Partitioning of trace elements and metals between quasi-ultrafine, accumulation and coarse aerosols in indoor and outdoor air in schools
Partitioning of trace elements and metals between quasi-ultrafine, accumulation and coarse aerosols in indoor and outdoor air in schools
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DOI：
10.1016/j.atmosenv.2014.07.027
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发表时间：
2015-04
影响因子：
5
通讯作者：
M. Viana;I. Rivas;X. Querol;A. Alastuey;M. Álvarez-Pedrerol;L. Bouso;C. Sioutas;J. Sunyer
中科院分区：
文献类型：
--
作者：
M. Viana;I. Rivas;X. Querol;A. Alastuey;M. Álvarez-Pedrerol;L. Bouso;C. Sioutas;J. Sunyer
在巴塞罗那（西班牙）的39所小学的室内和室外空气中，分析了三种尺寸级（<0.25 mm，准超细颗粒，q-UF; 0.25e2.5 mm，累积颗粒; 2.5e10 mm，粗颗粒）的微量元素和金属的粒度分布模式。特别注意每种颗粒大小范围内的排放源。结果证明，在q-UF颗粒中存在高比例的元素，通常在粗PM中发现（Ca，Al，Fe，Mn或Na），以及几种潜在的健康危害金属（Mn，Cu，Sn，V，Pb）。模态转换（例如，从累积到粗颗粒或q-UF颗粒），当颗粒物渗入室内时，主要是二次无机气溶胶。我们的研究结果表明，在交通繁忙的地区的学校的位置增加了q-UF颗粒，渗透室内相当有效的丰度，从而可能会影响儿童暴露于这些健康危害颗粒。
Particle size distribution patterns of trace elements and metals across three size fractions (<0.25 mm, quasi-ultrafine particles, q-UF; 0.25e2.5 mm, accumulation particles; 2.5e10 mm, coarse particles) were analysed in indoor and outdoor air at 39 primary schools across Barcelona (Spain). Special attention was paid to emission sources in each particle size range. Results evidenced the presence in q-UF particles of high proportions of elements typically found in coarse PM (Ca, Al, Fe, Mn or Na), as well as several potentially health-hazardous metals (Mn, Cu, Sn, V, Pb). Modal shifts (e.g., from accumulation to coarse or q-UF particles) were detected when particles infiltrated indoors, mainly for secondary inorganic aerosols. Our results indicate that the location of schools in heavily trafficked areas increases the abundance of q-UF particles, which infiltrate indoors quite effectively, and thus may impact children exposure to these health-hazardous particles.