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Adsorption of cationic dye from water using an iron oxide/activated carbon magnetic composites prepared from sugarcane bagasse by microwave method

文献类型： 外文期刊

作者： Jiang, Wenyan 1 ; Zhang, Linye 1 ; Guo, Xiaoming 2 ; Yang, Mei 2 ; Lu, Yiwen 2 ; Wang, Yijun 2 ; Zheng, Yousen 2 ; Wei, G 1 ;

作者机构： 1.Guangxi Univ, Dept Energy Chem Engn, Nanning 530004, Peoples R China

2.Guangxi Univ, Dept Chem Engn, Nanning 530004, Peoples R China

关键词： Sugarcane bagasse; microwave; adsorption; magnetic; Regenerate

期刊名称：ENVIRONMENTAL TECHNOLOGY （ 影响因子：3.247； 五年影响因子：2.699 ）

ISSN： 0959-3330

年卷期：

页码：

收录情况： SCI

摘要： In this work, using an agricultural waste of sugarcane bagasse, new biomass of magnetic sugarcane bagasse activated carbon (MSBAC) has been successfully prepared by a simple microwave method. The composition and structure of MSBAC were characterised by SEM, XRD, BET, and FT-IR. It was found that MSBAC was a mesoporous material with a loose structure and rough surface, and it had a high specific surface area. The pH(PZC) was 4.1, and MSBAC presented a greater amount of acid functional groups than basic groups, making it efficient for adsorption of cationic dye. To study the adsorption ability of MSBAC, methylene blue (MB) was selected as sample pollutant. Effects of pH, MSBAC dosage, initial MB concentration, temperature, time on the adsorption of MB, and the possibility of regeneration of MSBAC were investigated. The adsorption results showed that the maximum adsorption capacity was 36.14 mg center dot g(-1), and the pH had no significant effect on the MB adsorption in the range of 2-10. The equilibrium data fitted Langmuir isotherm, and the adsorption kinetic data obeyed pseudo-second-order kinetic model. The adsorption process involving the surface diffusion and film diffusion. The positive value of Delta H revealed the adsorption behaviour was an endothermic process. The salt concentration had a negative effect on MB removal. MSBAC had a good magnetic separation performance. The used MSBAC could be regenerated by a simple calcination method under the temperature of 300celcius for 30 min. [GRAPHICS] .

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