Simultaneous removal of cesium and strontium using a photosynthetic bacterium, <i>Rhodobacter sphaeroides</i> SSI immobilized on porous ceramic made from waste glass
- 1 Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusa Gakuin University, Hiroshima, Japan
- 2 Meisui-Bio Research Institute, Hiroshima Kokusai Gakuin University, Hiroshima, Japan
- 3 Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusa Gakuin University, Hiroshima, Japan
- 4 Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusa Gakuin University, Hiroshima, Japan
- 5 Ohta-Kokan Co. Ltd., Hiroshima, Japan
- 6 Relation Creative Office Co. Ltd., Hiroshima, Japan
- 7 Ohta-Kokan Co. Ltd., Hiroshima, Japan
Abstract
This study investigated practical and simultaneous removal of cesium (Cs, initial concentration of 5 mg/L) and strontium (Sr, initial concentration of 5 mg/L) using a photosynthetic bacterium, Rhodobacter sphaeroides SSI, immobilized on recovery-type porous ceramic made from glass waste. When 4 - 8 pieces /L of SSI immobilized ceramic were added to synthetic sewage wastewater containing glucose, almost 100% of Cs and 57% - 61% removal of Sr was observed after 3 day’s aeration treatment. The high potassium (K) concentration in wastewater suppressed Cs removal, but did not affect Sr removal. Other substrates such as lactic, acetic, and propionic acids were useful for Cs and Sr removal. But, removal efficiencies were lower than about 50%. When the practical outdoor removal experiment carried out using1 m 3 vessel, almost 100% of Cs and 51% of Sr were removed like a laboratory experiment after 3 day’s aerobic treatment. After treatment, the SSI immobilized ceramic was recovered easily from water using an electromagnet. This SSI immobilized ceramic seem to remove radioactive Cs and Sr from water environments of Fukushima,Japan.
- No DU Hiroshima Project (2006) A world without uranium weapons: The ICBUW challenge, Godo Publishers, Tokyo (in Japanese), 6-158.
- Sasaki, K., Hara, C., Takeno, K., Okuhata, H. and Miyasaka, H. (2010) Metals related to radionuclides and heavy metal removal using photosynthetic bacteria immobilized recovery type porous ceramic. Japanese Journal of Water Treatment Boilogy, 46, 119-127.
- Watanabe, M., Kawahara, K., Sasaki, K. and Noparatnaraporn, N. (2003) Biosorption of cadmium ions using photosynthetic bacterium, Rhodobacter sphaeroides S and a marine photosynthetic bacterium, Rhodovulum sp. and their biosorption kinetics. Journal of Bioscience and Bioengineering, 95, 374-378. doi:10.1016/81389-1723(03)80070-1
- National Institute of Advanced Industrial Science and Technology (2011) Success in extraction of cesium from the soil using low concentrate acids. http://www.aist.go.jp/aist.j/press_release/pr2011/pr2011083
- Sugoh, T. (2012) Present condition of water pollution by radioactive materials and countermeasures. In: Saitoh, K. Ed., The Radioactive Contamination Countermeasures after the Great Eastern Japan Earthquake, NTS Publishers, Tokyo (in Japanese), 161-172.
- Takeshita, K. (2012) Development of treatment system for cesium polluted water. In: Saitoh, K. Ed., The Radioactive Contamination Countermeasures after the Great East Japan Earthquake, NTS Publishers, Tokyo (in Japanese), 173-181.
- Seko, N., Suzuki, S. and Yasaka, T. (2012) Cesium adsorption effect using high polymer adsorption materials such as crown ether. In: Saitoh, K. Ed., The Radioactive Contamination Countermeasures after the Great East Japan Earthquake, NTS publishers, Tokyo (in Japanese), 204-210.
- Haselwandter, K. and Berreck, M. (1988) Fungi as bioindicators of radiocesium contamination: Pre- and post- Chernobyl activities. Transactions of the British Mycological Society, 90, 171-174. doi:10.1016/S0007-1536(88)80085-8
- Avery, S. V., Codd, G. A. and Gadd, G., M. (1991) Caecations in the cyanobacterium Synechocystis PCC 6803. Journal of General Microbiology, 137, 405-413. doi:10.1099/00221287-137-2-405
- Tomioka, N., Utiyama, H. and Yagi, O. (1994) Cesium accumulation and growth characteristics of Rhodococcus erythropolis CS98 and Rhodococcus sp. strain CS402. Applied and Environmental Microbiology, 60, 2227- 2231.
- Sasaki, K., Morikawa, H., Kishibe, T., Mikami, A., Harada, T. and Ohta, M. (2012) Practical removal of radioactivity from sediment mud in a swimming pool in Fukushima, Japan by immobilized photosynthetic bacteria. Bioscience Biotechnology and Biochemistry, 76, 859-862. doi:10.1271/bbb.110853