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研究了甲醛、环氧氯丙烷交联壳聚糖树脂(AECTS)对Hg2+的吸附行为和吸附Hg2+对树脂结构及性能的影响。用FT-IR、XRD、TG、DSC和SEM对吸附产物进行了结构表征,并深入分析了AECTS与Hg2+之间的作用机理。结果表明,Hg2+与AECTS中的氨基发生配位、与AECTS中的羟基形成离子键而被吸附;AECTS吸附Hg2+后,结晶度下降,总体上热稳定性变差;Hg2+对AECTS的主链分解具有明显的催化功能;Hg2+的成键使得AECTS的表面形态发生了改变。
The effects of formaldehyde and epichlorohydrin cross-linked chitosan resin (AECTS) on the adsorption of Hg2 + and the adsorption of Hg2 + on the structure and properties of the resin were investigated. The adsorption products were characterized by FT-IR, XRD, TG, DSC and SEM, and the mechanism of action between AECTS and Hg2 + was further analyzed. The results showed that Hg2 + coordinated with the amino groups in AECTS and formed an ionic bond with the hydroxyl groups in AECTS and was adsorbed. After Hg2 + adsorption, the crystallinity of Hg2 + decreased and the overall thermal stability deteriorated. The main chain decomposition of Hg2 + Obvious catalytic function; Hg2 + bonding makes AECTS surface morphology changed.