Efficiency of Pomegranate Peels Powder on Adsorption of Hexavalent Chromium [Cr (VI)] from Industrial Wastewater

Abstract

The research is focusing on the use of pomegranate peels powder to reduce hexavalent chromium concentration in the industrial wastewater by batch processing adsorption. Estimated amount of potassium dichromate was dissolved in distilled water to get synthetic solution containing hexavalent chromium ions at a concentration of 40 mg/L. The effect of different parameters such as pH, mixing time, pomegranate peels powder dose, initial metal concentration on hexavalent chromium removal efficiency was investigated. Furthermore, Langmuir, Freundlich and Brunauer, Emett and Teller (BET) isotherm models were evaluated. The results indicate that the maximum hexavalent chromium removal was achieved at pH 2.5; equilibrium was attained at 150 minute with 96.7% Cr (VI) percentage removal, and the experimental results were in agreement with BET model