ADSORPTION OF SAMARIUM(III) ON DIGLYCOLAMIDIC ACID RESIN

查看全文 作　　者：[1]SHILinmei;[2]XIONGChunhua;[3]MOJianiun 机构地区：[1]CollegeofprofessionalTechnology,LishuiNormalitySpeciality,Lishui,Zhejiang,323000,China;[2]CollegeofFoodScience,Biotechnology&EnvironmentalEngineeringHangzhouUniversityofCommerce,Hangzhou310035,China;DepartmentofChemistry,LishuiTeachersCollege,Lishui,Zhejiang323000,China;[3]CollegeofFoodScience,Biotechnology&EnvironmentalEngineeringHangzhouUniversityofCommerce,Hangzhou310035,China 出　　处：《Chinese Journal of Reactive Polymers》索引2003年第12卷第1期,共8页 基　　金：The Natural Science Foundation of Zhejiang Province (No.200072) 摘　　要：The sorption behavior and mechanism of a novel chelate resin, diglycolamidic acid resin (DAAR), for Sm(lll) were investigated. The optimal sorption condition of DAAR for Sm(lll) is pH=6.0 in HAc-NaAc medium. The statically saturated sorption capacity is 190mg/g resin at 298K. The Sm(lll) adsorbed on DAAR can be eluted reaching 100% by 0.5-2.0mol/L HCI used as eluant. The resin can be regenerated and reused without apparent decrease of sorption capacity. The apparent sorption rate constant is k298= 1.96×10^-5s^-1. The apparent activation energy is 26kJ/mol. The sorption behavior of DAAR for Sm(lll) obeys the Freundlich isotherm. The thermodynamic sorption parameters, enthalpy change ΔH of DAAR for Sm(lll) is 16.9Kl/mol. The molar coordination ratio of the functional group of DAAR to Sin (111) is 3. The sorption mechanism of DAAR for Sm(lll) was examined by using chemical method and IR spectrometry. The coordination bond was formed between oxygen atoms in the functional group of DAAR and Sin(Ill). 关 键 词：吸附剂 钐(III) 亚氨基二乙酸树脂 吸附机理 合成 表征 聚合物