Author(s): Afkhami A, Moosavi R
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Abstract The adsorption of Congo red (CR) onto maghemite nanoparticles (gamma-Fe(2)O(3)) and its desorption was investigated. The adsorption capacity was evaluated using both the Langmuir and Freundlich adsorption isotherm models. Maghemite nanoparticles (gamma-Fe(2)O(3)) 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.
This article was published in J Hazard Mater
and referenced in Journal of Petroleum & Environmental Biotechnology