Biosorption of chromium ion by biomass of Ginger

Today Environmental pollution is one of the important issues that different communities face. Human being in his daily and industrial activities inter large amounts of industrial pollutants into the environment [1]. Various heavy metals are of the environmental pollutants and due to toxicity and accumulation features are in attention for the health aspects.Today the use of bio sorbents for the treatment of materials is highly regarded due to economic and environmental sustainability. The aim of this study is to evaluate the rate of heavy metal chromium absorption by the biomass ginger [2].In this study, which is conducted in laboratory scale, first, the ginger powder was prepared in several stages. Then chromium removal efficiency was determined by varying factors under different conditions including pH, contact time, initial concentration of ion and adsorbent dosage. The Langmuir and Freundlich isotherms were evaluated.The results show that the maximum amount of biomass removed by Ginger chromium is in optimum conditions for pH 4.5 , 60 minutes contact time, initial concentration of 20 ppm and adsorbent dosage is 2.5 g. The best chrome adsorption isotherm was determined for Freundlich model.The results indicate that ginger biomass can be used as a suitable absorbent for removing chromium from aqueous solution. Sample solution pH and the amount of bio sorbents are two factors which have the greatest effect on the efficiency of extraction.