一种改性螯合树脂的合成及其对水体Hg^(2+)的吸脱附性能研究

Synthesis of a Surface Functional Copolymer Resin and its Properties for the Adsorption and Desorption of Hg^(2+) in Aqueous

以原Amberlite XAD-4树脂为母体为基础上,进一步引入巯基和羧基改性,获得了树脂的表面功能化。以傅里叶变换红外光谱,光电子能谱表征结合吸附性能的研究探明其可能的合成及改性机制。结果表明,初始质量浓度为10 mg/L的Hg^(2+)下,改性树脂上Hg^(2+)的静态吸附质量比由1.84 mg/g显著提升至3.63 mg/g。尝试了改性树脂上水体微量Hg^(2+)的洗脱性能,在Hg^(2+)初始质量浓度为0.2 mg/L系统研究了不同方法对Hg^(2+)的洗脱,表明优化条件下Hg^(2+)的洗脱率可以达到90%以上。

A copolymer resin was synthesized on the basis of Ambrlite XAD-4 resin. The as-prepared resin was surface functionalized by the treatment of sulfhydryl and carboxyl groups. The resulted material was characterized by FT-IR and XPS,meanwhile the possible mechanisms for the copolymerization and the sequent modification were proposed by the adsorption properties. The results show that the static adsorption capacity of Hg2＋on the modified resin under the initial Hg2＋concentration of 10 mg/L is significantly increased from 1.84 mg/g to 3.63 mg/g. The enrichment of trace Hg2＋in water on functional resin was attempted. The elution of Hg2＋by different methods was studied at the initial concentration of 0. 2 mg/L at the initial concentration of Hg2＋, indicating that the elution rate of Hg2＋can reach more than 90% under optimized conditions.