离子印迹法制备对铜离子(Ⅱ)选择性吸附的碳基材料

doi:10.11944/j.issn.1000-0518.2015.11.150026

摘要/Abstract

摘要：

通过钨离子印记方法,合成了对铜离子有高选择性吸附性能的碳基材料。在四乙烯五胺(TEPA)、钨酸铵和葡萄糖摩尔比为1:1:5条件下,经水热法合成的碳基吸附材料能有效地吸附铜离子,对铜离子吸附的最佳pH=5。在Cd²⁺、Co²⁺、Cu²⁺、Ni²⁺和Zn²⁺摩尔浓度相近体系中,离子印记碳基吸附材料对铜离子的吸附率高达97.2%,而对Cd²⁺、Co²⁺、Ni²⁺、Zn²⁺吸附率分别为20.1%、9.63%、20.3%、13.3%,表明这种离子印记碳基吸附材料对Cu²⁺具有非常优异的选择吸附能力。

关键词: 印迹法, 铜离子吸附, 碳基材料, 吸附选择性

Abstract:

An amino-functionalized metal ion-imprinted adsorbent was newly synthesized for the selective extraction and removal of Cu(Ⅱ) from aqueous solution. The adsorption capacity of the amino-functionalized ion-imprinted adsorbent was found to be significantly more than that of several adsorbents reported in the literatures. In this work, tetraethylene pentamine(TEPA), tungsten ions as template and glucose are combined together with a specific mole ratio(1:1:5) to prepare carbon-based adsorbents by hydrothermal synthesis. The carbon based adsorbent was characterized by SEM, TEM and XPS. The optimum pH for Cu(Ⅱ) adsorption was found to be 5. The adsorption efficiency of the imprinted material for Cu(Ⅱ) was up to 97.2%, while the efficiencies were 20.1%, 9.63%, 20.3%, 13.3% for Cd²⁺, Co²⁺, Ni²⁺, Zn²⁺, respectively. The high selectivity indicates that this modified carbon microspheres by the W ion-imprinted method can be used as the selective adsorbent for the removal of copper ions from wastewater.

Key words: ion-imprinted, Cu(Ⅱ) adsorption, carbon microspheres, selectivity adsorption

彭维, 李杰, 程舸, 谢珍珍, 石磊. 离子印迹法制备对铜离子(Ⅱ)选择性吸附的碳基材料[J]. 应用化学, 2015, 32(11): 1307-1311.

PENG Wei, LI Jie, CHENG Ge, XIE Zhenzhen, SHI Lei. Carbon Microspheres Prepared by the Metal Ion Imprinted Method for Selective Adsorption of Copper(Ⅱ) Ion[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1307-1311.

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