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Mechanism and Removal Efficiency of C.I. Acid Blake 1 by Pumice Stone Adsorbent

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Author(s): M.R Samarghandi | M Noori Sepehr | M Zarrabi | M Norouzi | F Amraie

Journal: Iranian Journal of Health and Environment
ISSN 2008-2029

Volume: 3;
Issue: 4;
Start page: 399;
Date: 2011;
Original page

Keywords: Adsorption | Azo Dye | Batch study | Intra-particle diffusion | Pumice

ABSTRACT
"n "n "nBackgrounds and Objectives: Treatment of colored wastewater is one of the important challenges of environmental engineers. Adsorption process is a key option for removal of organic matter from wastewater. The aim of present work was to investigate pumice stone as an adsorbent for removal of Acid Black 1 from aqueous solution."nMaterials and Methods: Removal of Acid Black 1 by pumice stone was investigated. Acid Hyrdo Chloric(HCL) 1 N was used to increse adsorbent porosity. Various parameters such as pH, initial dye concentration and contact time were studied."nResults: Results showed that removal of Acid Black 1 was increased by increasing of contact time and initial dyeconcentration although it was decreased by increasing of pH. Experimental data was best fitted to Longmuir isotherm model (r2>0.98). Study of diffusion model revealed that intraparticle diffusion is rate-controlling step in removal of Acid Black 1 by pumice stone."nConclusion : The results indicated that pumice stone was a dominant adsorbent for Acid Black 1 removal.
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