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首页> 外文期刊>Journal of Hazardous Materials >Ion-recognizable hydrogels for efficient removal of cesium ions from aqueous environment
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Ion-recognizable hydrogels for efficient removal of cesium ions from aqueous environment

机译：离子识别水凝胶，可从水性环境中有效去除铯离子

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摘要

At present, selective and efficient removal of cesium ions (cs(+)) from nuclear waste is of significant importance but still challenging. In this study, an easy-to-get and low-cost hydrogel adsorbent has been developed for effective adsorption and removal of Cs+ from aqueous environment. The novel Cs+-recognizable poly(acrylic acid-co-benzo-18-crown-6-acrylamide) (poly(AAc-co-B18C6Am)) hydro gel is specifically designed with a synergistic effect, in which the AAc units are designed to attract Cs+ via electrostatic attraction and the B18C6Am units are designed to capture the attracted Cs+ by forming stable 2:1 "sandwich" complexes. The poly(AAc-co-B18C6Am) hydrogels are simply synthesized by thermally initiated free-radical copolymerization and display excellent Cs+ adsorption from commonly coexisting metal ions. Important parameters affecting the adsorption are investigated comprehensively, and the adsorption kinetics and adsorption isotherms are also discussed systematically. The poly(AAc-co-B18C6Am) hydrogels exhibit rapid Cs+ adsorption within 30 min and the adsorption process is governed by the pseudo-second order model. Adsorption isotherm results demonstrate that the equilibrium data are well fitted by the Langmuir isotherm model, indicating that the Cs+ adsorption is probably a monolayer adsorption process. Such Cs+-recognizable hydrogel materials based on the host-guest complexation are promising as efficient and feasible candidates for adsorption and removal of radioactive Cs+ from nuclear contaminants. (C) 2016 Elsevier B.V. All rights reserved.
机译：目前，从核废料中选择性和有效地去除铯离子（cs（+））具有重要意义，但仍具有挑战性。在这项研究中，已经开发了一种易于获取且成本低廉的水凝胶吸附剂，可以有效地从水性环境中吸附和去除Cs +。特别设计具有协同效应的新型Cs +可识别的聚（丙烯酸-co-苯并-18-冠-6丙烯酰胺）（聚（AAc-co-B18C6Am））水凝胶，其中AAc单元旨在通过静电吸引吸引Cs +，B18C6Am单元旨在通过形成稳定的2：1“三明治”络合物来捕获吸引的Cs +。聚（AAc-co-B18C6Am）水凝胶是通过热引发的自由基共聚简单地合成的，并从常见的共存金属离子中表现出出色的Cs +吸附能力。全面研究了影响吸附的重要参数，并系统地讨论了吸附动力学和吸附等温线。聚（AAc-co-B18C6Am）水凝胶在30分钟内显示出快速的Cs +吸附，且吸附过程受拟二级模型控制。吸附等温线结果表明，Langmuir等温线模型很好地拟合了平衡数据，表明Cs +吸附可能是单层吸附过程。这种基于主体-客体络合的可识别Cs +的水凝胶材料有望成为从核污染物中吸附和去除放射性Cs +的有效可行的候选材料。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2017年第ptab期|632-640|共9页
  • 作者

    Yu Hai-Rong; Hu Jia-Qi; Liu Zhuang; Ju Xia-Jie; Xie Rui; Wang Wei; Chu Liang-Yin;

  • 作者单位

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China|Southwest Univ Nationalities, Coll Chem & Environm Protect Engn, 16,Southern 4 Sect,Yihuan Rd, Chengdu 610041, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China;

    Sichuan Univ, Sch Chem Engn, 24,Southern 1 Sect,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China|Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 211816, Jiangsu, Peoples R 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cesium ions; Crown ethers; Host-guest systems; Cross-linked hydrogels; Adsorption;

    机译：铯离子;冠醚;客体系统;交联水凝胶;吸附;

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