Journal of Pure and Applied MicrobiologyVol. 8 No. Special Edition Nov. 2014

Utilization of Algal Spirogyra sp in Environmental Cleanup: A Malachite Green Dye Biosorption Study

S.M. Yakout1,2*, A.A. Abdeltawab and Ibrahim M. Aziz1

1Biochemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia. 2Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt. 3Chemistry Department, College of Science, King Saud University, P.O. Box, 2455, Riyadh 11451, Kingdom of Saudi Arabia. 4Chemical Engineering Department, Tabbin Institute for Metallurgical Studies, Cairo 11413, Egypt.

Received on 20 July 2014 and accepted on 02 September 2014

 

ABSTRACT

Spirogyra sp biomass used for bioremediation of malachite green dye from aqueous solution. Biosorption process has been investigated as a function of pH, contact time and equilibrium. The adsorption is strongly dependent on pH of the medium where the removal efficiency increases as the pH turns to alkaline range. This reveals the basic nature of the Malachite green and acidic nature of the Spirogyra sp biomass. Langmuir model gave the best fitting to the biosorption data. Bioremediation results shows that Spirogyra sp has accumulated varying amount of malachite green dye intracellularly and could be employed for the removal of dyes from spent industrial effluents before discharging it into the environment.

Keywords : Malachite green, Biosorption isotherm, Equilibrium Kinetic.