Daily trends and source apportionment of ultrafine particulate mass (PM0.1) over an annual cycle in a typical California city.
作者： Toshihiro Kuwayama , Chris R. Ruehl , Michael J. Kleeman
DOI: 10.1021/ES403235C
关键词:
摘要: Toxicology studies indicate that inhalation of ultrafine particles (Dp < 0.1 μm) causes adverse health effects, presumably due to their large surface area-to-volume ratio can drive heterogeneous reactions. Epidemiological associations between and however, have been difficult identify the lack appropriate long-term monitoring exposure data. The majority existing particle epidemiology are based on number, although an independent analysis suggests mass (PM0.1) correlates better with area. More information is needed characterize PM0.1 fully evaluate effects using epidemiology. present study summarizes 1 year daily chemistry source apportionment at Sacramento, CA, USA. Positive matrix factorization (PMF) was used resolve contributions from old-technology diesel engines, residential wood ...
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