The three air quality monitoring sites, analysed simultaneously PM-10 and PM-2.5, ie. Ihyeondong in industrial area, Manchondong in residential area, Pyeongnidong in streetside, among 13 air quality monitoring sites in Daegu area, were investigated the concentration distribution characteristics of PM-2.5 and PM-10 in the last 2 years (2011~2012). PM-10 concentrations exceeded annual average reference value (50 µg/m 3 ) in Ihyeondong (52.5 µg/m 3 ) and Pyeongnidong (60.9 µg/m 3 ) but satisfied in Manchondong (44.9 µg/m 3 ). All PM-2.5 concentrations exceeded EPA annual standard value of the United States (15 µg/m 3 ) in three points, but also exceeded new control annual standard value (25 µg/m 3 ) coming into effect in 2015. 요약 : 대구지역의 13개 대기오염측정소 중 PM-10과 PM-2.5를 동시에 측정하는 3개 측정소 즉, 공업지역에 위치한 이현동, 주거지역에 위치한 만촌동, 도로변에 위치한 평리동 측정소를 대상으로 최근 2년간(2011~2012)의 자료를 이용하여 PM-10과 PM-2.5의 농도분포 특성을 연구하였다. PM-10 농도는 이현동(52.5 µg/m 3 )과 평리동(60.9 µg/m 3 ) 모두 연평균 기준치인 50 µg/m 3 을 초과하였고, 만촌동(44.9 µg/m 3 )은 기준치를 만족하였다. PM-2.5 농도는 세 지점 모두 미국의 EPA 연간기준치(15 µg/m 3 )를 초과하였으며, 우리나라에서 2015년부터 시행되는 PM-2.5의 연평균기준치(25 µg/m 3 )도 초과하는 수준이었다. 계절 별 변화를 보면, PM-10은
A total of 48 dust samples were collected from large shopping mall parking lots in Daegu metropolitan city in March 2011. Samples were sieved through a 100 µm mesh and the concentration of 14 elements have been determined using by ICP after acid extraction. Results showed that Ca, Fe, K, Mg, Mn, Na and V were affected by natural sources while Cd, Cr, Cu, Ni, Pb and Zn were affected by anthropogenic sources. The measured values were remarkably higher in components from natural sources than in components from anthropogenic sources. Anthropogenic trace element concentrations of ground roof dust were higher than those of ground and underground indoor dust. A large percentage of trace elements came from natural sources rather than anthropogenic sources. The percentage composition of chemicals of ground roof dust were higher than those of ground and underground indoor dust. This study showed that investigated parking lots were rarely contaminated with hazardous heavy metals. The heavy metal pollution of ground roof were higher than those of ground and underground indoors. The correlation analysis among trace elements suggest that components in ground roof were more highly correlated than those in ground and underground indoor. Also anthropogenic trace element levels were well correlated with parking lot age and parking density.
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