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건축자재 라돈 방출률 평가를 통한 공동주택 내 라돈 기여율 평가
홍형진(Hyungjin Hong),최지원(Jiwon Choi),윤성원(Sungwon Yoon),김희천(Heechun Kim),이철민(Cheolmin Lee) 한국환경보건학회 2021 한국환경보건학회지 Vol.47 No.5
Background: This study evaluated the radon contribution rate through an evaluation of the exhalation rate of radon from building materials. Objectives: This study compared and evaluated the computation of the radon contribution rate based on each different exhalation rate in a building. Methods: The six demonstration houses that are the subject of this study are wall structures or Rahmen structures, and include demonstration houses similar to general residential environments and non-finishing houses with some walls exposed. Results: The highest exhalation rate was found at 62.98 Bq/㎡ per day from the non-finishing floor, and the second highest exhalation rate was from stone materials at 58.76 Bq/㎡ per day. Based on this result, investigating the contribution rate of building materials derived from building materials among indoor radon concentrations, house three was the highest at 81.7%, and house one was confirmed to be 33.96%. Conclusions: It can be judged that the effect of exposed concrete and stone is high, and that it is possible to reduce radon emitted from indoor building structures by controlling the indoor materials.
실내·외 실시간 모니터링을 활용한 폼알데하이드 및 미세먼지(PM<sub>10</sub>, PM<sub>2.5</sub>)의 거주시간별 노출 및 위해도 평가
윤단기,남궁선주,공혜관,홍형진,임희빈,박시현,이혜원,이정섭,이철민,Yoon, Danki,Namgoung, Sunju,Kong, Hyekwan,Hong, Hyungjin,Lim, Huibeen,Park, Sihyun,Lee, Hyewon,Lee, Jungsub,Lee, Cheolmin 한국환경보건학회 2019 한국환경보건학회지 Vol.45 No.6
Objectives: The purpose of this study was to suggest methods to investigate continuous monitoring of concentration levels and assess the exposure of individuals considering the actual time activity of residents for formaldehyde and particulate matter (PM10, PM2.5) in the indoor and outdoor air of a house, assess the health risks of children and adults based on the results of the exposure assessment, and provide basic data on studies for assessing exposure and health risks in Korea in the future. Methods: The concentration levels of formaldehyde and particulate matter were measured in a family home in Gyeonggi-do Province from April 25 to July 31, 2019, using electrochemical sensors (formaldehyde) and light scattering sensors (PM10, PM2.5). Risk assessment by the duration of exposure by time activity was performed by dividing between weekdays and weekends, and indoors and outdoors. Results: The greatest level of carcinogenic risk from inhaling formaldehyde was indoors during the weekdays for both children and adults. For children, the risk was at 7.5 per approximately 10,000 people, and for adults, the risk was at 4.1 per approximately 10,000 people. PM10 and PM2.5 also showed the greatest values indoors during the weekdays, with children at 1.7 people and 1.4 per approximately 100 people, respectively, and adults at 8.2 per approximately 1,000 and 1.8 per approximately 100 people, respectively. Conclusions: The risks of formaldehyde, PM10 and PM2.5 were shown to be high indoors. Therefore, consideration of exposure assesment for each indoor pollutant and management of indoor air quality is necessary.
최지원(Jiwon Choi),홍형진(Hyungjin Hong),이정섭(Jeongsub Lee),유주희(Juhee Yoo),박보람(Boram Park),김가현(Gahyun Kim),윤성원(Sungwon Yoon),이철민(Cheolmin Lee) 한국환경보건학회 2021 한국환경보건학회지 Vol.47 No.4
Background: This study was conducted to provide background information for the proper management of radon contamination in apartments using mechanical ventilation facilities in residential environments. Objectives: To this end, this study compared and evaluated changes in radon concentrations based on different operating intensities of mechanical ventilation with or without natural ventilation. Methods: For the continuous measurement of radon concentrations, an RAD7 instrument was installed in four apartments equipped with a ventilation system. The measurements were done for comparison of ventilation types and different ventilation intensities (“high”, “middle”, “low”). Results: The results confirmed that both mechanical and natural ventilation sufficiently reduced the radon concentration in the apartments. In particular, mechanical ventilation at “high” intensity was the most effective. Natural ventilation combined with mechanical ventilation and then natural ventilation alone were the second and the third most effective, respectively. Conclusions: When using ventilation to reduce indoor radon concentrations, it is most effective to operate mechanical ventilation (“high”) or natural ventilation and mechanical ventilation at the same time. In cases where mechanical ventilation is available alone, it is recommended to operate it at a minimum of “middle” intensity.