交联壳聚糖对常见金属离子的吸附性能及机理探讨

doi:10.13228/j.issn.1000-7571.2014.09.012

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摘要选用戊二醛为交联剂制备壳聚糖微球,用扫描电镜、红外和差示扫描量热仪等对产物进行了表征,研究了交联壳聚糖对常见金属离子的吸附行为。实验表明,吸附反应在20 min内均可达到平衡;对Cd²⁺、Pb²⁺、Zn²⁺、Ag⁺、Co²⁺和Cu²⁺的平衡吸附容量分别为15.5、38.5、7.9、22.4、27.2和12.6 mg/g。同时利用XPS探讨了吸附机理,结果表明与重金属离子配位时,交联壳聚糖主要利用了分子中的—NH₂或—OH基团。

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	邢云
	李素娟
	李步海

关键词 ：壳聚糖, 金属离子, 吸附, 机理

Abstract：Chitosan was prepared with glutaraldehyde as cross-linking agent,and then characterized by scanning electron microscope (SEM), infrared method and differential scanning calorimeter to study the adsorption behavior of cross-linked chitosan to common metal ions. It showed that, the adsorption reaction could reach equilibrium within 20 min; the equilibrium adsorption capacity to Cd²⁺, Pb²⁺, Zn²⁺, Ag⁺, Co²⁺ and Cu²⁺ was 15.5, 38.5, 7.9, 22.4, 27.2, 12.6 mg/g, respectively. The adsorption mechanism was also discussed by X-ray photoelectron spectroscopy. The results showed that cross-linked chitosan mainly adsorbed metal irons by taking advantage of —NH₂ or —OH radicals in molecules to coordinate with heavy metal ions.

Key words： chitosan metal ions adsorption mechanism

收稿日期: 2014-02-17

ZTFLH:

O647.31

基金资助:国家自然科学基金(No.21105002);河南省科技厅重点项目(112102210372);河南省教育厅自然科学研究计划项目(2010A150002);河南省骨干教师资助项目

通讯作者: 邢云(1976-),女,副教授,从事分离富集方面的研究;E-mail: xingyun@aynu.edu.cn E-mail: xingyun@aynu.edu.cn

引用本文:

邢云,李素娟,李步海. 交联壳聚糖对常见金属离子的吸附性能及机理探讨[J]. 冶金分析, 2014, 34(9): 58-65. XING Yun, LI Su-juan, LI Bu-hai. Discussion on the adsorption performance and mechanism of cross-linked chitosan to common metal ions. , 2014, 34(9): 58-65.

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http://47.93.29.245/Jweb_yjfx/CN/10.13228/j.issn.1000-7571.2014.09.012 或 http://47.93.29.245/Jweb_yjfx/CN/Y2014/V34/I9/58

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