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:: Volume 3, Issue 1 ( Winter 2016) ::
Environ. health eng. manag. 2016, 3(1): 1-7 Back to browse issues page
Adsorption of the reactive azo dyes onto NH4Cl-induced activated carbon
Sakine Shekoohiyan, Gholamreza Moussavi , Samira Mojab, Ahmad Alahabadi
Department of Environmental Health Engineering, Tarbiat Modares University, Tehran, Iran , moussavi@modares.ac.ir
Abstract:   (6706 Views)

Background: The efficacy of NH4Cl-induced activated carbon (NAC) was examined in order to adsorb RR198, an azo reactive model dye, from an aqueous solution.
Methods: The effects of pH (3 to 10), adsorbent dose (0.1 to 1.2 g/L), dye concentration and contact time on the adsorption efficiency were investigated.
Results: The results showed that the removal of dye was highest at a solution pH of 7 and a powder dose of 1.1 g/L. The 85.9%, 72.6% and 65.4% removal of RR198 was obtained for a concentration of 25, 50 and 100 mg/L, respectively, at a relatively short contact time of 30 minutes, and at optimum pH and NAC concentrations of 1 g/L. The experimental data for kinetic analysis illustrated a best fit to the pseudo-second-order model. The study data on equilibrium were modeled using Langmuir, Freundlich and Dubinin–Radushkevich models; the Langmuir equation provided the best fit for the data.
Conclusion: Therefore, the NAC appears to be an efficient and appropriate adsorbent for the removal of reactive azo dyes from waste streams.
 

Keywords: Azo dye, Adsorption, Modified activated carbon, Equilibrium, Isotherm, Kinetic
eprint link: http://eprints.kmu.ac.ir/id/eprint/25227
Full-Text [PDF 607 kb]   (2422 Downloads)    
Type of Study: Original Article | Subject: General
Received: 2016/03/14 | Accepted: 2016/03/14 | Published: 2016/03/14
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Shekoohiyan S, Moussavi G, Mojab S, Alahabadi A. Adsorption of the reactive azo dyes onto NH4Cl-induced activated carbon. Environ. health eng. manag.. 2016; 3 (1) :1-7
URL: http://ehemj.com/article-1-134-en.html


Volume 3, Issue 1 ( Winter 2016) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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