Publications by authors named "Erickson Santos"
Article Synopsis
- Smoke from forest fires poses significant health risks globally, particularly affecting regions like the Amazon basin, where agricultural practices contribute to air quality issues.
- Public health authorities struggle to predict and manage the effects of smoke, making it challenging to protect communities like Manaus from cardiorespiratory illnesses linked to fire smoke.
- A study found a one-day lag between fire events and increased hospital admissions for respiratory problems, suggesting that an early warning system could help mitigate health impacts in affected areas.
Article Synopsis
- Extreme droughts have hit the Amazon every 5 years in the 21st century, peaking in 2015, leading to increased biomass burning (BB) that negatively impacted air quality.
- The study focused on air quality in Manaus, Brazil, during wet and dry seasons of 2015 and 2016, coinciding with a strong El Niño event that intensified BB occurrences.
- Analysis showed a significant rise in particulate matter, with carbon monoxide levels increasing by 15% and levoglucosan by 500% due to heightened BB during the El Niño, suggesting future air quality degradation if droughts and BB continue.
Limited studies have reported on in-vitro analysis of PM but as far as the authors are aware, bioaccessibility of PM in artificial lysosomal fluid (ALF) has not been linked to urban development models before. The Brazilian cities Manaus (Amazon) and Curitiba (South region) have different geographical locations, climates, and urban development strategies. Manaus drives its industrialization using the free trade zone policy and Curitiba adopted a services centered economy driven by sustainability.
View Article and Find Full Text PDFAcid-driven multiphase chemistry of isoprene epoxydiols (IEPOX), key isoprene oxidation products, with inorganic sulfate aerosol yields substantial amounts of secondary organic aerosol (SOA) through the formation of organosulfur compounds. The extent and implications of inorganic-to-organic sulfate conversion, however, are unknown. In this article, we demonstrate that extensive consumption of inorganic sulfate occurs, which increases with the IEPOX-to-inorganic sulfate concentration ratio (IEPOX/Sulf), as determined by laboratory measurements.
View Article and Find Full Text PDFAcid-catalyzed multiphase chemistry of isoprene epoxydiols (IEPOX) on sulfate aerosol produces substantial amounts of water-soluble secondary organic aerosol (SOA) constituents, including 2-methyltetrols, methyltetrol sulfates, and oligomers thereof in atmospheric fine particulate matter (PM2.5). These constituents have commonly been measured by gas chromatography interfaced to electron ionization mass spectrometry (GC/EI-MS) with prior derivatization or by reverse-phase liquid chromatography interfaced to electrospray ionization high-resolution mass spectrometry (RPLC/ESI-HR-MS).
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