太原理工大学学报2017，Vol.48Issue(2)：149-155,7.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.02.002
Fe3O4@SiO2@CS/PAA的制备及其对Cr(Ⅵ)吸附性能的研究
Preparation of Fe3O4@SiO2@CS/PAA and Its Application in Absorbing Cr (Ⅵ)from Wastewater
摘要
Abstract
According to the fact that Cr(Ⅵ)-containing wastewater has widespread sources,great toxicity,ease to accumulate but difficulty to remove,on the basis of the excellent adsorption performance of chitosan (CS),a novel "sandwich" structure adsorbent Fe3O4@SiO2@CS/PAA,of which Fe3O4 is the core,SiO2 is the sandwich layer,and CS/PAA is the shell,was synthesized.The as-prepared adsorbents were rich in amino,carboxyl,and hydroxyl groups.The absorbents for treatment of Cr(Ⅵ)(100 mg/L) simulation wastewater exhibited high adsorption for Cr(Ⅵ) under the optimum condition t=75 ℃,pH=2,ρm =1.0 g/L,and the Cr(Ⅵ) removal rate reached 64.69 ％.The adsorption process follows a pseudo-second-order kinetic model and is dominated by chemical action.The Fe3O4@SiO2@CS/PAA particles are excellent adsorbent for Cr (Ⅵ),which solves the difficult removing problem of Cr(Ⅵ) and provides theoretical and practical significance for non-toxic and harmless adsorbents.关键词
磁性壳聚糖/含铬废水/吸附/核壳结构/吸附动力学Key words
magnetic chitosam/Cr (Ⅵ)-containing wastewater/adsorption/core-shell structure/adsorption kinetics分类
资源环境引用本文复制引用
乔晨,马建超,李彦威,章青芳,肖宇强,马清亮..Fe3O4@SiO2@CS/PAA的制备及其对Cr(Ⅵ)吸附性能的研究[J].太原理工大学学报,2017,48(2):149-155,7.基金项目
国家自然科学青年基金资助项目:磁性核壳结构膨润土基煤泥水沉降复合絮凝剂的制备研究(51204119) （51204119）
山西省青年科学基金:磁响应性絮凝剂的组装设计与嵌套结构形成机理研究(2014021015-4) （2014021015-4）
磁性Fenton层状结构材料的构筑及其对焦化废水污染物的吸附-氧化协同作用机制研究(2015021107) （2015021107）
