Corresponding Author: Dr. T.V. Ramachandra
Energy & Wetlands Research Group, Centre for Ecological Sciences,
Indian Institute of Science, Bangalore 560 012, India
Web : http://wgbis.ces.iisc.ernet.in/energy/ Email : firstname.lastname@example.org or email@example.com
Tel: 91-080 22933099 /23600985,
Chromium (VI) is a major pollutant released during several industrial operations. In this paper, we discuss how tamarind (Tamarindus indica) pod shells, otherwise discarded as a waste material is used in the biosorption of Cr (VI) from aqueous solutions. Parameters like agitation time, adsorbent dosage and pH were studied at different initial Cr (VI) concentrations. The adsorption data fit well with Langmuir and Freundlich isotherm models. Desorption studies were performed at different concentrations of sodium hydroxide. The infrared spectra of the biomass revealed that hydroxyl, carboxyl and amide groups are involved in the uptake of Cr (VI).
Key words: Heavy metals, chromium, biosorption, tamarind pod shells, infrared spectra