Removal of Cr (VI) from Aqueous Solution using Teak

Abstract:- Cr (VI) is highly toxic metal ion and considered as a priority pollutant released from various chemical industries like electroplating mixing activities, smelting, battery manufacture, tanneries etc. Effluents have been excessively released into the environment due to rapid industrialization and have created a global concern. Unlike organic wastes, Cr (VI) effluents are non biodegradable and they can be accumulated in living tissues, causing various diseases and disorders. Therefore they must be removed before discharge. In the present paper, the experimental results carried out in batch adsorption process using treated Teak Wood Saw Dust with synthetic samples prepared in laboratory were presented. The various parameters such as solution PH, initial chromium concentration, and adsorbent dosage on the adsorption of Cr (VI) were studied and presented. It was found that the adsorption data were fitted well by Langmuir isotherm and the Langmuir adsorption capacity was estimated as 23.52 mg/ g for Teak wood saw dust. The maximum removal of Cr (VI) above 99 % was observed at PH of 4 for Teak wood saw dust in 100ppm Cr (VI) solution. Index-Terms:- Chromium (VI), Teakwood Sawdust, low cost adsorbent, adsorptio