钇(Ⅲ)在膨胀蛭石上的吸附行为和机理研究  

Adsorption Behavior and Mechanism of Ytttrium(Ⅲ) on Expanded Vermiculite

作　　者：文洋 冯博[1,2] 陈燕 刘丽[1] Wen Yang;Feng Bo;Chen Yan;Liu Li(Jiangxi Provincial Key Laboratory of Mining Engineering,School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Collaborative Innovation Center for Development and Utilization of Rare Metal Resources Co-sponsored by Ministry of Education,and Jiangxi Province,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学江西省矿业工程实验室,资源与环境工程学院,江西赣州341000 [2]江西理工大学稀有稀土资源开发与利用省部共建教育部协同创新中心,江西赣州341000

出　　处：《中国稀土学报》2025年第1期150-161,共12页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(52174248,52264022);江西省双千计划项目(jxsq2019201115)资助。

摘　　要：通过静态吸附实验,研究了在30%过氧化氢和300℃高温共同作用下改性得到的膨胀蛭石(Ev)对Y(Ⅲ)的行为,以及吸附剂用量、溶液pH值、吸附时间、溶液浓度、吸附温度等环境因素对单一离子在Ev表面吸附性能的影响,分析了Y(Ⅲ)在Ev上吸附的动力学机理。研究结果表明:蛭石(Ve)经过改性之后最大吸附容量达到17.54 mg·g^(-1),较Ve提升28.7%,在投加量3.5 g·L^(-1), pH值为6,吸附时间60 min, 45℃条件下,Y(Ⅲ)去除率可达98.38%。Y(Ⅲ)在Ev上的吸附遵循Langmuir等温吸附模型,符合准二级动力学模型,该过程是可自发进行吸热过程,被归纳为化学吸附。The behavior of expanded vermiculite(Ev) modified by 30% hydrogen peroxide and 300 ℃ on Y(Ⅲ) was studied by static adsorption experiment, the effects of environmental factors such as adsorbent dosage, solution p H value, adsorption time, solution concentration, and adsorption temperature on the adsorption performance of a single ion on the surface of Ev were studied, and the kinetic mechanism of Y(Ⅲ) adsorption on Ev was analyzed. The research results show that the maximum adsorption capacity of Ve(vermiculite) after modification reaches 17.54 mg·g^(-1), which is 28.7% higher than that of Ve. Under the conditions of adding 3.5 g·L^(-1), pH value of 6, adsorption time of 60 min, and 45 ℃, the removal rate of Y(Ⅲ) can reach 98.38%. The adsorption of Y(Ⅲ) on Ev follows the Langmuir isotherm adsorption model and the quasi second-order kinetic model. The adsorption process is a spontaneous endothermic process.

关 键 词：吸附 膨胀蛭石 钇 热力学 动力学 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]