• Dr. Ch. A. I. Raju
• K. Satti Babu

The agile industrial activity during last three decades is greatly contributing to an increased dispersion of toxic elements in natural environments, mainly in aquatic systems. The present study deals with the biosorption of Congo red dye with Sargassum vulgare powder by single step optimization process. The parameters pH (2–8), Agitation time (5–180 min), Size of biosorbent (53–152 µm), Biosorbent dosage (10–80 g/L), Initial CR dye concentration (20–200 mg/L), Temperature (283–323 K) are studied carefully. Under this study the maximum biosorption of CR dye was observed at the optimum conditions of pH 6.0, Agitation time 60 min, Size of biosorbent 53µm, Biosorbent dosage 35 g/L, Initial CR dye concentration 20 mg/L and Temperature 3030C. Lagergren first order kinetics fitted well for CR dye biosorption. The fit of isotherms are in the order of Freundlich , Langmuir and Temkin. The thermodynamic study was well presented by VantHoff equation and plot. As the H (enthalpy) is positive, the biosorption is endothermic. The negative value of G (Gibbs Free Energy) indicated the spontaneity of biosorption.

CR, Sargassum vulgare, CCD

"Sorption of Synthetic Congo red Dye using Sargassum vulgare Powder and Optimization using Central Composite Design ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 3, page no.1265-1281, March-2018, Available :http://www.jetir.org/papers/JETIR1803243.pdf

"Sorption of Synthetic Congo red Dye using Sargassum vulgare Powder and Optimization using Central Composite Design ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 3, page no. pp1265-1281, March-2018, Available at : http://www.jetir.org/papers/JETIR1803243.pdf