 The study investigated the biosorption of strontium-2 onto sargassum sp using a batch system. The effects of various parameters such as temperature, initial metal ion concentration, biomass treatment, biosorbent dosage, and pH were examined. The results showed that the optimum conditions for maximum biosorption were achieved when the initial pH was 7.2, the initial strontium concentration was 300 mg per litre, the biomass treatment was magnesium, the biosorbent dosage was 0.1g in 100 ml metal solution, and the temperature was 25 degrees Celsius. The biosorption capacity was found to be 103.95 mg per g under these conditions. The biosorption process followed the pseudo-second-order kinetic model and the adsorption process was described by the Langmuir and Freundlich isotherm models. This article was authored by F. Solomani, M. H. Karni, H. Palavanzad, and others.