Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum

M. A. Rauf; Shahnaz M. Qadri; Sarmadia Ashraf; Karima M. Al-Mansoori

doi:10.1016/j.cej.2008.12.008

Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum

M. A. Rauf, Shahnaz M. Qadri, Sarmadia Ashraf, Karima M. Al-Mansoori

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

96 Citations (Scopus)

Abstract

Gypsum was investigated as an inexpensive and efficient adsorbent to remove Toluidine Blue from aqueous solution. The adsorption studies were carried out at room temperature. Batch mode experiments were conducted at 25 °C to study the effects of pH and initial concentration of Toluidine Blue. The adsorption data was analyzed by using the Langmuir, Freundlich and Tempkin isotherm models and was found to give better results with respect to Langmuir equation. The maximum monolayer adsorption capacity was found to be 28 mg of the dye per gram of gypsum. The data were also studied in terms of their kinetic behavior and was found to obey the pseudo second order equation.

Original language	English
Pages (from-to)	90-95
Number of pages	6
Journal	Chemical Engineering Journal
Volume	150
Issue number	1
DOIs	https://doi.org/10.1016/j.cej.2008.12.008
Publication status	Published - Jul 15 2009

Keywords

Adsorption
Dye
Gypsum
Kinetics
Toluidine Blue

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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10.1016/j.cej.2008.12.008

Cite this

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title = "Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum",

abstract = "Gypsum was investigated as an inexpensive and efficient adsorbent to remove Toluidine Blue from aqueous solution. The adsorption studies were carried out at room temperature. Batch mode experiments were conducted at 25 °C to study the effects of pH and initial concentration of Toluidine Blue. The adsorption data was analyzed by using the Langmuir, Freundlich and Tempkin isotherm models and was found to give better results with respect to Langmuir equation. The maximum monolayer adsorption capacity was found to be 28 mg of the dye per gram of gypsum. The data were also studied in terms of their kinetic behavior and was found to obey the pseudo second order equation.",

keywords = "Adsorption, Dye, Gypsum, Kinetics, Toluidine Blue",

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note = "Funding Information: The authors would like to thank the UAE University Scientific Research Affairs Unit for supporting this work through research project number 01-03-2-11/08.",

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AU - Rauf, M. A.

AU - Qadri, Shahnaz M.

AU - Ashraf, Sarmadia

AU - Al-Mansoori, Karima M.

N1 - Funding Information: The authors would like to thank the UAE University Scientific Research Affairs Unit for supporting this work through research project number 01-03-2-11/08.

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N2 - Gypsum was investigated as an inexpensive and efficient adsorbent to remove Toluidine Blue from aqueous solution. The adsorption studies were carried out at room temperature. Batch mode experiments were conducted at 25 °C to study the effects of pH and initial concentration of Toluidine Blue. The adsorption data was analyzed by using the Langmuir, Freundlich and Tempkin isotherm models and was found to give better results with respect to Langmuir equation. The maximum monolayer adsorption capacity was found to be 28 mg of the dye per gram of gypsum. The data were also studied in terms of their kinetic behavior and was found to obey the pseudo second order equation.

AB - Gypsum was investigated as an inexpensive and efficient adsorbent to remove Toluidine Blue from aqueous solution. The adsorption studies were carried out at room temperature. Batch mode experiments were conducted at 25 °C to study the effects of pH and initial concentration of Toluidine Blue. The adsorption data was analyzed by using the Langmuir, Freundlich and Tempkin isotherm models and was found to give better results with respect to Langmuir equation. The maximum monolayer adsorption capacity was found to be 28 mg of the dye per gram of gypsum. The data were also studied in terms of their kinetic behavior and was found to obey the pseudo second order equation.

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KW - Dye

KW - Gypsum

KW - Kinetics

KW - Toluidine Blue

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Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum

Abstract

Keywords

ASJC Scopus subject areas

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