应用化学

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二异丁胺修饰的天然壳聚糖磁性微球与铼的吸附行为

娄振宁,任富强,王静,李叶霞,张庆,单炜军,熊英*   

  1. (辽宁大学化学院 辽宁省稀散元素重点实验室 沈阳 110036)
  • 收稿日期:2013-11-29 修回日期:2014-03-24 出版日期:2014-09-03 发布日期:2014-09-03
  • 通讯作者: 熊英,教授; Tel:024-62207873; Fax:024-62202380; E-mail:xiongying@lnu.edu.cn; 研究方向:稀有金属分离与功能材料
  • 基金资助:
    国家自然科学基金(21171080,21201094)国家科技支撑计划(2012BAF03B00)辽宁省高等学校优秀人才支持计划(LJQ2012001)资助项目

Re(Ⅶ) Adsorption by Magnetic Cross-linked Chitosan Microspheres Modified with Diiobutylamine

LOU Zhenning, REN Fuqiang, WANG Jing, LI Yexia, ZHANG Qing, SHAN Weijun, XIONG Ying*   

  1. (Key Laboratory of Rare-scattered Elements of Liaoning Province,School of Chemistry,Liaoning University,Shenyang 110036,China)
  • Received:2013-11-29 Revised:2014-03-24 Published:2014-09-03 Online:2014-09-03
  • Contact: Ying Xiong

摘要: 以生物质废弃物螃蟹壳为原料,通过简单的化学处理制成磁性微球,再经二异丁胺(DIBA)修饰合成了生物质吸附剂FCS-DIBA[FCS:Fe3O4与壳聚糖(CS)复合微球]。 FCS-DIBA对Re(Ⅶ)具有很高的吸附选择性,最大吸附量可达185 mg/g,而且不受环境酸度的影响,在pH=2条件下可实现Re(Ⅶ)与Cu(Ⅱ)、Zn(Ⅱ)、Mn(Ⅶ)和Fe(Ⅲ)等常见共存金属离子的分离,该吸附等温线符合Langmuir方程。 此外,对FCS-DIBA吸附铼的机制和吸附稳定性能等进行了探讨。

关键词: 铼, 蟹壳, 化学修饰, 吸附

Abstract: The magnetic cross-linked chitosan microspheres were prepared using Fe3O4 nanoparticles as cores and chitosan(CS) as polymeric shell with diisobutylamine(FCS-DIBA) modification. For the Re(Ⅶ) species coexisting with Fe(Ⅲ), Zn(Ⅱ), Mn(Ⅶ) and Cu(Ⅱ), the FCS-DIBA adsorbent exhibits selectivity only for Re(Ⅶ) among coexisting heavy metals in pH=2. The maximum adsorption capacity for Re(Ⅶ) is up to 185 mg/g, The adsorption behavior fits the Langmuir isotherm model. The mechanism for these excellent adsorption characteristics was discussed.

Key words: rhenium, crab shells chitosan, chemical modification, biosorption

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