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J Korean Soc Environ Eng > Volume 36(11); 2014 > Article
J Korean Soc Environ Eng 2014;36(11): 747-752. doi: https://doi.org/10.4491/KSEE.2014.36.11.747
물속의 인공방사성핵종(I-131) 제거율 연구
정관조, 이경우, 김복순, 이수원, 이종규, 구아미
서울특별시 상수도연구원
Study on Removal of Artificial Radionuclide (I-131) in Water
Gwanjo Jeong, Kyungwoo Lee, Bogsoon Kim, Suwon Lee, Jonggyu Lee, Ami Koo
Waterworks Research Institute, Seoul Metropolitan Government
Corresponding author  Gwanjo Jeong ,Tel: 02-3146-1751, Fax: 02-3146-1874, Email: jgj730@seoul.go.kr
Received: July 16, 2014;  Revised: November 7, 2014;  Accepted: November 17, 2014.  Published online: November 30, 2014.
ABSTRACT
Iodine-131, an artificial radionuclide, mostly exists as iodide ion (131I-) and iodate ion (131IO3 -) in the water, and When a short time contacted, it could not be removed by poly aluminum chloride (PACl) and powdered activated carbon (PAC). Although the removal rate of iodine-131 was not related with turbidity of raw water, it showed linear relationship with contact time with PAC. With the mixture of PACl (24 mg/L or more) and PAC (40 mg/L or more), about 40% of iodine-131 could be removed. Iodine-131 could be removed little by sand filtration, but approximately 100% by granular activated carbon (GAC), both virgin-GAC and spent-GAC. Microfiltration process could remove little iodine-131 while reverse osmosis process could remove about 92% of iodine-131.
Key Words: Iodine-131, Radionuclide, Granular Activated Carbon (GAC)
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