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Adsorption of some weak organic electrolytes from aqueous solutions on silica

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Authors
Milonjić, Slobodan K.
Zhigunova, L. K.
Pavasovic, V. Lj.
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Abstract
The adsorption of organic electrolytes from aqueous solutions on various adsorbents has been frequently investigated because of its importance in water purification. Phenol and substituted phenols are very common contaminants of water. In this paper, the adsorption results of some weak organic electrolytes (hydrochinon, phloroglucin and acidum gallicum) from aqueous solutions on silica are presented. The adsorption of the organics was investigated by the batch method. Effects of solution pHs (in the 2-10 range) and concentrations of these compounds on the adsorption were investigated. In the case of acidum gallicum, adsorption isotherms (in the 2-6 pH range) were determined. The obtained results indicate that the amount of adsorbed acidum gallicum increases with its increasing concentration. The maximum adsorption was recorded at pH=2-3 (pH equal to pH(pzc) of SiO2) with acidum gallicum molecule being undissociated (pK(a)= 4.41). The experimental data were fitted with different adsorpt...ion isotherms models. The maximum amount of acidum gallicum adsorbed as well as the Freundlich constants of adsorption were calculated. The adsorption of hydrochinon and phloroglucin from aqueous solutions (in the investigated pH range) on silica was negligible.

Keywords:
acidum gallium / Adsorption / hydrochinon / phloroglucin / silica
Source:
Materials Science Forum, 2007, 555, 195-+
Note:
  • Research Trends in Contemporary Materials Science, 8th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS), Sep 04-08, 2006, Herceg Novi, Montenegro

DOI: 10.4028/www.scientific.net/MSF.555.195

ISSN: 0255-5476

WoS: 000249653700031

[ Google Scholar ]
7
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http://vinar.vin.bg.ac.rs/handle/123456789/6684
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  • WoS Import
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Vinča
TY  - CONF
AU  - Milonjić, Slobodan K.
AU  - Zhigunova, L. K.
AU  - Pavasovic, V. Lj.
PY  - 2007
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6684
AB  - The adsorption of organic electrolytes from aqueous solutions on various adsorbents has been frequently investigated because of its importance in water purification. Phenol and substituted phenols are very common contaminants of water. In this paper, the adsorption results of some weak organic electrolytes (hydrochinon, phloroglucin and acidum gallicum) from aqueous solutions on silica are presented. The adsorption of the organics was investigated by the batch method. Effects of solution pHs (in the 2-10 range) and concentrations of these compounds on the adsorption were investigated. In the case of acidum gallicum, adsorption isotherms (in the 2-6 pH range) were determined. The obtained results indicate that the amount of adsorbed acidum gallicum increases with its increasing concentration. The maximum adsorption was recorded at pH=2-3 (pH equal to pH(pzc) of SiO2) with acidum gallicum molecule being undissociated (pK(a)= 4.41). The experimental data were fitted with different adsorption isotherms models. The maximum amount of acidum gallicum adsorbed as well as the Freundlich constants of adsorption were calculated. The adsorption of hydrochinon and phloroglucin from aqueous solutions (in the investigated pH range) on silica was negligible.
C3  - Materials Science Forum
T1  - Adsorption of some weak organic electrolytes from aqueous solutions on silica
VL  - 555
SP  - 195
EP  - +
DO  - 10.4028/www.scientific.net/MSF.555.195
ER  - 
@conference{
author = "Milonjić, Slobodan K. and Zhigunova, L. K. and Pavasovic, V. Lj.",
year = "2007",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/6684",
abstract = "The adsorption of organic electrolytes from aqueous solutions on various adsorbents has been frequently investigated because of its importance in water purification. Phenol and substituted phenols are very common contaminants of water. In this paper, the adsorption results of some weak organic electrolytes (hydrochinon, phloroglucin and acidum gallicum) from aqueous solutions on silica are presented. The adsorption of the organics was investigated by the batch method. Effects of solution pHs (in the 2-10 range) and concentrations of these compounds on the adsorption were investigated. In the case of acidum gallicum, adsorption isotherms (in the 2-6 pH range) were determined. The obtained results indicate that the amount of adsorbed acidum gallicum increases with its increasing concentration. The maximum adsorption was recorded at pH=2-3 (pH equal to pH(pzc) of SiO2) with acidum gallicum molecule being undissociated (pK(a)= 4.41). The experimental data were fitted with different adsorption isotherms models. The maximum amount of acidum gallicum adsorbed as well as the Freundlich constants of adsorption were calculated. The adsorption of hydrochinon and phloroglucin from aqueous solutions (in the investigated pH range) on silica was negligible.",
journal = "Materials Science Forum",
title = "Adsorption of some weak organic electrolytes from aqueous solutions on silica",
volume = "555",
pages = "195-+",
doi = "10.4028/www.scientific.net/MSF.555.195"
}
Milonjić SK, Zhigunova LK, Pavasovic VL. Adsorption of some weak organic electrolytes from aqueous solutions on silica. Materials Science Forum. 2007;555:195-+
Milonjić, S. K., Zhigunova, L. K.,& Pavasovic, V. Lj. (2007). Adsorption of some weak organic electrolytes from aqueous solutions on silica.
Materials Science Forum, 555, 195-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.195
Milonjić Slobodan K., Zhigunova L. K., Pavasovic V. Lj., "Adsorption of some weak organic electrolytes from aqueous solutions on silica" 555 (2007):195-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.195 .

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