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题名: Preparation and characterization of chitosan-poly(vinyl alcohol)/bentonite nanocomposites for adsorption of Hg(II) ions
作者: Wang, Xiaohuan; Yang, Li; Zhang, Junping; Wang, Chuanyi; Li, Qiuye
通讯作者: Wang, XH
关键词: Nanocomposite ; Bentonite ; Adsorption selectivity ; Hg(II) ; Removal
刊名: Chemical Engineering Journal
发表日期: 2014
DOI: 10.1016/j.cej.2014.04.089
卷: 251, 期:9, 页:404-412
收录类别: SCI
摘要: Chitosan-poly(vinyl alcohol)/bentonite (CTS-PVA/BT) nanocomposites with high adsorption selectivity for Hg(II) ions were synthesized by introducing BT into the CTS-PVA polymer matrix. The structure and morphology of the nanocomposites were characterized by XRD, FTIR and SEM, etc. The BT content has great influence on microstructure of the nanocomposites. BT is in the exfoliated state in the polymer matrix when the BT content is less than 7%. Whereas some of BT tends to be intercalated by CTS and an intercalate-exfoliated nanostructure is formed as the BT content is beyond 7%. Some of BT particles disperse as tactoids in the polymeric matrix and a flocculated-intercalated nanostructure is formed with further increasing the BT content. The nanocomposites possess a mesoporous structure with a narrow size distribution and BT can effectively enhance the thermal stability. The nanocomposites have high adsorption capacity and selectivity for Hg(II) ions. The adsorption capacities for Hg(II) ions with a BT content of 0%, 10%, 30% and 50% are 460.18, 455.12, 392.19 and 360.73. mg/g, respectively, which are much higher than that for Cu(II), Cd(II) and Pb(II) ions. Interestingly, BT can improve the adsorption selectivity of the nanocomposites for Hg(II) ions. In addition, the nanocomposites can effectively remove Hg(II) of different mercuric salts with various initial concentrations and pH.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/3745
Appears in Collections:环境科学与技术研究室_期刊论文

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作者单位: Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China; Henan Univ, Key Lab Special Funct Mat, Kaifeng 475004, Peoples R China;Sci & Technol Dev & Exchange Ctr Xinjiang Uygur A, Urumqi 830011, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China

Recommended Citation:
Wang, Xiaohuan,Yang, Li,Zhang, Junping,et al. Preparation and characterization of chitosan-poly(vinyl alcohol)/bentonite nanocomposites for adsorption of Hg(II) ions[J]. Chemical Engineering Journal,2014,251(9):404-412.
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