International Symposium on
Drylands Ecology and Human Security
Biosorption of Stable Strontium and Strontium-90 (Radioactive) Using Cystoseira Indica Brown Alga in the
Reza Dabbagh1,2*, Hossein Ghafourian2, Akbar Baghvand1, Gholam Reza Nabi1, Hossein Riahi3, Bahram Salimi4
1 Faculty of Environment, University of Tehran, Iran
Biosorption of stable strontium ( ) and strontium-90 ( , radioactive) by Cystoseira indica Thivy brown alga have been studied in this research. Optimum sorption pH is 9±0.3 and the most sorption capacity has been seen after 6 hours contact time. On the basis of Langmuir isotherm, maximum bisorption capacity were 26.67 mg/g dry.wt and 10526 Bq/g dry.wt and so Langmuir coefficient were 0.017 and 0.00006 for and respectively. More biomass values and increasing concentration and activity caused to rising and removal. Dynamic capacity was 14.17 mg/g dry.wt ( : 160.97mL/g) in the test column. There is no change in the biomass sorption capacity after 5 times sorption and desorption experiments using CaCl2, NaCl, CH3COOH and EDTA.