双醛淀粉尿素螯合树脂对Cu（Ⅱ）吸附性能的研究

摘要

Dialdehyde starch based urea chelating resin was first synthesized and characterized by FT-IR spectra and scanning electron microscope (SEM)analysis.Several samples with different substitutions were conducted to study their absorption capacity to Cu (Ⅱ)ions in different conditions.The results re-vealed that all samples showed adsorption capacity to Cu (Ⅱ)ions to a certain extent,and they had the muximum adsorption capacity if pH was controlled at 5.0~6.0.Moreover,higher initial Cu (Ⅱ)ion con-centrations were favorable to absorption.However,the samples of higher degrees of substitution didn't hold significant adsorption capacity to Cu (Ⅱ)ions.The adsorption process mainly depended on physical and chemical adsorption.%合成了双醛淀粉尿素螯合树脂(DASU)，并对其做了红外(FT-IR)和扫描电镜(SEM)分析，研究了不同条件下不同取代度的产品对Cu(Ⅱ)的吸附性能。结果表明：所有样品对Cu(Ⅱ)均有一定程度的吸附作用，在pH5~6时吸附能力最强，较高的初始浓度有利于吸附，但高取代度的样品对Cu(Ⅱ)并不具有显著提高的吸附能力，吸附主要靠物理吸附和化学吸附。