PEMP/AC对Ce(Ⅲ)的吸附性能研究  

Study on Adsorption Performance of PEMP/AC on Ce(Ⅲ)

作　　者：付春燕[1] 杜朝军[2] 郑诗礼[3] 杨幼明[1] FU Chun-yan;DU Chao-jun;ZHENG Shi-li;YANG You-ming(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Nanyang Research Institute of Zhengzhou University,Nanyang Institute of Technology,Nanyang 473004,Henan,China;Innovation Academy for Green Manufacture,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]南阳理工学院郑州大学南阳研究院,河南南阳473004 [3]中国科学院绿色过程制造创新研究院,北京100190

出　　处：《有色金属（冶炼部分）》2021年第1期56-60,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：中国科学院绿色过程制造创新研究院稀土产业基金项目(IAGM2020DB10)。

摘　　要：为寻求一种新型稀土富集分离工艺,通过浸渍法将自制甲基膦酸乙二醇酯低聚物(PEMP)负载到活性炭(AC)上,通过傅里叶红外光谱(FTIR)对PEMP/AC吸附Ce(Ⅲ)前后的结构进行表征,考察了吸附时间、吸附温度、初始水溶液酸度对吸附效果的影响。结果表明,在较低酸度条件下,PEMP/AC对Ce(Ⅲ)有着较好的吸附效果,符合Freundlich等温吸附模型;最佳饱和吸附容量为126.3mg/g,液膜扩散为吸附主控步骤;吸附过程是放热的,因此应在较低温度下进行吸附;稀盐酸对PEMP/AC洗脱效果的影响明显。Self-prepared ethylene glycol methyl phosphonate oligomer(PEMP)was loaded on activated carbon(AC)by impregnation method to find a new enrichment and separation process of rare earth.Structure of PEMP/AC adsorbent before and after adsorbing Ce(Ⅲ)was characterized by Fourier Infrared Spectroscopy(FTIR).Effects of temperature,adsorption time,acidity of initial aqueous on adsorption performance of Ce(Ⅲ )were investigated.The results show that PEMP/AC has a better extraction effect at lower acidity conditions,and its adsorption process conforms to the Freundlich isotherm adsorption model.The optimal saturated adsorption capacity of PEMP/AC for Ce(Ⅲ)is 126.3 mg/g.It is confirmed that the G.E.Boyd liquid membrane diffusion mechanism controls adsorption process.Adsorption should be carried out at a lower temperature due to exothermic adsorption process.Dilute hydrochloric acid has obvious elution effect on PEMP/AC.

关 键 词：活性炭 PEMP/AC Ce(Ⅲ) 吸附 动力学 

分 类 号：TF845[冶金工程—有色金属冶金]