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Potato peeled powder was used as a low-cost adsorbent to remove hexavalent chromium from aqueous solution

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Document pages: 7 pages

Abstract: Potato peel is a low-cost and renewable by-product of agricultural industry, which is used to remove hexavalent chromium from wastewater. Batch experiments were carried out with artificial effluent of potassium dichromate in deionized water. The effects of initial hexavalent chromium concentration, biosorbent dose and removal kinetics were discussed. The amount of adsorbent is 4   when the pH value is 2.5, g L is effective to completely remove metal ions within 48 minutes. The kinetic process of adsorption of Cr (VI) by potato skin powder was tested by pseudo first-order and pseudo second-order models and elovich kinetic equation. The experimental data were correlated and the kinetic parameters were determined. Adsorption data were correlated by Langmuir and freunlich isotherms. A maximum monolayer adsorption capacity of 3.28 mg g was calculated using the Langmuir adsorption isotherm, suggesting a functional group limited adsorption process. The results confirmed that potato peels are an effective biosorbent for the removal of hexavalent chromium from effluent.

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