대구광역시의 도로, 학교, 지하역사, 주택 등을 대상으로 축적먼지를 채취하여 100 ${mu}m$ 이하로 걸러서 산추출한 후 ICP로 14개 원소를 분석하였다. 미량원소성분 중 Ca, Fe, K, Mg, Mn, Na, V는 자연적인 발생원의 영향을 받고, Cd, Cr, Cu, Ni, Pb, Zn은 인위적인 발생원의 영향을 받고 있는 것으로 추정되었다. 미량원소성분의 농도는 자연적인 발생원 성분이 인위적인 발생원 성분보다 매우 높은 수준을 보였다. 특히 학교는 Ca과 Pb의 농도가 높았고, 지하역사는 Cu와 Zn의 농도가 높았다. 미량원소성분의 조성백분율은 실내인 지하역사 주택 학교가 실외인 도로보다 인위적인 발생원 성분을 많이 함유하였다. 또한 유해중금속성분의 오염도는 학교 주택 지하역사가 도로보다 높았고, 도시지역이 농촌지역보다 높은 전형적인 경향을 보였다. 미량원소성분간의 상관성은 흙먼지나 도로의 재비산먼지관련 성분간에 양호하였고, 폐기물소각이나 연료연소관련 성분간에도 양호하였다.
Dust samples have been collected from streets, schools, subway stations and households in Daegu metropolitan city. Samples were sieved through a 100 ${mu}m$ 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 influenced by natural sources while Cd, Cr, Cu, Ni, Pb and Zn were influenced by anthropogenic sources. The measured values were remarkably higher in components from natural sources than in components from anthropogenic sources. In particular, school dust had higher levels of Ca and Pb and subway station dust had higher levels of Cu and Zn. The percentage composition of chemicals from subway stations, households, and schools were remarkably higher in components from anthropogenic sources than that from streets. It is well recognized that anthropogenic sources were affected by indoor dust. Results of pollution index of hazardous heavy metals indicated that schools, households, and subway stations were more contaminated than streets and urban areas typically had higher pollution index than rural areas. The correlation analysis among trace elements seem to suggest that there were correlations between components of soil/road dust resuspension, and components of waste incineration and fuel combustion.
