Publication Abstracts
Plaas et al. 2023
, J. Yan, C. Christensen, S. Chang, C. Cortez, S. Fern, L. Nelson, A. Sabo, N.C. Armstrong, B.J. Turpin, Y. Zhang, H.W. Paerl, and J.D. Surratt, 2023: Secondary organic aerosol formation from cyanobacterial-derived volatile organic compounds. ACS Earth Space Chem., 7, no. 9, 1798-1813, doi:10.1021/acsearthspacechem.3c00177.
Recent work has demonstrated the primary aerosolization of cyanobacterial cells, toxins, and metabolites from cyanobacterial harmful algal blooms (CHABs). However, another possible source of CHAB-derived aerosols is secondary organic aerosol (SOA) formation via the atmospheric oxidation of volatile organic compounds (VOCs) emitted by CHABs. To examine potential SOA formation from CHABs, two cyanobacterial VOCs — 2-methylisoborneol (2-MIB) and geosmin (GSM) — were oxidized via hydroxyl radicals (*OH) in a potential aerosol mass-oxidation flow reactor. At 100 ppbv, SOA mass yields were 15.1±2% and 33.9±1.3%, from 2-MIB and GSM, respectively. SOA mass concentrations generated from 2-MIB and GSM oxidations reached up to 102±22 µg/m3 and 252±52 µg/m3, respectively, when exposed to 8-16 days of equivalent *OH exposure. Offline molecular-level characterization of Teflon-filter collected SOA by reverse-phase liquid chromatography interfaced to high-resolution quadrupole time-of-flight mass spectrometry equipped with electrospray ionization (RPLC/ESI-HR-QTOFMS) revealed 7 distinct chemical compounds in both 2-MIB and GSM-derived SOA, which we propose for use as molecular tracers of CHAB-derived SOA in ambient fine particulate matter (PM2.5). Two 2-MIB-derived SOA tracers (molecular formulas of C10H18O4 and C10H16O5) were measured in PM2.5 collected from the airshed of a CHAB. To the best of our knowledge, this is the first observation of respirable CHAB-derived SOA. Our findings strengthen the need to consider outcomes related to human respiratory health in risk assessments and public health messaging surrounding residential and recreational exposures to CHABs.
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BibTeX Citation
@article{pl03000d,
author={Plaas, H. E. and Yan, J. and Christensen, C. and Chang, S. and Cortez, C. and Fern, S. and Nelson, L. and Sabo, A. and Armstrong, N. C. and Turpin, B. J. and Zhang, Y. and Paerl, H. W. and Surratt, J. D.},
title={Secondary organic aerosol formation from cyanobacterial-derived volatile organic compounds},
year={2023},
journal={ACS Earth and Space Chemistry},
volume={7},
number={9},
pages={1798--1813},
doi={10.1021/acsearthspacechem.3c00177},
}
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RIS Citation
TY - JOUR ID - pl03000d AU - Plaas, H. E. AU - Yan, J. AU - Christensen, C. AU - Chang, S. AU - Cortez, C. AU - Fern, S. AU - Nelson, L. AU - Sabo, A. AU - Armstrong, N. C. AU - Turpin, B. J. AU - Zhang, Y. AU - Paerl, H. W. AU - Surratt, J. D. PY - 2023 TI - Secondary organic aerosol formation from cyanobacterial-derived volatile organic compounds JA - ACS Earth Space Chem. JO - ACS Earth and Space Chemistry VL - 7 IS - 9 SP - 1798 EP - 1813 DO - 10.1021/acsearthspacechem.3c00177 ER -
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