Unexpected Performance Improvements of Nitrogen Dioxide and Ozone Sensors by Including Carbon Monoxide Sensor Signal

Hasan, Md. Hasibul; Yu, Haofei; Ivey, Cesunica E.; Pillarisetti, Ajay; Yuan, Ziyang; Do, Khanh; Li, Yi

doi:10.1021/acsomega.2c07734

Cited by 9 publications

(5 citation statements)

References 56 publications

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“…Sensor performance is validated by contrasting its measurements to that obtained by a reference instrument or by performing calibration. [44][45][46] 3. Methods for the preparation of ozone sensing materials Ozone sensors possessing stability, agile response, good recovery, and broad sensing limits are fabricated using light radiation in lithography and laser ablation techniques.…”

Section: Designing Reliable Ozone Sensorsmentioning

confidence: 99%

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Recent trends in ozone sensing technology

Iqbal,

Muhammad,

Hussain

et al. 2023

Anal. Methods

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Section: Designing Reliable Ozone Sensorsmentioning

confidence: 99%

“…Sensor performance is validated by contrasting its measurements to that obtained by a reference instrument or by performing calibration. 44–46…”

Section: Designing Reliable Ozone Sensorsmentioning

confidence: 99%

Recent trends in ozone sensing technology

Iqbal,

Muhammad,

Hussain

et al. 2023

Anal. Methods

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“…Low-cost air quality sensors (LCSs) are an especially important area for future growth around Arizona to gain broader spatial coverage of ozone and its precursors. Attempts at such efforts have been underway such as the use of low-cost NO 2 , CO, and ozone sensors in Maricopa County. , It will be beneficial to expand monitoring, especially in areas of high impact and sensitivity, with such areas identifiable using online knowledge banks (e.g., ephtracking.cdc.gov) that are especially well-suited for research related to environmental justice.…”

Section: Steps Forwardmentioning

confidence: 99%

Ozone in the Desert Southwest of the United States: A Synthesis of Past Work and Steps Ahead

Sorooshian,

Arellano,

Fraser

et al. 2024

ACS EST Air

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A region often neglected in the grander scale of general atmospheric chemistry studies and model evaluation for gasphase chemistry is the desert southwest of the U.S. Despite regulatory progress, challenges in meeting the National Ambient Air Quality Standard for ozone motivate a re-examination of the unique meteorological conditions, interactions between the desert, agricultural, and built environmental landscapes, emissions across natural and anthropogenic sources, and regional transport of precursors that govern ozone formation in the desert Southwest. Arizona includes multiple nonattainment counties with a unique situation in terms of its environment (e.g., vegetation, meteorology, fire prone areas), complex terrain, urban growth, transport vulnerability, and limited knowledge base. Here we summarize past works investigating the ozone over Arizona, including 61 peerreviewed publications found since the first one in 1996, and determine significant knowledge gaps to guide future research with the aim of improving regulatory policy. A more in-depth focus is placed here on Maricopa County, which includes the Phoenix Metropolitan area, where significant population growth in recent decades coupled with the extreme high temperatures and surrounding complex terrain creates a poorly understood airshed in terms of ozone chemistry, thereby complicating regulatory decisions. We suggest paths forward, including improved monitoring, assessment, and modeling tools for the region, better leveraging of archived data, and engagement with the public, government, and policy. This Review is highly relevant as well to other semiarid and arid regions, which represent the most common land type globally, warranting more attention.

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“…Higher relative humidity and lower temperatures during winter promote aerosol formation through heterogenous chemistry and condensation. 43,44 It is well-known that relative humidity may influence low-cost sensor readings [45][46][47] , and therefore the reference-based adjustments were carried out for personal measurements, improving overall correlations of hourly averages. As such, the personal exposure results presented in this study are precise across all wearable sensors.…”

Section: Microenvironmental Analysis and Uncertaintiesmentioning

confidence: 99%

Indoor and Ambient Influences on PM2.5 Exposure and Well-being for a Rail Impacted Community and Implications for Personal Protections

Torres,

Do,

Delgado

et al. 2023

Preprint

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Background. Higher air pollution emissions can be observed near rail networks, local and highway automobile corridors, and shipyards. Communities near such sources are often disproportionately exposed to emissions from these stationary and mobile sources. One such community is West San Bernardino in California, where households are feet away from the Burlington Northern Santa Fe intermodal facility and are impacted by activities that are estimated to continuously emit air pollutants due to 24/7 operation.Objective. This study aimed to (1) quantify the impact of personal mobility and housing characteristics on daily PM2.5 exposures and well-being for West San Bernardino community members, and (2) develop individualized resilience plans for community collaborators to support future PM2.5 exposure reduction. Methods.Personal PM2.5 exposures were measured for each community collaborator for seven consecutive days during three deployment periods: October 2021, January 2022, and March 2022. Indoor and ambient PM2.5 levels were also continuously measured for five households over six months using PurpleAir Classic monitors. Demographic and well-being data were collected upon recruitment and after each week of engagement, respectively. Results.Personal exposures in home microenvironments were highest near the railyard and decreased with distance from the railyard. Home exposures were 40% higher on average compared to non-home microenvironments. Household PM2.5 levels had a higher-than-expected average infiltration factor of 0.70, and indoor 98th percentiles across the households far exceeded a healthy level at an average of 61 μg/m3. Increasing median personal exposures were linearly correlated with worsening health conditions.Significance.Results suggest that surrounding land use, household building characteristics, and indoor activity all compound to worsen air pollution exposures beyond what is expected for exposures in non-industrialized areas. Findings prompt a call for stronger regulation, not only for emissions, but also for indoor air quality and zoning standards that specifically protect disproportionately impacted communities.

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Unexpected Performance Improvements of Nitrogen Dioxide and Ozone Sensors by Including Carbon Monoxide Sensor Signal

Cited by 9 publications

References 56 publications

Recent trends in ozone sensing technology

Recent trends in ozone sensing technology

Ozone in the Desert Southwest of the United States: A Synthesis of Past Work and Steps Ahead

Indoor and Ambient Influences on PM2.5 Exposure and Well-being for a Rail Impacted Community and Implications for Personal Protections

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