Aliquat 336功能化壳聚糖螯合吸附剂对溶液中Y(Ⅲ)的富集分离  

Enrichment and Separation of Y(Ⅲ) from Dilute Solutions Using Aliquat 336 Functionalized Chelating Adsorbent Derived from Chitosan

作　　者：崔红敏[1,2] 陈继[1] 杨华玲[1,2] 王威[1,2] 刘郁[1] 邓岳锋[1] 张冬丽[1,2] 

机构地区：[1]中国科学院长春应用化学研究所稀土资源利用国家重点实验室,长春130022 [2]中国科学院大学,北京100049

出　　处：《分析化学》2014年第3期446-451,共6页Chinese Journal of Analytical Chemistry

基　　金：国家重点基础研究发展计划(No.2012CBA01202);中国科学院重点部署项目(No.KGZD-EW-201-1);国家自然科学基金(No.51174184)资助~~

摘　　要：采用静态吸附法研究了Aliquat 336功能化壳聚糖螯合吸附剂对溶液中Y(Ⅲ)的富集分离。溶液的pH值对Y(Ⅲ)的吸附有较大影响,Y(Ⅲ)初始浓度为90 mg/L,温度为20℃,pH=4.9时,Y(Ⅲ)的吸附量达到大;Y(Ⅲ)的吸附符合准二级动力学模型和Langmuir等温吸附模型;随着温度的升高,Y(Ⅲ)的吸附量减少,吸附过程为放热反应过程。XPS结果表明,Y(Ⅲ)的吸附机理为阴阳离子均参与了Y(Ⅲ)的吸附,提高了Y(Ⅲ)的分离选择性和吸附量。以废弃土荧光粉中土为例,讨论了在实际体系中对Y和其它土的富集和分析分离,显示了本方法潜在的应用价值。Aliquat 336 functionalized chelating adsorbent derived from chitosan for enrichment and separation of Y（RI） were investigated by static adsorption method. The adsorption of Y（III） was greatly influenced by the pH of solution, and reached maximum at 20 ℃ using 90 mg/L Y（III） at pH 4.9, and the adsorption of Y（III） followed a pseudo-second-order kinetics model and the Langmuir isotherm model. The reduction of Y （III） adsorption with the increasing of temperature meant that the adsorption process was exothermic. XPS analysis demonstrated that both cations and anions of the adsorbent were involved in adsorption process, thereby resulting in an improved adsorption of YAH）. The adsorbent was thus efficient for enrichment and separation of rare earths from waste rare earth phosphor.

关 键 词：Aliquat 336 螯合吸附剂 壳聚糖 富集分离 钇(Ⅲ) Aliquat 336 Yttrium(Ⅲ) 

分 类 号：X703[环境科学与工程—环境工程]