International Symposium on
Drylands Ecology and Human Security

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Biosorption of Stable Strontium and Strontium-90 (Radioactive) Using Cystoseira Indica Brown Alga in the
Environmental Pollution Removal

Reza Dabbagh1,2*, Hossein Ghafourian2, Akbar Baghvand1, Gholam Reza Nabi1, Hossein Riahi3, Bahram Salimi4

1 Faculty of Environment, University of Tehran, Iran
* e-mail:
2 Nuclear Research Center, Atomic Energy Organization of Iran, Iran
3 Biology Department, Shahid Beheshti University, Iran
4 Jaber Ebne Hayyan Lab., Atomic Energy Organization of Iran, Iran



Biosorption of stable strontium (  F2a  ) 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 F2a  and  respectively. More biomass values and increasing F2a concentration and activity caused to rising F2a and removal. Dynamic capacity was 14.17 mg/g dry.wt ( F3  : 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.