Microwave synthesis and adsorption performance of a novel crosslinked starch microsphere

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• 作者：Qintie Lin ; Jianxin Pan ; Qinlu Lin ; Qianjun Liu
• 关键词：Crosslinked starch microsphere ; Adsorption ; Microwave ; Methyl violet
• 刊名：Journal of Hazardous Materials
• 出版年：15 December, 2013
• 年：2013
• 卷：263
• 期：part_P2
• 页码：517-524
• 全文大小：2437 K

文摘

A new crosslinked starch microsphere (CSM) was synthesized in a microwave-assisted inversed emulsion system with soluble starch (ST) as a raw material, MBAA as a crosslinker, and K₂S₂O₈-NaHSO₃ as an initiator. The synthesized starch microsphere was characterized and examined by scanning electron microscope (SEM), FTIR spectroscopy and adsorption isotherms of N₂ at 77 K. Adsorption performance was investigated in methyl violet solution. The results showed that the maximum adsorption capacity for MV was 99.3 mg/g at 298 K, and the adsorption fitted pseudo-second-order kinetic model well with correlation coefficients greater than 0.99. The isothermal data obeyed the Langmuir model better compared to Freundlich model and Tempkin model, and the adsorption was exothermic and spontaneous. pH variations (2.0-10.0) did not significantly affect the adsorption of MV onto CSM.