• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Polymeric ionic liquid gels composed of hydrophilic and hydrophobic units for high adsorption selectivity of perrhenate
【24h】

Polymeric ionic liquid gels composed of hydrophilic and hydrophobic units for high adsorption selectivity of perrhenate

机译：聚合物离子液体凝胶由亲水和疏水单元组成，用于高吸附选择性的渗透性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The removal of TcO4- from aqueous solutions has attracted more and more attention recently, and ReO4 has been widely used as its natural analog. In this work, polymeric ionic liquid gel adsorbents, PC2-C(12)vimBr, with high adsorption capacity and selectivity towards ReO4- were synthesized by radiation-induced polymerization and crosslinking. PC2-C(12)vimBr was composed of two monomers: a hydrophobic unit, 1-vinyl-3-dodecylimidazolium bromide for high selectivity, and a hydrophilic unit, 1-vinyl-3-ethylimidazolium bromide for improved kinetics. A gel fraction up to 90% could be achieved under 40 kGy with varied monomer ratios. The adsorption of PC2-C-12 vimBr gels for ReO4- was evaluated by batch adsorption. The PC2-C(12)vimBr gel containing 20 mol% hydrophilic unit (named PC2-C(12)vimBr-A) could significantly improve the adsorption kinetics, which had an equilibrium time of ca. 24 h. The adsorption capacity obtained from the Langmuir model was 559 mg g(-1) (Re/gel). The selective factor against NO3 was 33.4 +/- 1.9, which was more than 10 times higher than that of PC(2)vimBr, and it could maintain ReO4- uptake as high as 100 mg g(-1) in 0.5 mol kg(-1) HNO3. The Delta H-Theta and Delta S-Theta of the NO3/ReO4- ion-exchange reaction of PC2-C(12)vimNO(3)(-)A were -16.9 kJ mol (-1) and 29 J mol(-1) K-1, respectively, indicating physical adsorption. The adsorption mechanism of ReO4- onto PC2-C(12)vimBr-A gel was ion-exchange, and it could be recovered using 5.4 mol kg(-1) HNO3.
机译：TcO4-从水溶液中去除吸引了越来越多的关注最近，和ReO4已被广泛用作其自然的模拟。在这项工作中，聚合的离子液体的凝胶吸附剂，PC2-C（12）vimBr，具有朝向ReO4-高吸附容量和选择性是由辐射引起的聚合和交联来合成。 PC2-C（12）vimBr组成两种单体的：疏水性单元，1-乙烯基-3- dodecylimidazolium溴化物高选择性，和亲水性单元，1-乙烯基-3-乙基咪唑溴化物用于改善动力学。凝胶分数达到90％可以在40千戈瑞与改变单体比而实现。 PC2-C-12 vimBr凝胶为ReO4-的吸附物通过分批吸附评价。的PC2-C（12）vimBr含有凝胶20摩尔％的亲水性单元（名为PC2-C（12）vimBr-A）可以显著提高吸附动力学，其具有约的平衡时间24小时。从Langmuir模型得到的吸附容量为559毫克克（-1）（再/凝胶）。针对NO3选择性系数为33.4 +/- 1.9，这比PC（2）vimBr的高10倍以上，故能在0.5摩尔公斤保持ReO4-摄取高达100毫克克（-1）（ -1）HNO3。该NO3的德尔塔H-西塔和Delta S-西塔/ ReO4- PC2-C（12）vimNO（3）的离子交换反应（ - ）甲分别为-16.9千焦摩尔（-1）和29摩尔Ĵ（ - 1）K-1分别表示物理吸附。 ReO4-的吸附机理到PC2-C（12）vimBr-A凝胶是离子交换，故能使用5.4摩尔公斤（-1）HNO 3进行回收。

著录项

  • 来源
    《RSC Advances》 |2018年第17期|共9页
  • 作者

    Han Dong; Li Xingxiao; Cui Yu; Yang Xin; Chen Xibang; Xu Ling; Peng Jing; Li Jiuqiang; Zhai Maolin;

  • 作者单位

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Xiamen Univ Sch Publ Hlth State Key Lab Mol Vaccinol &

    Mol Diagnost Xiamen 161102 Fujian Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci Radiochem &

    Radiat Chem Key Lab Fundamental Sci Key Lab Polymer Chem &

    Phys Minist Educ Coll Chem Beijing 100871 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号