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Received November 22, 2004
Accepted February 17, 2005
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제염 폐액에서 바나듐- 및 철-피콜리네이트 착화물의 평형분배 모사
Simulation on the Distribution of Vanadium- and Iron-Picolinate Complexes in the Decontamination Waste Solution
한국원자력연구소 핵화공연구부, 305-353 대전시 유성구 덕진동 150 1한국원자력연구소 제염해체기술개발부, 305-353 대전시 유성구 덕진동 150 2한국과학기술원 생명화학공학과, 305-705 대전시 유성구 구성동 373-1
Division of Nuclear Chemical Engineering Research, Korea Atomic Energy Research Institute, 150, Duckjin-dong, Yuseong-gu, Daejeon 305-353, Korea 1Division of Decontamination and Decommissioning Technology Development, Korea Atomic Energy Research Institute, 150, Duckjin-dong, Yuseong-gu, Daejeon 305-353, Korea 2Department of Chemical and Biomolecular Engineering, Korea Advanced Institute Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea
njbshim@kaeri.re.kr
Korean Chemical Engineering Research, February 2005, 43(1), 33-38(6), NONE Epub 3 March 2005
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Abstract
피몰리네이트 착화제가 들어있는 제염 폐액에서 바나듐 및 철 이온종의 평형분배 거동을 pH 값과 조성이 다른 여러 조건에서 모사하였다. 피콜리네이트 대 바나듐의 몰비를 일정한 값으로 고정하고 금속 이온의 농도를 변화시킬 경우 평형분배 곡선의 형태는 바나듐에 대한 피콜리네이트의 농도가 6배인 고농도 및 3배인 저농도 LOMI 제염 조건의 용액에서 모두 크게 바뀌지 않는다. 그러나 저농도 피콜리네이트 조건의 용액에서는 철(II)-피콜리네이트의 평형분배 곡선의 형태가 많이 변화하였는데, 이와 같은 현상은 용액에 들어잇는
The distribution of vanadium and iron ionic species in the presence of picolinate ligand has been simulated at various conditions with different pH values and compositions in the decontamination waste solution. In spite of variations of metal concentration in the decontamination solution, the shape of distribution diagrams were not changed greatly at both high (the molar ratio of picolinate to vanadium is 6) and low (the molar ratio is 3) LOMI decontamination conditions. However, in the solution of low-picolinate condition the shape of the distribution diagram of iron(II)-picolinate complexes was changed significantly. This phenomenon is attributed to the shortage of relative amount of picolinate ligand to iron existed in the solution, and originated from the difference in stability constants for complexes formed between vanadium(III) and iron(II) species with picolinate ligand. The distribution diagrams obtained in this study can be applied very usefully to the prediction or understanding the reaction phenomena occurred at various conditions in the course of the LOMI waste treatments such as an ion exchange operation.
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Perrin DD, Sayce IG, Talanta, 14, 833 (1967)
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