scholarly journals Effectiveness of Residential Wood-Burning Regulation on Decreasing Particulate Matter Levels and Hospitalizations in the San Joaquin Valley Air Basin

2015 ◽  
Vol 105 (4) ◽  
pp. 772-778 ◽  
Author(s):  
Poh-Sin Yap ◽  
Cynthia Garcia
Keyword(s):  
Particulate Matter ◽  
San Joaquin Valley ◽  
Wood Burning

Cardiopulmonary Toxicity Of Urban Source-Oriented Particulate Matter From California’s San Joaquin Valley

2012 ◽  
Author(s):  
Laurel E. Plummer ◽  
Christopher M. Carosino ◽  
Keith J. Bein ◽  
Anthony S. Wexler ◽  
Kent E. Pinkerton
Keyword(s):  
Particulate Matter ◽  
San Joaquin Valley

Organic functional group composition of particulate matter from fresh and aged wood burning and coal combustion

2020 ◽  
Author(s):  
Amir Yazdani ◽  
Nikunj Dudani ◽  
Satoshi Takahama ◽  
Amelie Bertrand ◽  
André S. H. Prévôt ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Particulate Matter ◽  
Infrared Spectra ◽  
Atmospheric Aerosols ◽  
Coal Combustion ◽  
Organic Aerosol ◽  
High Abundance ◽  
Mid Infrared ◽  
Aerosol Mass ◽  
Wood Burning

<p>Particulate matter (PM) affects visibility and climate through light scattering, direct and indirect radiative forcing, and affecting cloud formation [1]. In addition, exposure to ambient fine PM is estimated to have caused 8.9 million deaths worldwide in 2015 [2]. Organic matter (OM), can make up more than half of total fine atmospheric PM, and yet its composition, formation mechanisms, and adverse health effects are not fully characterized due to its sheer compositional complexity. Biomass burning (e.g., residential wood burning, wildfires, and prescribed burning) and coal combustion (for heat and power generation) are two major OM sources, for which the impact of atmospheric aging - including secondary organic aerosol (SOA) formation - is not yet fully clear [3].</p><p>In this study, we investigated the effect of aging on composition and mass concentration of organic aerosols of wood burning (WB) and coal combustion (CC) emissions using two complementary methods, i.e., mid-infrared spectroscopy and aerosol mass spectrometry (AMS). For this purpose, primary aerosols were injected into the Paul Scherrer Institute (PSI) environmental chamber and aged using hydroxyl and nitrate radicals to simulate day-time and night-time oxidation processes in the atmosphere. In these experiments, aerosols reached an oxidative age comparable to that of atmospheric aerosols. A time-of-flight AMS instrument was used to measure the high-time-resolution composition of non-refractory fine PM, while we collected PM<sub>1 </sub>aerosols on PTFE filters before and after four hours of aging for off-line Fourier transform-infrared spectroscopy (FT-IR) measurements.</p><p>AMS and FT-IR estimates of organic aerosol mass concentration were highly correlated (r<sup>2</sup>=0.92); both indicating an approximately three-fold increase in organic aerosol concentration after aging. The OM/OC ratio, indicating the extent of oxidation also agreed closely between the two instruments and increased, on average, from 1.6 (before aging) to 2 (after aging). Mid-infrared spectroscopy, which is able to differentiate among oxygenated species, shows a distinct functional group composition for aged WB aerosols (high abundance of carboxylic acids) and CC aerosols (high abundance of non-acid carbonyls) and detects considerable amounts polycyclic aromatic hydrocarbons (PAHs) for both sources. Mid-infrared spectra of fresh WB and CC aerosols are reminiscent of their parent compounds with differences in specific functional groups suggesting the dominant oxidation pathways for each emission source. Finally, the comparison of mid-infrared spectra of aged WB aerosols in the environmental chamber with that of ambient samples affected by residential wood burning and wildfires reveals interesting similarities regarding the high abundance of alcohols and visible signatures of lignin. This finding is useful for interpreting sources of atmospheric aerosols and better interpretation of their complex mid-infrared spectra.</p><p>--------------------------</p><p>REFERENCES</p><p>[1] M. Hallquist et al., “The formation, properties and impact of secondary organic aerosol: current and emerging issues,” Atmos Chem Phys, 2009.</p><p>[2] R. Burnett et al., “Global estimates of mortality associated with long-term exposure to outdoor fine particulate matter,” Proc. Natl. Acad. Sci., 2018.</p><p>[3] A. Bertrand et al., “Primary emissions and secondary aerosol production potential from woodstoves for residential heating: Influence of the stove technology and combustion efficiency,” Atmos. Environ., 2017.</p>

scholarly journals Transport and Dispersion during Wintertime Particulate Matter Episodes in the San Joaquin Valley, California

2006 ◽  
Vol 56 (7) ◽  
pp. 961-976 ◽  
Author(s):  
Clinton P. MacDonald ◽  
Michael C. McCarthy ◽  
Timothy S. Dye ◽  
Neil J.M. Wheeler ◽  
Hilary R. Hafner ◽  
...  
Keyword(s):  
Particulate Matter ◽  
San Joaquin Valley

scholarly journals Understanding Public Views about Air Quality and Air Pollution Sources in the San Joaquin Valley, California

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Ricardo Cisneros ◽  
Paul Brown ◽  
Linda Cameron ◽  
Erin Gaab ◽  
Mariaelena Gonzalez ◽  
...  
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Air Quality ◽  
Public Perceptions ◽  
Pollution Sources ◽  
San Joaquin Valley ◽  
Public Views

The San Joaquin Valley of California has poor air quality and high rates of asthma. Surveys were collected from 744 residents of the San Joaquin Valley from November 2014 to January 2015 to examine the public’s views about air quality. The results of this study suggest that participants exposed to high PM2.5 (particulate matter less than 2.5 microns in size) concentrations perceived air pollution to be of the worst quality. Air quality in the San Joaquin Valley was primarily perceived as either moderate or unhealthy for sensitive groups. Females perceived air pollution to be of worse quality compared to males. Participants perceived unemployment, crime, and obesity to be the top three most serious community problems in the San Joaquin Valley. Participants viewed cars and trucks, windblown dust, and factories as the principle contributors to air pollution in the area. There is a need to continue studying public perceptions of air quality in the San Joaquin Valley with a more robust survey with more participants over several years and seasons.

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