化工进展2023，Vol.42Issue(12)：6589-6599,11.DOI:10.16085/j.issn.1000-6613.2023-0123
氨基功能化双醛淀粉吸附剂的制备及其对Pb(Ⅱ)的吸附行为
Preparation of amino-functionalized dialdehyde starch adsorbent for adsorption of Pb(Ⅱ)ions
摘要
Abstract
Amino functionalized dialdehyde starch(NH2-DAS)was successfully synthesized by Schiff base reaction of DAS with hydrazine hydrate.During the preparation process,dialdehyde starch(DAS)was firstly prepared using starch as raw material and NaIO4 as oxidant.The morphology,element distribution,thermal stability and surface chemical property of the NH2-DAS adsorbent were characterized by SEM,EDX,XRD,TGA,FTIR and XPS.The adsorption behavior and adsorption mechanism of NH2-DAS adsorbent toward Pb(Ⅱ)from aqueous solution were studied.The results showed that the adsorption behavior of Pb(Ⅱ)onto NH2-DAS adsorbent could be well described by Langmuir isotherm model and Pseudo-second-order kinetic mode.The NH2-DAS exhibited a high adsorption capacity of 165mg/g toward Pb(Ⅱ)at adsorption temperature of 45℃,pH=5.5 and the adsorption time of 240min.The adsorption of NH2-DAS on Pb(Ⅱ)mainly depended on the coordination bonds between—C== N—,—NH2 groups and Pb(Ⅱ)ions.The adsorption process was a spontaneous,endothermic and entropy increase process.After five times of regeneration test,the adsorption capacity of NH2-DAS for Pb(Ⅱ)was still above 84.8%of original adsorption capacity.Therefore,the NH2-DAS adsorbent had potential application prospects in the removal of Pb(Ⅱ)ions from aqueous solution.关键词
双醛淀粉/吸附剂/铅离子/吸附机理Key words
dialdehyde starch/adsorbent/lead(Ⅱ)ions/adsorption mechanism分类
化学引用本文复制引用
郭宇,佟民心,吴红梅..氨基功能化双醛淀粉吸附剂的制备及其对Pb(Ⅱ)的吸附行为[J].化工进展,2023,42(12):6589-6599,11.基金项目
国家自然科学基金(21601075) （21601075）
辽宁省"兴辽英才计划"(XLYC2007171) （XLYC2007171）
辽宁省自然科学基金面上项目(2021-MS-321). （2021-MS-321）
