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KMID : 1171820050200020047
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Journal of Environmental and Sanitary Engineering
2005 Volume.20 No. 2 p.47 ~ p.55
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Removal of Uranium in Water by Beads of Chitosan the Graft - Copolymerized with Itaconic Acid
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Kang Soo-Jung
Kim Nam-Ki
Kim Jae-Woo
Han Sang-Mun
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Abstract
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The World Health Organization(WHO, 1998) and the United States Environmental Protection Agency (USEPA, 1992) recommended 2 ㎍ uranium/ℓ in drinking water as a guideline. The Korea Institute for Environmental Research recently reported that the radioactive pollution in ground water was almost negligible in Korea(1999~2002). Cs were cast into beads(2 ㎜ in wet form) and treated with hexamethylene diisocyanate for stability in acidic aqueous solution through cross-linking of the beads surfaces. The removal study was carried out in a static batch system and a flow system. In the static system, a certain amount of sample water was confined in a vessel and beads(dry weight 0.5 g) were packed into it in order to adsorb uranium for a certain period of time. Afterwards the remaining uranium in water vessel was determined by inductively coupled plasma mass spectrometry. The effective pH range was 4 to 8. The smaller the size of beads, the better the removal efficiency. Furthemore, the lower the flow rates, the higher the removal efficiency. The results showed that chitosan beads can be effectively used for the removal of uranium contained in water.
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