累托石对模拟放射性核素钕(Ⅲ)离子的吸附性能研究  

Study on Adsorption Capacity of Rectorite for Simulated Radionuclide Nd(Ⅲ)

作　　者：赵秋迪[1] 孙宝红[1] 葛春艳[1] 程磊磊[1] 孙朋[1] 于少明[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009

出　　处：《非金属矿》2011年第1期69-71,74,共4页Non-Metallic Mines

基　　金：安徽省自然科学基金(编号:070415207);合肥工业大学大学生创新实验计划资助项目

摘　　要：在静态条件下,研究了天然累托石对模拟放射性核素钕(Ⅲ)离子的吸附性能、吸附动力学和吸附等温线,考察了溶液pH值、吸附时间、累托石用量等因素对吸附效果的影响。结果表明,pH值是影响吸附性能的主要因素。在室温下,pH值为7.7、吸附时间为3h、累托石用量为0.343g/L、钕(Ⅲ)离子浓度为50mg/L的条件下,用累托石吸附溶液中的钕(Ⅲ)离子,钕(Ⅲ)离子去除率可达96%以上。累托石对钕(Ⅲ)离子的吸附等温线在实验浓度范围内同时符合Langmuir方程和Freundlich方程,吸附行为符合拟二级动力学方程。Under static state,the adsorption capacity,adsorption kinetics and isotherms of natural rectorite for simulated radionuclide Nd（Ⅲ）were studied.The effects of pH value,adsorption time and dosage of rectorite on the adsorption capacity were also investigated.The results showed that pH value had a major effect on the adsorption of rectorite for Nd（Ⅲ）.The removal rate of Nd（Ⅲ）was up to 96% under the suitable adsorption conditions of room temperature,pH=7.7,adsorption time of 3h,rectorite dosage of 0.343 g/L and Nd（Ⅲ） concentrations of 50 mg/L.The adsorption isothermal curve of rectorite for Nd（Ⅲ）fitted Langmuir equation or Freundlich equation within the range of experimental concentrations and the adsorption of Nd（Ⅲ）on rectorite fitted the pseudo-second-order rate equation.

关 键 词：累托石 吸附 模拟放射性核素 钕(Ⅲ)离子 

分 类 号：X591[环境科学与工程—环境工程]