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RISS 인기검색어
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- 저자 : Hatsue Minato Braatz (검색결과 2 건)
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철도정비부지 내 매립된 폐기물에 의해 중금속으로 오염된 토양의 인체위해성 평가
Hatsue Minato Braatz,정민정,문세흠,박진규 유기성자원학회 2019 유기물자원화 Vol.27 No.3
본 연구에서는 대규모 철도부지를 상업부지로 개발함에 따라 과거 부지 내부에 산업 폐기물 등이 부적절하게처리되어 중금속 폐기물로 오염된 토양의 Cu, Pb, Zn, Ni 에 대한 인체 위해성 평가를 수행하였다. 위해성 평가는토양의 복원 및 복원과정에서 필요한 고려요소를 도출하는데 주요한 과정이다. 본 연구에서는 위해성 평가를 위해환경부 위해성평가지침을 준용하여 노출농도 결정, 노출량 산정, 발암 및 비발암 위해도를 결정하였다. 이를 통해철도부지의 중금속 오염토양의 인체 위해성 평가 결과를 제시하였다. 노출농도 산정결과 토양내 중금속 함량은621.3 Cu mg/kg, 2,824.5 Pb mg/kg, 1,559.1 Zn mg/kg, 45 Ni mg/kg이고, 독성금속별 인체 노출량 결과, 노출경로별로는토양의 실외비산 > 토양섭취 > 토양 접촉 순으로 나타났으며, 오염물질별로는 Pb > Zn > Cu > Ni 순으로 나타났다. 발암위해도 평가 결과, USEPA에서 제시한 허용발암위해도(TCR > 10-6) 보다 높게 나타났으며, 독성위해도(비발암성) 평가 결과, HI 지수(HI< 1.0)도 성인 3.5, 어린이 4.85, Cu 1.94 ~ 2.16, Pb 1.37 ~ 2.90으로 나타났다. 따라서 대상부지의중금속으로 오염된 토양의 복원관리가 필요할 것으로 판단된다. This study carried out a human risk assessment of Cu, Pb, Zn and Ni contained in soil contaminated by improperly buried heavy metal wastes in railway sites. The purpose of the human risk assessment is to derive the need for soil remediation and factors that should be considered during soil remediation. Risk assessment was performed in accordance with the Environment Ministry's Risk Assessment Guidelines. The results of the human risk assessment of contaminated heavy metal soil contaminated by improperly buried waste in the railway site were presented after the process of determining exposure concentration, calculating exposure, and determining carcinogenic hazards. The heavy metal content of soil is 621.3 Cu mg/kg, 2,824.5 Pb mg/kg, 1,559.1 Zn mg/kg and 45 Ni mg/kg, which is the exposure concentration of the target contaminant. The results of human exposure according to exposure pathways were high in the order of soil outdoor dust >soil ingestion >soil contact, and Pb >Zn >Cu >Ni were higher in order of contaminant. The carcinogenic and noncarcinogenic risks of soil contaminated with heavy metal waste were higher than the allowable carcinogenic risks (TCR> 10-6) and the risk index (Hi < 1.0) suggested by USEPA. Therefore, the site needs to be remediated.
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SEM-EDS와 화학계량학 분석을 이용한 산업폐기물과 토양의 구분
Hatsue Minato Braatz,박진규,김란희,문세흠,정민정 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.8
Until a couple of years ago, industrial solid waste (ISW), which is produced in the process of maintaining and repairingmachines, was dumped below industrial areas, where it mixed with the soil. To redevelop such affected areas, ISW-soilmixing materials should be identified as components of industrial waste or soil to establish a strategy for waste treatment. However, proper identification of some industrial wastes (such as coal ash) and soil can be challenging and confusing. Therefore, in this study, we suggest a method to determine whether a material (referred to as “suspicious substance”) isa component of ISW or soil to achieve proper waste treatment. Samples were collected from a railroad depot. First, theelemental compositions of the suspicious substances were determined with scanning electron microscopy-energy dispersivespectroscopy. Second, the substances were grouped based on their chemical profiles by conducting hierarchical clusteranalysis. Finally, the elemental compositions of the soil samples obtained from the study site were compared to those ofthe groups to identify the soil.
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