Volume 11, Issue 2 (6-2015)
HSR 2015, 11(2): 398-410 |
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Moussavi G, Zhiyani F, Alahabadi A. Use of carbon activated with NH4Cl for Cr(VI) removal from the contaminated waters: kinetic and isotherm. HSR 2015; 11 (2) :398-410
URL: http://hsr.mui.ac.ir/article-1-772-en.html
URL: http://hsr.mui.ac.ir/article-1-772-en.html
1- Department of Environmental Health Engineering, Tarbiat Modares University, Tehran, Iran
2- Department of Environmental Health Engineering, Sabzevar University of Medical Sciences, Sabzevar, Iran
2- Department of Environmental Health Engineering, Sabzevar University of Medical Sciences, Sabzevar, Iran
Abstract: (830 Views)
Background: Chromium is one of heavy metals thatpresents in industrial effluents. Due to the negative effects of chromum on living organisms and environment its concentration in effluents that discharge to receving ecosystem must be decreased. The aim of this study was to find out the efficiency of NH4Cl-induced activated carbon (NAC) for the removal of chromium-VI from aqueous solutions and its comparison with commercial activated carbon (SAC).Methods: In this Study, the effects of pH, initial concentration of chromium-VI, adsorbent dose and contact time on the adsorption process were investigated. Adsorption isotherm and kinetic of NAC and SAC for removal of Cr-VI were also determined.Findings The result showed that NAC removed more than 90% of Cr-VI with its inicial concentration of 50 mg/l, optimum dose of 1 gr/L NAC, at pH 2 and 30 minute contact time. The adsorption kinetics fitted well with the pseudo second-ordermodel; however, the adsorption isotherm could be described by the Langmuir model. The maximum adsorption capacity for NAC and SAC was obtained 142.85 and 63.69 mg/g, respectively.Conclusion: The result showed that NAC compared with SAC was an effective and inexpensive adsorbent for removing chromium-VI from contaminated waters.Key Words: Adsorption, Activated Aarbon, Chromium (VI), Isotherm
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2015/06/15 | Published: 2015/06/15
Received: 2020/07/16 | Accepted: 2015/06/15 | Published: 2015/06/15
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