Modifying the surface of TEOS xerogel by metal ion Zn(II)
- Authors: Ghasemi A.1, Ghasemi Z.2
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Affiliations:
- Chemistry Faculty, Department of Applied Chemistry, Tehran North Branch
- Department of Food Science and Technology, Faculty of Agriculture
- Issue: Vol 90, No 5 (2017)
- Pages: 826-829
- Section: Various Technological Processes
- URL: https://journals.rcsi.science/1070-4272/article/view/214941
- DOI: https://doi.org/10.1134/S1070427217050251
- ID: 214941
Cite item
Abstract
The removal of 2,4-dichlorophenol from aqueous solution by modified TEOS xerogel has been studied in batch experiments at varying pH (2.0–8.0). Tetraethyl orthosilicate (TEOS) xerogel recently has been considered as an adsorbent which is more active. Surface of the adsorbent due to the outward oxygen atoms in the molecular structure, is negatively charged, so this solid, shows good ability to adsorb metal ions. But because of the negative charge on the surface of the adsorbent, the anions, particularly organic anion compounds are not absorbed. To fix this problem, it can set the metal ions on the surface of the solid. By placing Zn ions on the xerogel, a positive charge on the surface of the adsorbent is made, which increases the ability of the adsorbent to attract 2, 4-dichlorophenol from aqueous solutions. Results show an increase in the adsorption by about 17% on empty xerogel, by about 60% in xerogel modified with metal Zn (II) ion.
About the authors
A. Ghasemi
Chemistry Faculty, Department of Applied Chemistry, Tehran North Branch
Author for correspondence.
Email: Awatghasemi@yahoo.com
Iran, Islamic Republic of, Tehran, 1913674711
Zh. Ghasemi
Department of Food Science and Technology, Faculty of Agriculture
Email: Awatghasemi@yahoo.com
Iran, Islamic Republic of, Urmia, 5756151818
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