引用本文:
徐应明, 李军幸, 戴晓华, 张泽, 高怀友. 介孔分子筛表面功能膜的制备及对水体中铅汞镉的去除作用[J]. 应用化学,
2002, 19(10): 941-945.
Citation: XU Ying-Ming, LI Jun-Xin, DAI Xiao-Hua, ZHANG Ze, GAO Huai-You. Preparation of Thiol-functionalized Mesoporous Molecular Sieve and Removal of Pb2+, Hg2+ and Cd2+ in Water[J]. Chinese Journal of Applied Chemistry, 2002, 19(10): 941-945.
Citation: XU Ying-Ming, LI Jun-Xin, DAI Xiao-Hua, ZHANG Ze, GAO Huai-You. Preparation of Thiol-functionalized Mesoporous Molecular Sieve and Removal of Pb2+, Hg2+ and Cd2+ in Water[J]. Chinese Journal of Applied Chemistry, 2002, 19(10): 941-945.
介孔分子筛表面功能膜的制备及对水体中铅汞镉的去除作用
摘要:
在介孔分子筛MCM-41表面自组装3-巯基丙基三甲氧基硅烷(MP)制得对水体中重金属离子具有良好吸附作用的功能膜材料MP-MCM-41。用XRD、IR、TG和29Si和13CCP/MASNMR对分子筛及巯基功能膜材料进行了表征。研究了溶液pH值对水体中Pb2+、Hg2+、Cd2+吸附的影响。吸附实验表明,巯基功能膜材料对水体中的Pb2+、Hg2+具有良好的吸附能力,吸附饱和容量分别可达135.76和148.20 mg/g。重金属Pb2+、Hg2+、Cd2+在功能膜材料上的吸附作用符合Langmuir型吸附等温线。
English
Preparation of Thiol-functionalized Mesoporous Molecular Sieve and Removal of Pb2+, Hg2+ and Cd2+ in Water
Abstract:
Organic ligands containing the thiol(-SH) metal-chelating functional group were grafted to the surface of a mesoporous molecular sieve MCM-41 prepared from tetraethylorthosilicate, tetra methylanmonium hydroxide and hexadecyl trimethyl ammonium bromide. X-ray diffraction, infrared spectroscopy, elemental analysis, thermogravimetric analysis, 29Si and 13C solid-state NMR spectroscopy results demonstrated the presence of the organic ligands in the modified thiol-functionalized material(designated as MP-MCM-41). MP-MCM-41 was found to be highly effective for the adsorption of Hg(Ⅱ), Pb(Ⅱ), and Cd(Ⅱ) ions, exhibiting high metal ion uptake capacities of 148.20, 135.76, and 36.50 mg/g-1, respectively. The adsorption was fitted to Langmuir isotherms.
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Key words:
- mesoporous molecular sieve
- / surface grafting
- / thiol-functionalized material
- / heavy metal
- / adsorption
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