• Title/Summary/Keyword: 탈염

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Study on Characteristics and Features of Re-corrosion on Archaeological Iron Nails after Conservation Treatments (철제관정의 보존처리 후 재부식 양상 및 특성 연구)

  • Lee, Hyeyoun;Park, Hyungho;Kim, Sujung;Yu, Jaeeun
    • Journal of Conservation Science
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    • v.28 no.4
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    • pp.343-351
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    • 2012

  • Excavated archaeological iron objects are prevented from being corroded going through desalination which slow down being corroded. However archaeological iron objects are liable to be corroded due to the high ionization tendency even though they are stored in environment restricted from corrosion factors. Iron objects could be deteriorated more than just excavated. Therefore this study investigated about the characteristic of re-corrosion and the effect on objects. In study, archaeological iron nails in storage for 4 years after conservation treatments were tested. Optical microscopy and X-ray photography for appearance, XRD, SEM-EDS, Raman spectroscopy for chemical composition, IC for chloride ions concentration inside iron nails were used. As results, iron nails carried out conservation treatments measured a high concentration of chloride ions after the long storage period. The form of objects were not in good condition such as broken or destroyed when the high chloride ions concentration was detected. In addition, the yellow and red powdery corrosion product were detected on the boundary between corrosion products and substrates and they were identified as akaganeite which is symptom of active corrosion.

  • https://doi.org/10.12654/JCS.2012.28.4.343 인용 PDF KSCI

Ion Exchange Modeling for Demineralizer in Nuclear Power Plants (원자력 발전소 이온교환수지탑 모델링)

  • 이인형;안문
    • Proceedings of the KAIS Fall Conference
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    • 2002.05a
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    • pp.140-143
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    • 2002

  • 연속 이온교환 평형 모델을 개발하여 원자력발전소 탈염기의 성능을 평가한 결과 특정이온의 누출 현상과 유입수 및 유출수중 이온농도 비율이 운전조건에 따라서 달라짐을 확인하였다. 본 모델은 국부 불완전 평형을 고려할 수 없으나 다성분 존재하의 경쟁적 이온교환을 묘사할 수 있는 장점을 가지고 있다.

Dechlorination of Atrazine using Zero Valent Iron($Fe^0$) under Neutral pH Condition (중성 pH조건에서 철($Fe^0$)을 이용한 Atrazine의 탈염소화)

  • Kim, Geon-Ha;Jeong, Woo-Hyeok;Choe, Seung-Hee
    • Journal of Korean Society of Environmental Engineers
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    • v.28 no.2
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    • pp.173-177
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    • 2006

  • Pesticides from diffuse pollution sources adsorbed in suspended particles flow into surface water and threats to the public health. In this research, dechlorination constants of Atrazine by zero valent iron were measured with addition of buffer solution for simulating buffer capacity of sediment. When initial concentration of Atrazine was 10, 30, and 50 mg/L, their dechlorination was explained using the pseudo-first order reaction. Dechlorination constants $K_{obs}$ were $3.21{\times}10^{-2}/d$ in average.

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