目(BWPU2022KF05);大学生创新创业训练计划项目(S202310360166、S202310360156、2022005Y和2022004Z)。

摘　　要：以钙基膨润土和钢渣为原料,425型水泥为粘结剂、尿素为致孔剂,通过挤出-滚圆-焙烧法分别制备膨润土、膨润土/钢渣吸附材料,并对比研究了膨润土与膨润土/钢渣复合材料对Cu^(2+)的吸附性能,探究其吸附机理。结果表明:当pH为5.3,初始Cu^(2+)浓度为100mg/L时,膨润土颗粒用量为50g/L,对Cu^(2+)的去除率达92.40%;而膨润土/钢渣颗粒用量为30g/L,对Cu^(2+)去除率达94.31%。膨润土颗粒对Cu^(2+)的吸附主要依靠离子交换作用,且该过程更符合拟一级动力学模型、Langmuir吸附等温模型;膨润土/钢渣颗粒对Cu^(2+)的吸附主要依靠沉淀作用和离子交换作用,且该过程更符合拟二级动力学模型、Freundlich吸附等温模型。热力学参数计算表明这两种颗粒对Cu^(2+)吸附是自发进行的吸热、熵增过程。The bentonite and bentonite/steel slag adsorbent materials were prepared by the extrusion-rolling-roasting method using calcium-based bentonite and steel slag as raw materials,425 cement as binder and urea as porogenic agent.The adsorption performance of bentonite and bentonite/steel slag composites for Cu^(2+)was studied comparatively.The results showed that when the pH was 5.3 and the initial concentration of Cu^(2+)was 100mg/L,the amount of bentonite particles was 50g/L,the removal rate of Cu^(2+)was 92.40%,while the amount of bentonite/steel slag particles was 30g/L,the removal rate of Cu^(2+)was 94.31%.The adsorption of Cu^(2+)by bentonite particles mainly relied on ion exchange,and the process was more in line with the quasi-first-order kinetic model and the Langmuir adsorption isothermal model.The adsorption of Cu^(2+)by bentonite/steel slag particles mainly depended on precipitation and ion exchange,and the process confirmed better to the quasi-second-order kinetic model and the Freundlich adsorption isothermal model.The thermodynamic parameter calculations indicated that the adsorption of Cu^(2+)by the two particles was a spontaneous endothermic and entropy increase process.

关 键 词：膨润土 钢渣 吸附铜离子 吸附动力学 吸附热力学 

分 类 号：TD985[矿业工程—选矿]