Application of magnetic particles modified with amino groups to adsorb
copper ions in aqueous solution |
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Authors: | Yafen Lin Huawei Chen Kaelong Lin Boryann Chen and Chyowsan Chiou |
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Institution: | 1. Department of Chemical and Materials Engineering, "National" I-Lan University I-Lan 260, Taiwan, China 2. Department of Cosmetic Application and Management, St. Mary's Medicine Nursing and Management College, I-Lan 260, Taiwan, China 3. Department of Environmental Engineering, "National" I-Lan University, I-Lan 260, Taiwan, China |
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Abstract: | A magnetic adsorbent can be easily recovered from treated water by magnetic force, without requiring further downstream treatment.
In this research, amine-functionalized silica magnetite has been synthesized using N-3-(trimethoxysilyl)propyl]-ethylenediamine
(TPED) as a surface modification agent. The synthesized magnetic amine adsorbents were used to adsorb copper ions in an aqueous
solution in a batch system, and the maximum adsorption was found to occur at pH 5.5 0.1. The adsorption equilibrium data fitted the
Langmuir isotherm equation reasonably well, with a maximum adsorption capacity of 10.41 mg/g. A pseudo second-order model could
best describe the adsorption kinetics, and the derived activation energy was 26.92 kJ/mol. The optimum condition to desorb Cu2+ from
NH2/SiO2/Fe3O4 was provided by a solution with 0.1 mol/L HNO3. |
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Keywords: | magnetic adsorbent SiO2 amine adsorb copper ion |
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