کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4429445 1619824 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterisation of nano- and micron-sized airborne and collected subway particles, a multi-analytical approach
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Characterisation of nano- and micron-sized airborne and collected subway particles, a multi-analytical approach
چکیده انگلیسی

Continuous daily measurements of airborne particles were conducted during specific periods at an underground platform within the subway system of the city center of Stockholm, Sweden. Main emphasis was placed on number concentration, particle size distribution, soot content (analyzed as elemental and black carbon) and surface area concentration. Conventional measurements of mass concentrations were conducted in parallel as well as analysis of particle morphology, bulk- and surface composition. In addition, the presence of volatile and semi volatile organic compounds within freshly collected particle fractions of PM10 and PM2.5 were investigated and grouped according to functional groups. Similar periodic measurements were conducted at street level for comparison.The investigation clearly demonstrates a large dominance in number concentration of airborne nano-sized particles compared to coarse particles in the subway. Out of a mean particle number concentration of 12 000 particles/cm3 (7500 to 20 000 particles/cm3), only 190 particles/cm3 were larger than 250 nm. Soot particles from diesel exhaust, and metal-containing particles, primarily iron, were observed in the subway aerosol. Unique measurements on freshly collected subway particle size fractions of PM10 and PM2.5 identified several volatile and semi-volatile organic compounds, the presence of carcinogenic aromatic compounds and traces of flame retardants.This interdisciplinary and multi-analytical investigation aims to provide an improved understanding of reported adverse health effects induced by subway aerosols.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 427–428, 15 June 2012, Pages 390–400
نویسندگان
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