Concentration and composition variations of metals in the outdoor PM10 of elementary schools during river dust episodes.
作者： Chung-Yih Kuo , Hao-Jan Yang , Yi-Chen Chiang , Dian-Jheng Lai , Ying-Hsuan Shen
DOI: 10.1007/S11356-014-3179-Y
关键词: Ecotoxicology 、 Soil test 、 Environmental science 、 Composition (visual arts) 、 Environmental chemistry 、 Air quality index 、 Hydrology 、 Aeolian processes
摘要: Aeolian river dust can seriously affect the air quality in central Taiwan. The main purpose of this study was to assess concentration variations PM10 and metals at different elementary schools during episodes. River samples were taken from eight sites bare soil areas Choshui River. aerosols four Yulin County collected by means high-volume samplers. Fifteen elements (Fe, Al, Ca, Mg, Mn, Zn, Ti, Ni, V, Cr, As, Pb, Cu, Co, Cd) analyzed study. coefficients divergence (CDs) obtained comparing metal compositions on sampling days with mean contents as reference. CD values showed that high-exposure episodes similar those dust. concentrations much higher than non-river-dust This also indicated sites, both low-exposure control not only episodes, but after toxic (Ni, about 11.3 times (189 ng/m3) (16.7 8.9 same periods site (21.3 ng/m3).
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