Intensification of strontium (II) ion biosorption on Sargassum sp via response surface methodology

F Soleymani; M H Khani; H Pahlevanzadeh; Younes Amini

doi:10.1038/s41598-023-32532-5

Intensification of strontium (II) ion biosorption on Sargassum sp via response surface methodology

Sci Rep. 2023 Apr 3;13(1):5403. doi: 10.1038/s41598-023-32532-5.

Authors

F Soleymani¹, M H Khani², H Pahlevanzadeh¹, Younes Amini³

Affiliations

¹ Chemical Engineering Department, Tarbiat Modares University, P.O. Box 14155-143, Tehran, Iran.
² Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-8486, Tehran, Iran. Mhkhani@aeoi.org.ir.
³ Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-8486, Tehran, Iran. Yamini@aeoi.org.ir.

Abstract

A batch system was employed to investigate the biosorption of strontium (II) on Sargassum sp. The biosorption of strontium on Sargassum sp was studied with response surface methodology to determine the combined effect of temperature, initial metal ion concentration, biomass treatment, biosorbent dosage and pH. Under optimal conditions, the algae's biosorption capacity for strontium (initial pH 7.2, initial strontium concentration 300 mg/l for Mg-treated biomass and biosorbent dosage 0.1 g in 100 mL metal solution) was measured at 103.95 mg/g. In our analysis, equilibrium data were fitted to Langmuir and Freundlich isotherms. Results show that the best fit is provided by the Freundlich model. Biosorption dynamics analysis of the experimental data indicated that strontium (II) was absorbed into algal biomass in accordance with the pseudo-second-order kinetics model well.