Illite/magnetic chitosan (IMCS) composites were prepared by using illite,Fe3O4 and chitosan (CS) as raw materials.It was characterized by X-ray diffraction,infrared spectroscopy and hysteresis loop,and studied its adsorption performance for Cr(Ⅵ).The experimental data was fitted and analyzed by Langmuir isotherm equation,Freundlich isotherm equation,quasi-first-order kinetic equation and quasi-second-order kinetic equation.The results shown that the amino groups of IMCS were beneficial to the adsorption of Cr(Ⅵ).The saturation magnetization of the material was 22.4emu/g,which was easy for magnetic separation and convenient for recycling adsorbent.The adsorption of Cr(Ⅵ) by IMCS composite accorded with Langmuir isotherm equation and quasi-second-order kinetic equation.The maximum adsorption capacity of Cr(Ⅵ) was 191.2mg/g under the conditions of IMCS adsorption dose of 0.05g,temperature of 25℃,Cr(Ⅵ) initial concentration of 300mg/L,adsorption time of 4 h and pH value of 5.The regenerated composite shown good adsorption performance after recycling it for 5 times.
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基金资助
黑龙江省省属高等学校基本科研业务费科研项目(135209212);齐齐哈尔大学研究生创新科研项目(YJSCX2019039)
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