:: Volume 18, Issue 5 (Iranian South Medical Journal 2015) ::
Iran South Med J 2015, 18(5): 944-959 Back to browse issues page
Removal of Cr (VI) from aqueous solutions by nano-sized magnetite modified with SDS
Ali Akbar Babaei1, Zeinab Baboli 2, Mehdi Ahmadi1, Nematollah Jaafarzadeh1, Gholamreza Goudarzi1, Azar Mostufi3
1- Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2- Department of Environmental Health Engineering, Behbahan facult of Medical sciences, Behbahan, Iran. , baboliz87@gmail.com
3- Department of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Abstract:   (4394 Views)

Background: Contamination of aquatic bodies with heavy metals is a serious environmental problem. Chromium is a common contaminant in ground and surface water, soil and wastewater. The aim of this study was to use magnetite nanoparticles modified by sodium dodecyl sulphate (SDS) for removal of hexavalent chromium from aqueous solutions and various factors affecting the uptake behavior such as pH, contact time, initial concentration of metal ions, adsorbent concentration, were studied.

Materials & Methods: SDS modified magnetite nanoparticles were prepared by co-precipitation, and characterized by X-ray diffraction, SEM scaning electron microscopy. The XRD diffractogram showed purity of the magnetite nanoparticles and the SEM image showed that the modified magnetite particles were 50 nm.

Results: The results showed that highest adsorption (99.7%) for Cr(VI) was occurred at pH=4, adsorbent dosage 2 g/L, initial concentration Cr(VI) 10 mg/L and contact time 60 min. The adsorption data was correlated to different non-linear isotherm and kinetic models and the data fitted better to the Freundlich isotherm model. The kinetics of the Cr(VI) adsorption followed Ho (Pseudo-second-order) model.

Conclusion: The SDS modified magnetite nanoparticles appears to be very effective at removing the Cr(VI) from aqueous solution.

Keywords: SDS modified magnetite nanoparticles, Cr(VI), Adsorption, Isotherm, kinetic
Full-Text [PDF 1215 kb]   (2292 Downloads)    
Type of Study: Original | Subject: Public Health
Received: 2014/07/5 | Accepted: 2014/09/22 | Published: 2015/11/8



XML   Persian Abstract   Print



Volume 18, Issue 5 (Iranian South Medical Journal 2015) Back to browse issues page