Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh, India
*Author for correspondence: E-mail: rsingh2@amity.edu
Online published on 16 February, 2019.
The bisorption potential and kinetics of Cr (VI) using live and dead cells of Scenedesmus rubescens have been explored for the first time in the present work. Ideal conditions for the biosorption were found to be: pH 2 agitated at 90 rpm and at a dose of 0.8 g L−1 for both live and dead S. rubescens. For the initial Cr (VI) concentration ranging from 5 mg L−1 to 90 mg L−1, the experimental results showed that the metal adsorption capacity increased while the removal efficiency of Cr (VI) decreased with an increase in the initial Cr (VI) concentration. The results fitted well with Sips and Redlich-Peterson isotherm models and the biosorption mechanism was explained well with the pseudo-second-order model. Lastly, the phytotoxicity assay of the treated aqueous solution was performed on the Vigna radiata seeds, which confirmed its suitability for agricultural purpose.
Scenedesmus rubescens, Cr (VI), biosorption, adsorption isotherm, kinetics, phytotoxicity
