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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.51 no.2, 2018년, pp.87 - 97
안정필 (부경대학교 지구환경과학과) , 이민희 (부경대학교 지구환경과학과)
The cesium (Cs) removal from the contaminated water system has been considered to be difficult because the cesium likes to exist as soluble phases such as ion and complexes than the solid in water system. Many researches have focused on developing the breakthrough adsorbent to increase the cesium re...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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Cs-137에 의한 방사능 피해 주로 무엇 때문인가? | Ba137m은 강한 감마(γ)선을 내며 반감기가 2.55일인 안정한 Ba-137이 되는데, Cs-137에 의한 방사능 피해는 주로 Ba-137m에서 나오는 감마선 때문이다(USG et al., 2017). | |
세슘-137 원자핵이 베타(β−)붕괴를 거치면 어떤 것으로 전환되는가? | 원자력 발전과정에서 주요 핵연료인 우라늄이나 플루토늄이 중성자를 흡수하여 분열되면 분자량이 작은 여러 방사성원자들이 생성되는데, 핵분열 생성물 중 장시간 동안 주변 환경에 큰 위험을 끼치는 방사성 핵종 중의 하나가 반감기가 약 30년인 세슘-137(이후로는 “Cs-137”로 표기)이다(Gad and Pham, 2014). Cs-137 원자핵은 베타(β−)붕괴를 거쳐 질량수는 같으나 원자번호가 하나 더 큰 바륨(Ba) 원자핵으로 전환되는데, 이 때 생성되는 바륨 원자핵의 95 %는 준안정 상태인 Ba-137m이다. Ba137m은 강한 감마(γ)선을 내며 반감기가 2. | |
세슘의 특징은 무엇인가? | 세슘은 수용액상에서 다른 음이온과 착화물을 잘 형성하지 않아 대부분 양이온(Cs+) 상태로 안전하게 존재하여, 자연수 중의 pH 또는 이산화탄소 농도 등의 변화에 의해 다른 화학종으로 쉽게 바뀌지 않는다(Butterman et al., 2004). |
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