| Removal of cobalt(Ⅱ) ion from aqueous solution by chitosan-montmorillonite |
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| 作者姓名： | Hailin Wang Haoqing Tang Zhaotie Liu Xin Zhang Zhengping Hao Zhongwen Liu |
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| 作者单位： | Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Key Laboratory of Applied Surface and Colloid Chemistry, Shanxi Normal University, Xi'an 710062, China;School of Chemistry & Chemical Engineering, Shanxi Normal University, Xi'an 710062, China;Key Laboratory of Applied Surface and Colloid Chemistry, Shanxi Normal University, Xi'an 710062, China;School of Chemistry & Chemical Engineering, Shanxi Normal University, Xi'an 710062, China;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Key Laboratory of Applied Surface and Colloid Chemistry, Shanxi Normal University, Xi'an 710062, China;School of Chemistry & Chemical Engineering, Shanxi Normal University, Xi'an 710062, China |
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| 基金项目： | This work was supported by the Fundamental Research Funds for the Central Universities (No. GK201002043). |
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| 摘 要： | Montmorillonite （MMT） modified with chitosan （CTS, molecular weight = S x 104） was applied to remove heavy metal cations by using Co2＋ as a model ion. An increase in MMT interlayer distance observed from X-ray diffraction indicates the intercalation of CTS into MMT. Together with the results of scanning electron microscopy and Fourier transform infrared spectroscopy, it was concluded that the composite material of CTS and MMT （CTS-- MMT） was prepared successfully. The mass ratio of CTS to MMT had a strong influence on the adsorption performance of CTS-MMT. The highest adsorption value of 150 mg/g was obtained over the composite material with CTS to MMT mass ratio of 0.25, which is much higher than those reported in other studies. The adsorption isotherms and kinetic results indicated that Co2＋ was adsorbed over CTS-MMT in a multilayer model, and the chemical sorption of Co2＋ was determined to be the rate-limiting step.
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| 关 键 词： | 重金属阳离子 蒙脱石 壳聚糖 水溶液 傅立叶变换红外光谱 扫描电子显微镜 除钴 脱乙酰壳多糖 |
| 收稿时间： | 2013-10-25 |
| 修稿时间： | 2014-04-03 |
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