Сорбцiйна рiвновага важких металiв на полісілоксані з прищепленими 2-аміноетилпіридиновими групами
A new silica-based organic-inorganic hybrid material with grafted 2-aminoethylpyridine functional groups (SiAEP) has been synthesized by sol-gel method. Methods of the elemental analysis, 13С and 1H NMR spectroscopy have been used in order to find substance composition; surface-structural characteri...
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| Date: | 2010 |
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| Main Authors: | , , , , , , , |
| Format: | Article |
| Language: | English |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2010
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| Online Access: | https://www.cpts.com.ua/index.php/cpts/article/view/35 |
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| Journal Title: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Summary: | A new silica-based organic-inorganic hybrid material with grafted 2-aminoethylpyridine functional groups (SiAEP) has been synthesized by sol-gel method. Methods of the elemental analysis, 13С and 1H NMR spectroscopy have been used in order to find substance composition; surface-structural characteristics of the SiAEP have been defined by method of nitrogen adsorption–desorption isotherms. The effect of pH on the sorption of copper (II), nickel (II), cobalt (II), zinc (II), cadmium (II), and lead (II) ions has been studied. A selectivity order of SiAEP at рН=6.5 is as follows: Cu>Co>Zn>Ni>Pb>Cd. Sorption isotherms of heavy metal ions by SiAEP have been obtained, their mathematical processing by models of Langmuir, Freundlich, and Redlich-Peterson has been carried out. The values of the maximum uptake SiAEP capacity for Cu2+, Co2+, Zn2+, Ni2+, and Cd2+ ions have been defined to be of 2.04, 1.76, 1.46, 1.06, and 0.76 mmol/g, respectively. |
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