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Vol. 30 No. 8 (2018): Vol 30 Issue 8

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Removal of Orange G from Aqueous Solutions by Activated Carbon Obtained from Agricultural Wastes: Isotherm and Kinetic Studies

https://doi.org/10.14233/ajchem.2018.21350
Govindan Ramathilagam1
1Department of Chemistry, Raja Doraisingam Government Arts College, Sivaganga-630 561, India 2Department of Chemistry, Kamarajar Government Arts College, Surandai, Tirunelveli-627 859, India *Corresponding author: E-mail: thilaga0609@gmail.com
Kanakkan Ananthakumar2
1Department of Chemistry, Raja Doraisingam Government Arts College, Sivaganga-630 561, India 2Department of Chemistry, Kamarajar Government Arts College, Surandai, Tirunelveli-627 859, India *Corresponding author: E-mail: thilaga0609@gmail.com

Asian Journal of Chemistry, Vol. 30 No. 8 (2018): Vol 30 Issue 8

Abstract

We prepared activated carbon from an agricultural waste, kuppaimeni leaf (KPL, Acalypha Indica), karuvelai leaf (KVL, Prosopis juliflora) and bottle gourd shell (BGS, Lagenaria siceraria) powders to utilize them as adsorbents for the removal of an anionic dye, Orange G (OG) from aqueous solutions. The effect of various parameters such as initial dye concentration, time, pH and temperature were investigated in the adsorption studies of Orange G dye removal. The experimental values were in good agreement with the model predicted values. Adsorption data were modeled using Freundlich and Langmuir adsorption isotherms. The adsorption of Orange G dye by activated carbon obeys Langmuir isotherm. Adsorption kinetic data were also tested using pseudo-zero, first and second-order kinetics. Kinetic studies revealed that the adsorption follows pseudo-second-order reaction. SEM results showed that the surface of the activated carbon was turned from dark to light colour after dye adsorption.

Keywords

Orange G Adsorbents Adsorption isotherm Kinetics study
Ramathilagam1, G., & Ananthakumar2, K. (2018). Removal of Orange G from Aqueous Solutions by Activated Carbon Obtained from Agricultural Wastes: Isotherm and Kinetic Studies. Asian Journal of Chemistry, 30(8), 1857–1862. https://doi.org/10.14233/ajchem.2018.21350
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