Abstract
AbstractTwo biomass agricultural waste materials; rice husks (RH) and potato peels (PP) were used as precursors for preparation of activated carbons by chemical activation using phosphoric acid for adsorption of hexavalent chromium [Cr(VI)] from tannery effluents. The prepared rice husk (RH–AC) and potato peel activated carbon (PP–AC) were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. Adsorption experiments were performed by varying pH, agitation speed, contact time, adsorbent dose and initial metal ion concentration. Freundlich, Langmuir and Temkin isotherms were used to analyze the equilibrium data obtained at different adsorption conditions. It was found that the adsorption isotherms were well fitted by the Freundlich equation and the adsorption process was found to follow pseudo-second-order rate kinetics. Adsorption results obtained show a maximum Cr(VI) uptake being attained at pH 2.0, with chromium removal efficiency of 99.88% and 99.52% for RH–AC and PP–AC, respectively. RH–AC and PP–AC are effective adsorbent for the removal of chromium(VI) ions from wastewater.
Funder
The World Academy of Sciences
Publisher
Springer Science and Business Media LLC
Reference51 articles.
1. Ahmad R, Kumar R, Haseeb S (2012) Adsorption of Cu2+ from aqueous solution onto iron oxide coated eggshell powder: evaluation of equilibrium, isotherms, kinetics, and regeneration capacity. Arab J Chem 5(3):353–359
2. Almohammadi S, Mirzaei M (2016) Removal of copper(II) from aqueous solutions by adsorption onto granular activated carbon in the presence of competitor ions. Adv Environ Technol 2:85–94
3. Anirudhan TS, Sreekumari SS (2011) Adsorptive removal of heavy metal ions from industrial effluents using activated carbon derived from waste coconut buttons. J Environ Sci 23(12):1989–1998
4. Awwad NS, Gad HMH, Ahmad MI, Aly HF (2010) Sorption of lanthanum and erbium from aqueous solution by activated carbon prepared from rice husk. Colloid Surf Biointerfaces 1(81):593–599
5. Barot NS, Bagla HK (2012) Eco-friendly wastewater treatment by cow dung powder Adsorption studies of Cr(III), Cr(VI) and Cd(II) using tracer technique. Desalinat Water Treat 38(1–3):104–113
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