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

Reza Dabbagh^1,2*, Hossein Ghafourian², Akbar Baghvand¹, Gholam Reza Nabi¹, Hossein Riahi³, Bahram Salimi⁴

¹ Faculty of Environment, University of Tehran, Iran
* e-mail: rdabagh@yahoo.com
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
 

Abstract

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.