新型生态渠道材料对水中Cu^(2+)吸附行为研究  

Study on Adsorption of Cu^(2+) in Water by A New Ecological Channel Material

作　　者：耿瑞雯 胥梦琦 陈靓 刘建龙 闵克祥 赵艳 张红艳 刘建华 朱慧 石雯倩 祝建中[1] GENG Ruiwen;XU Mengqi;CHEN Liang;LIU Jianlong;MIN Kexiang;ZHAO Yan;ZHANG Hongyan;LIU Jianhua;ZHU Hui;SHI Wenqian;ZHU Jianzhong(College of Environment,Hohai University,Nanjing,Jiangsu 210098,China;Hangzhou Xiaoran Ecological Construction Development Co.,Ltd.,Hangzhou,Zhejiang 311201,China;Jiangsu Qinhuai River Conservancy Engineering Management Office,Nanjing,Jiangsu 210022,China;Shanghai Urban Construction Vocational College,Shanghai 200438,China)

机构地区：[1]河海大学环境学院,江苏南京210098 [2]杭州萧然生态建设发展有限公司,浙江杭州311201 [3]江苏省秦淮河水利处工程管理处,江苏南京210022 [4]上海城建职业学院,上海200438

出　　处：《环境监测管理与技术》2025年第2期62-66,共5页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(51979077);江苏水利科技基金资助项目(2022036)。

摘　　要：用阴离子型聚丙烯酰胺(APAM)对钙基膨润土(Bent)进行插层改性制得改性钙基膨润土(PB),作为一种新型生态渠道材料,分析其改性前后对水中Cu^(2+)的吸附热力学和动力学特征。结果表明:PB对Cu^(2+)的吸附性能强于Bent,在25℃时最优吸附条件为pH值为4且投加量为2 g/L;吸附等温线符合Freundlich模型,动力学符合准二阶动力学模型,最大平衡吸附量为11.4 mg/g,吸附过程以多层吸附为主,主要由化学吸附为驱动。A new ecological channel material,modified calcium bentonite(PB),was prepared by intercalation modification of calcium bentonite with anionic polyacrylamide(APAM),and the thermodynamic and kinetic characteristics of Cu^(2+)adsorption in water before and after modification were analyzed.The results showed that PB had stronger adsorption performance for Cu^(2+)than Bent.The optimal adsorption conditions were a temperature of 25℃,a pH value of 4 and a dosage of 2 g/L.The adsorption isotherm conformed to Freundlich model,and the kinetics conformed to quasi-second-order kinetic model.The maximum equilibrium adsorption capacity was 11.4 mg/g.It was mostly multilayer adsorption,mainly driven by chemical adsorption.

关 键 词：Cu^(2+) 聚丙烯酰胺 生态渠道材料 钙基膨润土 吸附 废水处理 

分 类 号：X703[环境科学与工程—环境工程]