TY - JOUR
T1 - Contrasting the size-resolved nature of particulate arsenic, cadmium, and lead among diverse regions
AU - Gonzalez, Marisa E.
AU - Stahl, Connor
AU - Cruz, Melliza Templonuevo
AU - Bañaga, Paola Angela
AU - Betito, Grace
AU - Braun, Rachel A.
AU - Azadi Aghdam, Mojtaba
AU - Cambaliza, Maria Obiminda
AU - Lorenzo, Genevieve Rose
AU - MacDonald, Alexander B.
AU - Simpas, James Bernard
AU - Csavina, Janae
AU - Sáez, A. Eduardo
AU - Betterton, Eric
AU - Sorooshian, Armin
N1 - Publisher Copyright:
© 2021 Turkish National Committee for Air Pollution Research and Control
PY - 2021/3
Y1 - 2021/3
N2 - This study examines the mass size distributions and crustal enrichment factors (EFs) of arsenic (As), cadmium (Cd), and lead (Pb) for diverse regions: coastal marine (Marina, California), arid mining facility (Hayden, Arizona), arid urban (Tucson, Arizona), free troposphere (Mt. Lemmon, Arizona), and coastal urban (Manila, Philippines). Micro-orifice uniform deposit impactor (MOUDI) measurements revealed several notable features. All sites showed a bimodal profile with a peak in the submicrometer and supermicrometer diameter range except for Manila, which peculiarly lacked a peak above 1 μm. Enrichment factor analysis revealed contaminated dust at all sites, even the free tropospheric site, with greater contamination in the submicrometer range. The most extensive dataset in Manila allowed for seasonal analysis, which revealed differences among the same species based on seasonally-dependent transport patterns. Sites experiencing biomass burning influence (Manila and Marina) generally exhibited suppressed concentrations and crustal EFs during burning periods presumably because soil emitted from fires is fresh without extensive processing time to become contaminated. These results have important implications for a variety of aerosol effects dependent on aerosol size (e.g., public health, biogeochemical cycling, heterogeneous chemistry) and underscore the importance of accounting for the coarse aerosol mode as more dust emissions are expected in warmer climate scenarios.
AB - This study examines the mass size distributions and crustal enrichment factors (EFs) of arsenic (As), cadmium (Cd), and lead (Pb) for diverse regions: coastal marine (Marina, California), arid mining facility (Hayden, Arizona), arid urban (Tucson, Arizona), free troposphere (Mt. Lemmon, Arizona), and coastal urban (Manila, Philippines). Micro-orifice uniform deposit impactor (MOUDI) measurements revealed several notable features. All sites showed a bimodal profile with a peak in the submicrometer and supermicrometer diameter range except for Manila, which peculiarly lacked a peak above 1 μm. Enrichment factor analysis revealed contaminated dust at all sites, even the free tropospheric site, with greater contamination in the submicrometer range. The most extensive dataset in Manila allowed for seasonal analysis, which revealed differences among the same species based on seasonally-dependent transport patterns. Sites experiencing biomass burning influence (Manila and Marina) generally exhibited suppressed concentrations and crustal EFs during burning periods presumably because soil emitted from fires is fresh without extensive processing time to become contaminated. These results have important implications for a variety of aerosol effects dependent on aerosol size (e.g., public health, biogeochemical cycling, heterogeneous chemistry) and underscore the importance of accounting for the coarse aerosol mode as more dust emissions are expected in warmer climate scenarios.
KW - Aerosol
KW - CAMPEx
KW - Lead
KW - Particulate matter
KW - Size distribution
KW - Toxicity
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U2 - 10.1016/j.apr.2021.01.002
DO - 10.1016/j.apr.2021.01.002
M3 - Article
AN - SCOPUS:85099187378
SN - 1309-1042
VL - 12
SP - 352
EP - 361
JO - Atmospheric Pollution Research
JF - Atmospheric Pollution Research
IS - 3
ER -