中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (06): 634-639.DOI: 10.3724/SP.J.1095.2011.00397

• 研究论文 • 上一篇    下一篇

球状壳聚糖负载噻二唑树脂的合成及其吸附性能

邱从交1,刘美玲1*,赵严1,李海涛1,2*   

  1. (1.湖南师范大学化学生物学及中药分析教育部重点实验室，湖南师范大学化学化工学院 长沙 410081;
    2.湖南安全技术职业学院 长沙 410151)
  • 收稿日期:2010-07-07 修回日期:2010-09-19 出版日期:2011-06-10 发布日期:2011-06-10
  • 通讯作者: 李海涛，教授; Tel:0731-88872530; Fax:0731-8872426; E-mail:pjbhlt@yahoo.com.cn; 研究方向：功能高分子材料
  • 基金资助:
    国家自然科学基金（21075037）及湖南省自然科学基金（07JJ3024）资助项目

Synthesis of Crosslinked Chitosan-Supported Thiadizole Hetrocyclic Functional Chelatig Resin and Its Adsorptin Properties

QIU Congjiao1, LIU Meiling1*, ZHAO Yan1, LI Haitao1,2*   

  1. (1.Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research(Ministry of Education),
    College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410151;
    2.Safety Professional and Technology College,Changsha 410081)
  • Received:2010-07-07 Revised:2010-09-19 Published:2011-06-10 Online:2011-06-10

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摘要：

用苯甲醛保护胺基后，将2-氨基-5-巯基-1,3,4-噻二唑引入到大孔壳聚糖微球上，合成了亲水性的多孔球状吸附树脂(CTS-AMT)。 对比研究了CTS-AMT和母体微球(CTS)对Zn2+、Cu2+、Cd2+、Pb2+、Ag+和Hg2+的吸附性能。 结果表明，pH=5.0，T=298.15 K时，CTS-AMT树脂对上述金属离子的吸附在1.5 h内基本达到平衡，对金属离子Hg2+、Ag+和Pb2+的静态饱和吸附量分别为2.54、2.31和1.71 mmol/g。 在实验浓度范围内该树脂对Hg2+的吸附过程符合 Langmuir等温吸附模型。

关键词: 交联壳聚糖, 噻二唑, 合成, 吸附, 金属离子

Abstract:

A new hydrophilic functional chelating resin(CTS-AMT) with heterocyclic group were synthesized by the graft reaction between 2-amino-5-mercapto-1,3,4-thiadizole(AMT) and macroporous Schiff base chitosan(CTS)chelated bead. The structure of the resin was confirmed by FTIR spectra and elemental analysis. The adsorption property and the selectivity of CTS-AMT and the parent chitosan for Cd2+, Zn2+, Cu2+, Pb2+, Ag+ and Hg2+ were compared. The experimental results show that CTS-AMT has a higher adsorption capacity and a better selectivity than CTS as expected. In the solution of pH=5.0, T=298.15 K, the adsorption of resin on metal ions can be accomplished in about 1.5 h. The static adsorption capacities for Hg2+, Ag+ and Pb2+ are 2.54, 2.31, and 1.71 mmol/g, respectively. It shows that the adsorption isotherms approximately follows Langmuir isotherm equation under the experimental concentrations.

Key words: Cross-linked chitosan, thiadiazole, synthesis, adsorption, Metal ion

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