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Research Paper | July 1, 2015

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Removal of environmental pollutants azo dye Acid Red 18 in aqueous solution using adsorbent activated carbon of walnut shell

Alireza Garousin, Saeed Jameh Bozorghi, Reza Moradi

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J. Bio. Env. Sci.7(1), 120-127, July 2015

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Abstract

In this paper, removal of Acid Red 18 dye (AR18) from aqueous solutions using activated carbon of walnut shell (ACWS) adsorbent was studied. The prepared ACWS adsorbent was characterized by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area analysis. The kinetic and isotherm of dye adsorption was studied. The effects of operational parameter such as: adsorbent dosage, pH and contact time on the process were studied and optimized. The optimal amount of adsorbent dosage 0.3 g, pH= 5 and contact time 15 min respectively. The results showed that the dye adsorption onto adsorbent followed Freundlich isotherm. Adsorption kinetics of AR18 dye onto the adsorbent followed the pseudo- first-order kinetic model. The results showed that ACWS adsorbent might be a suitable alternative to remove dye from colored aqueous solutions.

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Removal of environmental pollutants azo dye Acid Red 18 in aqueous solution using adsorbent activated carbon of walnut shell

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