二异丁胺修饰的天然壳聚糖磁性微球与铼的吸附行为

doi:10.3724/SP.J.1095.2014.30604

摘要/Abstract

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

中图分类号:

O616

娄振宁, 任富强, 王静, 李叶霞, 张庆, 单炜军, 熊英. 二异丁胺修饰的天然壳聚糖磁性微球与铼的吸附行为[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30604.

LOU Zhenning, REN Fuqiang, WANG Jing, LI Yexia, ZHANG Qing, SHAN Weijun, XIONG Ying*. Re(Ⅶ) Adsorption by Magnetic Cross-linked Chitosan Microspheres Modified with Diiobutylamine[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30604.

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