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首页> 外文期刊>International journal of environmental analytical chemistry >Selective preconcentration of trace thorium from aqueous solutions with Th(Ⅳ)-imprinted polymers prepared by a surface-grafted technique
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Selective preconcentration of trace thorium from aqueous solutions with Th(Ⅳ)-imprinted polymers prepared by a surface-grafted technique

机译：表面接枝技术制备的Th（Ⅳ）印迹聚合物选择性富集水溶液中的痕量th

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摘要

A novel ion-imprinted adsorbent for selective solid phase extraction of thorium(Ⅳ) based on the surface of silica gel was prepared by a surface-grafted technique with methacrylic acid (MAA) as a functional monomer. After removal of Th(Ⅳ) ions with 3molL~(-1) HC1 solution, the obtained imprinted particles for Th(Ⅳ) exhibited specific recognition and relatively rapid kinetic process. The maximum static and total dynamic adsorption capacity of the ion-imprinted polymers (IIPs) for Th(Ⅳ) was 33.2 and 17.3mgg~(-1), respectively. A comparison of the selectivity coefficient of the imprinted polymers with that of non-imprinted polymers showed that the imprinted matrix for Th(Ⅳ)/U(VI), Th(Ⅳ)/Ce(Ⅲ), Th(Ⅳ)/La(Ⅲ) and Th(Ⅳ)/Zr(Ⅳ) was 58.8, 107, 106.4 and 151.7 times greater than non-imprinted matrix, respectively. With a series of samples loading flow rate of 3mLmin~(-1) for preconcentration, an enrichment factor of 14.6 and the detection limit of 0.59 μgL~(-1) were obtained. The relative standard deviation of the method under optimum conditions was 2.1% (n = 7). The developed method was successfully applied to the determination of trace Th(Ⅳ) in real water samples with satisfactory results.
机译：以甲基丙烯酸（MAA）为功能单体，通过表面接枝技术制备了一种新型的基于硅胶表面的固相萃取solid的离子印迹吸附剂。用3molL〜（-1）HCl溶液去除Th（Ⅳ）离子后，所得印迹的Th（Ⅳ）颗粒具有特异性识别和较快的动力学过程。离子印迹聚合物（IIPs）对Th（Ⅳ）的最大静态和总动态吸附容量分别为33.2和17.3mgg〜（-1）。印迹聚合物与非印迹聚合物的选择性系数比较表明，印迹基质对Th（Ⅳ）/ U（VI），Th（Ⅳ）/ Ce（Ⅲ），Th（Ⅳ）/ La（ Ⅲ）和Th（Ⅳ）/ Zr（Ⅳ）分别是非印迹基质的58.8、107、106.4和151.7倍。以3mLmin〜（-1）的一系列样品进行预浓缩，得到的富集系数为14.6，检出限为0.59μgL〜（-1）。在最佳条件下，该方法的相对标准偏差为2.1％（n = 7）。该方法成功用于实际水样中痕量Th（Ⅳ）的测定，结果令人满意。

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  • 作者

    Canrong Lin; Hongqing Wang; Yuyuan Wang; Li Zhou; Jun Liang;

  • 作者单位

    School of Chemistry and Chemical Engineering, University of South China, 28 Changsheng West Road Hengyang, Hunan 421001, China;

    School of Chemistry and Chemical Engineering, University of South China, 28 Changsheng West Road Hengyang, Hunan 421001, China;

    School of Chemistry and Chemical Engineering, University of South China, 28 Changsheng West Road Hengyang, Hunan 421001, China;

    School of Mathematics and Physical,University of South China, 28 Changsheng West Road Hengyang, Hunan 421001, China;

    School of Chemistry and Chemical Engineering, University of South China, 28 Changsheng West Road Hengyang, Hunan 421001, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ion-imprinted polymers; solid phase extraction (SPE); thorium(Ⅳ); silica grafting; spectrophotometric determination;

    机译：离子印迹聚合物;固相萃取（SPE）;Ⅳ（Ⅳ）;二氧化硅接枝;分光光度法测定;

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