Serratia sp. ZF03: an efficient radium biosorbent isolated from hot-spring waters in high background radiation areas
| Autor: | Fatemeh Masoomi, Farideh Zakeri, Mohammad Reza Kardan, Majid Sadeghizadeh, Ali Atarilar, Kambiz Akbari Noghabi, Mohammad Reza Farshidpour |
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| Rok vydání: | 2010 |
| Předmět: |
Langmuir
Water Pollutants Radioactive Environmental Engineering Serratia Time Factors chemistry.chemical_element Bioengineering Iran Hot Springs Microbiology Radium Spectroscopy Fourier Transform Infrared Background Radiation Soil Pollutants Radioactive Freundlich equation Biomass Waste Management and Disposal Phylogeny biology Renewable Energy Sustainability and the Environment Biosorption Temperature Sorption General Medicine Hydrogen-Ion Concentration biology.organism_classification 16S ribosomal RNA Kinetics Biodegradation Environmental chemistry Adsorption Water Microbiology Bacteria Nuclear chemistry |
| Zdroj: | Bioresource technology. 101(23) |
| ISSN: | 1873-2976 |
| Popis: | The aim of this study is to isolate and characterize (226)Ra biosorbing indigenous bacterial strains from soils and hot-springs containing high concentrations of (226)Ra by using biochemical and molecular approaches. Fifteen bacteria were isolated and their phylogenetic affiliations were determined based on their 16S rRNA gene and the two most relevant hypervariable regions of this gene; V3 and V6 analysis. A pigmented Serratia sp. ZF03 strain isolated from the water with (226)Ra content of 50471 mBq l(-1), caused 70% removal of (226)Ra at a radioactivity level of 50 Bq ml(-1), after 5 min and 75-80% in equilibrium time of 1 h, depending on the particular biosorption system and experimental conditions studied. The biosorption equilibrium was described by Langmuir and Freundlich isotherm models. Kinetic studies indicated that the biosorption follows pseudo-second-order kinetics. Effect of different physico-chemical parameters on (226)Ra sorption, FTIR, SEM and TEM analysis were also investigated. |
| Databáze: | OpenAIRE |
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