腐殖酸对水中六价铬在磁性离子交换树脂上的吸附特性与去除机制的影响

项目名称： 腐殖酸对水中六价铬在磁性离子交换树脂上的吸附特性与去除机制的影响

项目编号： No.51308001

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 丁磊

作者单位： 安徽工业大学

项目金额： 25万元

中文摘要： 针对水源中腐殖酸对磁性离子交换树脂（MIEX）吸附去除六价铬的影响机制尚不清楚，本项目拟采用试验技术、理论分析、材料表征与对比分析相结合的方法，开展不同性能腐殖酸对水中六价铬在MIEX上的吸附特性与去除机制影响的系统研究。首先探讨单组份Cr(VI)在MIEX上的吸附特性与规律，揭示除离子交换作用外，可能的其它去除机制；然后研究Cr(VI)分别与水中非溶解性腐殖酸、不同分子质量以及不同亲疏水特性的溶解性腐殖酸的作用特征，揭示不同性能腐殖酸与Cr(VI)作用机制的差别和原因；最后研究上述三类不同特性腐殖酸分别对Cr(VI)在MIEX上去除的影响，对比分析结合吸附前后溶液中离子种类和数量以及MIEX表面红外光谱和光电子能谱的变化，揭示腐殖酸对Cr(VI)在MIEX上的去除特性与机制的影响。该研究可完善和发展MIEX吸附理论，为其控制水源中Cr(VI)污染提供理论依据与实践基础。

中文关键词： 磁性离子交换树脂；六价铬；腐殖酸；吸附；离子交换

英文摘要： The effect mechanism of humic acid on the removal of hexavalent chromium adsorbed on MIEX is not interpreted distinctly. Some methods such as experimental techniques, theoretical analysis, materials characterization and comparison analysis are adopted to explore the effects of different humic acids on the adsorption characteristics and removal mechanism of chromium adsorbed on MIEX. Some experiments of one-component chromium adsorbed on MIEX are conducted to investigate the adsorption characteristics of chromium on MIEX and reveal other possible removal mechanism with the exception of ion exchange. And then the interaction properties between hexavalent chromium and insoluble humic acids, different molecular weight humic acids and different hydrophilic and hydrophobic humic acids are studied respectively. Finally, the effects of three types of different characteristics of humic acid on hexavalent chromium removal by MIEX resin are investigated respectively. These comparison analysis of MIEX surface infrared spectroscopy, X-ray photoelectron spectroscopy and the changes in ions quantity and species before and after adsorption are attributed to revealing the effect of humic acid on the adsorption characteristics and removal mechanism of hexavalent chromium from aqueous solutions by MIEX. This study can improve an

英文关键词： MIEX resin；hexavalent chromium；humic acid；adsorption；ion exchange