Adsorption studies for the removal of hexavalent chromium using fly ash of waste to energy power plant
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Date
2013, 2013
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Publisher
Central University of Punjab
Abstract
Chromium is the most common pollutant discharged in industrial effluent and
reported to be present beyond permissible limits causing various health problems
like carcinogenicity. Therefore, it must be removed from industrial effluent before
its discharge. Several physico-chemical methods have been used for the removal
of Cr (VI) from industrial effluents. Adsorption using activated carbon is quite
efficient for the removal of Cr (VI) from industrial effluents. However, it is a costly
process and the regeneration of activated carbon is difficult. Hence, in the present
work, efforts have been made to explore the use of fly ash collected from the
‘Waste to Energy Power Plant’ as a low cost adsorbent. In order to maximize the
Cr (VI) removal from simulated aqueous solutions, effects of various parameters
(adsorbent dose, contact time, pH and initial metal ion concentration) on Cr (VI)
adsorption were investigated by batch adsorption experiments. By optimizing the
conditions for Cr (VI) adsorption using the fly ash, removal of hexavalent
chromium from the aqueous solution (10 μg Cr/ml) was increased from 4% to approx. 99%. This shows that fly ash of agricultural waste burning can be used as an adsorbent for the removal of Cr (VI) at low concentration.
Description
Keywords
Hexavalent Chromium, Fly Ash, Adsorption, Langmuir Isotherm, Adsorption Kinetics
Citation
Vaid, Upma (2013) Adsorption studies for the removal of hexavalent chromium using fly ash of waste to energy power plant