title: Biotechnological potential of Azolla filiculoides for biosorption of Cs and Sr: Application of micro-PIXE for measurement of biosorption.
abstract: The presence of Cs and Sr in culture medium of Azolla filiculoides caused about 27.4% and 46.3% inhibition of biomass growth, respectively, in comparison to A. filiculoides control weight which had not metals. Biosorption batch experiments were conducted to determine the Cs and Sr binding ability of native biomass and chemically modified biosorbents derived from Azolla namely ferrocyanide Azolla sorbents type 1 and type 2 (FAS1 and FAS2) and hydrogen peroxide Azolla sorbent (HAS). The best Cs and Sr removal results were obtained when A. filiculoides was treated by 2M MgCl(2) and 30ml H(2)O(2) 8mM at pH 7 for 12h and it was then washed by NaOH solution at pH 10.5 for 6h. Pretreatment of Azolla have been suggested to modify the surface characteristics which could improve biosorption process. The binding of Cs and Sr on the cell wall of Azolla was studied with micro-PIXE and FT-IR.
authors.affiliation: Department of Nuclear Biotechnology, Nuclear Science Research School, Nuclear Science and Technology Research Institute, North Karegar Street, Tehran 11365-3486, Iran. saeid_ghm@yahoo.com
authors.forename: Saeid
authors.initials: S
authors.lastname: Ghorbanzadeh Mashkani
authors.forename: Parisa
authors.initials: P
authors.lastname: Tajer Mohammad Ghazvini
mesh_terms: D018533:Biomass; D001709:Biotechnology; D002586:Cesium / Q000378:metabolism*; D003470:Culture Media; D029624:Ferns / Q000254:growth & development / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013057:Spectrum Analysis / Q000379:methods; D013324:Strontium / Q000378:metabolism*; D014965:X-Rays
chemical_list: D003470:Culture Media; D002586:Cesium; D013324:Strontium