化工进展2023，Vol.42Issue(11)：6042-6052,11.DOI:10.16085/j.issn.1000-6613.2022-2333
FeS/壳聚糖基碳气凝胶复合材料的制备及对Cr(Ⅵ)的吸附
Preparation and Cr(Ⅵ)adsorption properties of FeS/chitosan-based carbon aerogel composites
摘要
Abstract
The FeS/chitosan-based carbon aerogel composites(FeS/CA-0.5)were prepared by sol-gel method,freeze-drying and high temperature carbonization method using chitosan as raw material.The surface morphology and structure of FeS/CA-0.5 composites were characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The effects of FeS/CA-0.5 on adsorption capacity of Cr(Ⅵ)were studied to investigate the reaction mechanism using Cr(Ⅵ)as the target pollutant.The results showed that FeS/CA-0.5 retained the structure of chitosan-based carbon aerogel and successfully dispersed FeS with a large specific surface area.FeS/CA-0.5 was magnetic.The adsorption capacity of Cr(Ⅵ)on FeS/CA-0.5 could reach 173.84mg/g at 100mL concentration of 100mg/L solution adsorbent dosing of 0.05g,pH of 2,a reaction time of 360min.The adsorption process conformed to quasi-secondary kinetics and the Langmuir isothermal adsorption model.The in-particle diffusion model indicated that the adsorption of Cr(Ⅵ)by FeS/CA-0.5 was a multi-step process and the whole adsorption process was spontaneous endothermic.The mechanism of chromium removal by FeS/CA-0.5 mainly involved physical adsorption,chemical adsorption and chemical reduction.The method of removal of Cr(Ⅵ)in wastewater by FeS/CA-0.5 had a promising application.关键词
生物质碳气凝胶/硫化铁/复合材料/吸附/六价铬Key words
biomass carbon aerogel/FeS/composites/adsorption/Cr(Ⅵ)分类
通用工业技术引用本文复制引用
常娟,程爱华..FeS/壳聚糖基碳气凝胶复合材料的制备及对Cr(Ⅵ)的吸附[J].化工进展,2023,42(11):6042-6052,11.基金项目
国家自然科学基金青年项目(52206277). （52206277）
