Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 174, Issue 1-3, Pages 398-403Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.09.066
Keywords
Congo red adsorption; Maghemite nanoparticles; Waste water samples
Categories
Funding
- Bu-Ali Sina University Research Council
- Center of Excellence in Development of Chemical Methods (CEDCM)
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The adsorption of Congo red (CR) onto maghemite nanoparticles (gamma-Fe2O3) and its desorption was investigated. The adsorption capacity was evaluated using both the Langmuir and Freundlich adsorption isotherm models. Maghemite nanoparticles (gamma-Fe2O3) were prepared easily in a surfactant-less microemulsion by co-precipitation method. The size of the produced maghemite nanoparticles was determined by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). Synthesized maghemite nanoparticles showed the highest adsorption capacities of CR compared to many other adsorbents and would be a good method to increase adsorption efficiency for the removal of CR in a wastewater treatment process. The maximum adsorption occurred at pH 5.9. The Langmuir adsorption capacity (q(max)) was found to be 208.33 mg g(-1) of the adsorbent. (C) 2009 Elsevier B.V. All rights reserved.
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