• Bulletin of Korea Environmental Preservation Association
• /
• v.11 no.9
• /
• pp.34-34
• /
• 1989

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 1998.04a
• /
• pp.231-232
• /
• 1998

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 1998.10a
• /
• pp.348-349
• /
• 1998

• Radioisotope journal
• /
• v.18 no.3
• /
• pp.95-99
• /
• 2003

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2016.10a
• /
• pp.531-532
• /
• 2016

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2006.04a
• /
• pp.549-551
• /
• 2006

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2003.11a
• /
• pp.360-361
• /
• 2003

대기오염물질의 장거리 이동에 관한 인구는 자연적으로 발생하는 오염물질과 인위적으로 발생하는 오염물질을 추적할 수 있다. 자연적인 것으로는 황사의 발생, 이동 및 침전 등이 있고, 인위적인 것으로 입자상물질, sulphate의 연구사례가 있다(정용승 등 1991). 그러나 중국에서 발생된 이러한 대기오염물질은 서해를 넘어 이동하면서 화학적 성분이 변화하기 때문에 대기오염물질의 장거리 이동을 명확하게 설명할 수 없는 한계를 가지고 있다. (중략)

• Journal of the Korean Society of Radiology
• /
• v.11 no.5
• /
• pp.297-302
• /
• 2017

Recently, building materials and air purification filters with eco-friendly charcoal are actively studying to reduce the concentration of radon gas in indoor air. In this study, radon reduction performance was assessed by designing and producing new panel-type activated carbon filter that can be handled more efficiently than conventional charcoal filters, which can reduce radon gas. For the fabrication of our panel-type activated carbon filter, first the pressed molding product after mixing activated carbon powder and polyurethane. Then, through diamond cutting, the activated carbon filter of 2 mm, 4 mm and 6 mm thickness were fabricated. To investigate the physical characteristics of the fabricated activated carbon filter, a surface area and flexural strength measurement was performed. In addition, to evaluate the reduction performance of radon gas in indoor, the radon concentration of before and after the filter passes from a constant amount of air flow using three acrylic chambers was measured, respectively. As a result, the surface area of the fabricated activated carbon was approximately $1,008m^2/g$ showing similar value to conventional products. Also, the flexural load was found to have three times higher value than the gypsum board with 435 N. Finally, the radon reduction efficiency from indoor gas improved as the thickness of the activated carbon increases, resulting in an excellent radon removal rate of more than 90 % in the 6 mm thick filter. From the experimental results, the panel-type activated carbon is considered to be available as an eco-friendly building material to reduce radon gas in an enclosed indoor environment.

• Journal of the Korean Society for Railway
• /
• v.3 no.2
• /
• pp.62-67
• /
• 2000

Modern people stay at indoor places about 90% of a day. Radon-222 is a gas produced by the radioactive decay of the element radium. And, radon is one of the major indoor air pollutants. Radon moves into the underground space through various routes and is considered to cause lung cancer by hurting the lung tissues. In this study, we measured the subway radon level at 9 stations of 3 lines. According to test results, we can figure out the concentration of radon by lines, times, and measuring points. So, it was found that ventilation conditions are the most important factors in the subway air quality. Finally, we suggested effective and economic management methods of air pollution in the subway.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2005.11a
• /
• pp.376-378
• /
• 2005