ACS ES&T Air最新文献

{"title":"Atmospheric Oxidation of PFAS by Hydroxyl Radical: A Density Functional Theory Study","authors":"Michael R. Dooley,&nbsp;Steven P. Nixon,&nbsp;Benjamin E. Payton,&nbsp;Mikayla A. Hudak,&nbsp;Fiona Odei and Shubham Vyas*,&nbsp;","doi":"10.1021/acsestair.4c0007010.1021/acsestair.4c00070","DOIUrl":"https://doi.org/10.1021/acsestair.4c00070https://doi.org/10.1021/acsestair.4c00070","url":null,"abstract":"<p >Per- and polyfluoroalkyl substances (PFAS) are persistent, widely spread, and harmful pollutants. They can travel through the air, be transformed by radicals, and deposit into water or onto surfaces. They enter the atmosphere via direct emission, degradation of precursors, or aerosol formation. A recent investigation found novel compounds in rainwater, meaning PFAS may undergo transformations in the atmosphere. These transformations might exhibit distinct behavior compared to more well-researched reactions, creating difficulties in the identification of any new compounds being produced. Using density functional theory (DFT), we simulated reactions of PFAS with a major atmospheric radical, the hydroxyl radical, revealing activation energies and other thermodynamic insights. The activation energies aid in predicting likely reactions and understanding speciation. Identifying new species can guide future analyses and remediation efforts. We focused on the nine most widely studied families of PFAS, finding that radical abstraction along the alkyl chain is favored over functional groups regardless of chain length. These results establish a new foundation for understanding PFAS transformations in the atmosphere, especially when decarboxylation is not followed.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1352–1361 1352–1361"},"PeriodicalIF":0.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complexities of Photosensitization in Atmospheric Particles","authors":"Zhancong Liang,&nbsp;Yongjie Li,&nbsp;Brix Raphael Go and Chak K. Chan*,&nbsp;","doi":"10.1021/acsestair.4c0011210.1021/acsestair.4c00112","DOIUrl":"https://doi.org/10.1021/acsestair.4c00112https://doi.org/10.1021/acsestair.4c00112","url":null,"abstract":"<p >Brown carbons (BrCs) play a pivotal role in the light absorption by aerosol particulates by exerting a positive radiative forcing effect that contributes to global warming. Beyond impacts on radiative balance, some BrCs, as photosensitizers, can generate reactive triplet-state molecules toward various atmospheric molecules upon photoexcitation. The significance of photosensitization has been increasingly recognized, particularly in the context of escalated global wildfire incidents that emit substantial BrCs. We focus on the complex atmospheric photosensitization by discussing the current challenges, including (1) the diverse reactivities of the photosensitizer mixture in atmospheric particles, (2) the methodologies for investigating photosensitization processes, (3) the driving factors of photosensitization, and (4) the typical pathways and mechanisms of atmospheric photosensitized reactions. Lastly, we advise future research to focus on the refined parametrization of triplet and singlet oxygen concentrations, alongside their complex reactivities.</p><p >Atmospheric photosensitization, especially in light-absorbing particles, can drive secondary pollutant formation under light. This work comprehensively discusses the existing findings, remaining challenges, and future directions in this emerging research field.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1333–1351 1333–1351"},"PeriodicalIF":0.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestair.4c00112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ozone Uptake Kinetics and Implications for the Extent of Modification of Airborne Pollen","authors":"Sarah J. C. Simon,&nbsp; and ,&nbsp;Jennifer G. Murphy*,&nbsp;","doi":"10.1021/acsestair.4c0012410.1021/acsestair.4c00124","DOIUrl":"https://doi.org/10.1021/acsestair.4c00124https://doi.org/10.1021/acsestair.4c00124","url":null,"abstract":"<p >Ground-level ozone, a highly reactive air pollutant, is known to cause significant damage to biological surfaces. Understanding the interaction between ozone and pollen is crucial, as it may influence pollen allergenicity and reproductive viability. Measurements were conducted to determine the kinetics and extent of ozone uptake for 12 different types of tree pollen (Birch, Sycamore Maple, Box Elder Maple, Alder Gray, Cypress, Ash, Mulberry, Juniper, White Pine, Lombardy Poplar, Red Oak, and Black Oak). The results revealed an initial rapid uptake of ozone, followed by a gradual decline due to the saturation of surface reaction sites and the depletion of reactive substances. The geometric initial uptake coefficients (γ₀-geo) ranged from 0.4 to 6.4 ×  10^–5, and surface saturation was reached under our experimental conditions on a time scale of 1500–10,000 s. Using the integrated uptake of ozone over the observation period, we calculated surface site concentrations of 10¹⁴–10¹⁶ sites cm^–2. Most experiments were performed under dry conditions, but tests with Birch at intermediate relative humidities, up to 60%, showed that the presence of water may decrease the uptake coefficient by a factor of 2. When Ash, Birch and Black Oak pollen grains were manually crushed to mimic subpollen particles, they were found to take up orders of magnitude more ozone for the same mass of pollen. For pollen grains washed in acetone to extract soluble molecules from the pollen coat, the cumulative ozone uptake for some pollen types was significantly reduced. This reduction was interpreted to arise as a loss of reactive surface sites and lipids with C═C bonds, which are crucial for ozone interactions. The presence of highly antioxidant molecules, like carotenoids in Ash, was confirmed spectroscopically, and linked to the extremely high cumulative uptake of ozone, suggesting a protective role for the pollen coat. A box model representing diurnally varying emissions, ozone oxidation and deposition was used to estimate the typical extent of oxidation of airborne pollen. The model indicated that surface oxidation peaked in the afternoon and evening concurrent with high ozone levels, and the percent oxidation ranged from 24% to 97% depending on the pollen species. Sensitivity analysis suggested that conclusively determining whether pollen grains are fully oxidized or unoxidized in the atmosphere is challenging. Instead, the extent of oxidation falls within a range that warrants further investigation into its impact on pollen and human exposure.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1413–1429 1413–1429"},"PeriodicalIF":0.0,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Secondary Organic Aerosol Formation during the Oxidation of Large Aromatic and Other Cyclic Anthropogenic Volatile Organic Compounds","authors":"Damianos Pavlidis,&nbsp;Petro Uruci,&nbsp;Kalliopi Florou,&nbsp;Andrea Simonati,&nbsp;Christina Ν. Vasilakopoulou,&nbsp;Georgia Argyropoulou and Spyros N. Pandis*,&nbsp;","doi":"10.1021/acsestair.4c0017610.1021/acsestair.4c00176","DOIUrl":"https://doi.org/10.1021/acsestair.4c00176https://doi.org/10.1021/acsestair.4c00176","url":null,"abstract":"<p >The secondary organic aerosol (SOA) production from the reactions of anthropogenic large volatile (VOCs) and intermediate volatility organic compounds (IVOCs) with hydroxyl radicals under high NO_<i>x</i> conditions was investigated. The organic compounds studied include cyclic alkanes of increasing size (amylcyclohexane, hexylcyclohexane, nonylcyclohexane, and decylcyclohexane) and aromatic compounds (1,3,5-trimethylbenzene, 1,3,5-triethylbenzene and 1,3,5-tri<i>tert</i>-butylbenzene). A considerable amount of SOA was formed from all examined compounds. For the studied cyclohexanes (C₁₁–C₁₆) there appears that the SOA yield depends nonlinearly on the length of their substitute chain. The large cyclohexanes had higher yields than the aromatic compounds, but the aromatic precursors produced a more oxidized SOA. This was due to the production of lower volatility and O:C first generation products by the cyclohexanes. Most oxidation products (with <i>C</i>* &lt; 10⁴ μg m^–3) in the case of cyclohexanes are SVOCs (∼50%), while of aromatics are IVOCs (∼60%). Structure, molecular size, and length of the substitute chain of the parent hydrocarbon were found to play key roles in SOA formation, oxidation state, and volatility. The SOA volatility distribution, effective vaporization enthalpy, and effective accommodation coefficient were also quantified by combining SOA yields, thermodenuder (TD) and isothermal dilution measurements. Parameterizations for the Volatility Basis Set (VBS) are proposed for future use in chemical transport models.</p><p >SOA production from large anthropogenic aromatic and cyclic alkanes oxidized with hydroxyl radicals under high NO_<i>x</i> conditions is explored and parameterized for the Volatility Basis Set.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1442–1452 1442–1452"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestair.4c00176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Secondary Organic Aerosol Formation during the Oxidation of Large Aromatic and Other Cyclic Anthropogenic Volatile Organic Compounds.","authors":"Damianos Pavlidis, Petro Uruci, Kalliopi Florou, Andrea Simonati, Christina Ν Vasilakopoulou, Georgia Argyropoulou, Spyros N Pandis","doi":"10.1021/acsestair.4c00176","DOIUrl":"10.1021/acsestair.4c00176","url":null,"abstract":"<p><p>The secondary organic aerosol (SOA) production from the reactions of anthropogenic large volatile (VOCs) and intermediate volatility organic compounds (IVOCs) with hydroxyl radicals under high NO _<i>x</i> conditions was investigated. The organic compounds studied include cyclic alkanes of increasing size (amylcyclohexane, hexylcyclohexane, nonylcyclohexane, and decylcyclohexane) and aromatic compounds (1,3,5-trimethylbenzene, 1,3,5-triethylbenzene and 1,3,5-tri<i>tert</i>-butylbenzene). A considerable amount of SOA was formed from all examined compounds. For the studied cyclohexanes (C₁₁-C₁₆) there appears that the SOA yield depends nonlinearly on the length of their substitute chain. The large cyclohexanes had higher yields than the aromatic compounds, but the aromatic precursors produced a more oxidized SOA. This was due to the production of lower volatility and O:C first generation products by the cyclohexanes. Most oxidation products (with <i>C</i>* < 10⁴ μg m^-3) in the case of cyclohexanes are SVOCs (∼50%), while of aromatics are IVOCs (∼60%). Structure, molecular size, and length of the substitute chain of the parent hydrocarbon were found to play key roles in SOA formation, oxidation state, and volatility. The SOA volatility distribution, effective vaporization enthalpy, and effective accommodation coefficient were also quantified by combining SOA yields, thermodenuder (TD) and isothermal dilution measurements. Parameterizations for the Volatility Basis Set (VBS) are proposed for future use in chemical transport models.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1442-1452"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11555633/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Gaseous and Particulate Highly Oxygenated Organic Molecules from the Ozonolysis of Terpenes","authors":"Jian Zhao*,&nbsp;Valter Mickwitz,&nbsp;Jiangyi Zhang,&nbsp;Mitchell Alton,&nbsp;Manjula Canagaratna,&nbsp;Frans Graeffe,&nbsp;Siegfried Schobesberger,&nbsp;Douglas Worsnop and Mikael Ehn*,&nbsp;","doi":"10.1021/acsestair.4c0012110.1021/acsestair.4c00121","DOIUrl":"https://doi.org/10.1021/acsestair.4c00121https://doi.org/10.1021/acsestair.4c00121","url":null,"abstract":"<p >Terpenes are important constituents of volatile organic compounds (VOCs) emitted from both natural and anthropogenic sources, reacting rapidly in the atmosphere to form secondary organic aerosol (SOA), with climate and health implications. In this study, we explore the gas- and particle-phase mass spectra of highly oxygenated organic molecules (HOMs) from the ozonolysis of four monoterpenes (α-pinene, 3-carene, β-pinene, and limonene), a sesquiterpene, and a boreal forest-mimicking terpene mixture in chamber experiments. Measurements were performed by using the new vaporization inlet for aerosols (VIA) coupled to a nitrate-based chemical ionization mass spectrometer (NO₃-CIMS). We found that higher gas-phase HOM yields correlated with increased SOA formation, while detected particle-phase HOM mass fractions also depended on the terpene being oxidized. Elevated particle-phase dimer-to-monomer ratios compared to the gas phase were observed for α-pinene and β-pinene (by a factor of 4–8), which can not be solely explained by the volatility-dependent condensation, suggesting the existence of particle-phase processes. Additionally, a linear reconstruction of the terpene mixture mass spectra from the individual terpene spectra agreed much better for the particle phase than the gas phase, indicating particle-phase reactions forming common HOM species originating from different monoterpenes. Finally, the first ambient VIA–NO₃-CIMS measurements were conducted and showed similar trends for organics compared with aerosol mass spectrometer (AMS) measurements, while the sulfate tracked almost perfectly between the two instruments. However, the organic mass concentrations obtained by the VIA–NO₃-CIMS were lower than from the AMS, with our best estimates suggesting that particle-phase HOMs comprised about 17% of the organics in the ambient air, while in our chamber studies it was 14–29%.</p><p >Terpenes form SOA effectively, with climate and health impacts. This study investigates gas- and particle-phase HOMs in both laboratory and ambient experiments, revealing particle-phase processes of HOMs.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 10","pages":"1294–1303 1294–1303"},"PeriodicalIF":0.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestair.4c00121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142437312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid Nucleation and Growth of Indoor Atmospheric Nanocluster Aerosol during the Use of Scented Volatile Chemical Products in Residential Buildings","authors":"Satya S. Patra,&nbsp;Jianghui Liu,&nbsp;Jinglin Jiang,&nbsp;Xiaosu Ding,&nbsp;Chunxu Huang,&nbsp;Connor Keech,&nbsp;Gerhard Steiner,&nbsp;Philip S. Stevens,&nbsp;Nusrat Jung and Brandon E. Boor*,&nbsp;","doi":"10.1021/acsestair.4c0011810.1021/acsestair.4c00118","DOIUrl":"https://doi.org/10.1021/acsestair.4c00118https://doi.org/10.1021/acsestair.4c00118","url":null,"abstract":"<p >Scented volatile chemical products (sVCPs) are frequently used indoors. We conducted field measurements in a residential building to investigate new particle formation (NPF) from sVCP emissions. State-of-the-art instrumentation was used for real-time monitoring of indoor atmospheric nanocluster aerosol (NCA; 1–3 nm particles) size distributions and terpene mixing ratios. We integrated our NCA measurements with a comprehensive material balance model to analyze sVCP-nucleated indoor NCA dynamics. Our results reveal that sVCPs significantly increase indoor terpene mixing ratios (10–1,000 ppb), exceeding those in outdoor forested environments. The emitted terpenes react with indoor atmospheric O₃ and initiate indoor NPF, resulting in nucleation rates as high as ∼10⁵ cm^–3 s^–1 and condensational growth rates up to 300 nm h^–1; these are orders of magnitude higher than those reported during outdoor NPF events. Notably, high particle nucleation rates significantly increase indoor atmospheric NCA concentrations (10⁵–10⁸ cm^–3), and high growth rates drive their survival and growth to sizes that efficiently reach the deepest regions of the human respiratory system. We found sVCP-nucleated NCA to cause respiratory exposures and dose rates comparable to or exceeding those from primary aerosol sources such as gas stoves and diesel engines, highlighting their significant impact on indoor atmospheric environments.</p><p >This study investigates how everyday use of scented consumer products significantly elevates indoor atmospheric nanoparticle levels, underscoring the need to monitor them to protect the health and safety of building occupants.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 10","pages":"1276–1293 1276–1293"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestair.4c00118","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid Nucleation and Growth of Indoor Atmospheric Nanocluster Aerosol during the Use of Scented Volatile Chemical Products in Residential Buildings.","authors":"Satya S Patra, Jianghui Liu, Jinglin Jiang, Xiaosu Ding, Chunxu Huang, Connor Keech, Gerhard Steiner, Philip S Stevens, Nusrat Jung, Brandon E Boor","doi":"10.1021/acsestair.4c00118","DOIUrl":"https://doi.org/10.1021/acsestair.4c00118","url":null,"abstract":"<p><p>Scented volatile chemical products (sVCPs) are frequently used indoors. We conducted field measurements in a residential building to investigate new particle formation (NPF) from sVCP emissions. State-of-the-art instrumentation was used for real-time monitoring of indoor atmospheric nanocluster aerosol (NCA; 1-3 nm particles) size distributions and terpene mixing ratios. We integrated our NCA measurements with a comprehensive material balance model to analyze sVCP-nucleated indoor NCA dynamics. Our results reveal that sVCPs significantly increase indoor terpene mixing ratios (10-1,000 ppb), exceeding those in outdoor forested environments. The emitted terpenes react with indoor atmospheric O₃ and initiate indoor NPF, resulting in nucleation rates as high as ∼10⁵ cm^-3 s^-1 and condensational growth rates up to 300 nm h^-1; these are orders of magnitude higher than those reported during outdoor NPF events. Notably, high particle nucleation rates significantly increase indoor atmospheric NCA concentrations (10⁵-10⁸ cm^-3), and high growth rates drive their survival and growth to sizes that efficiently reach the deepest regions of the human respiratory system. We found sVCP-nucleated NCA to cause respiratory exposures and dose rates comparable to or exceeding those from primary aerosol sources such as gas stoves and diesel engines, highlighting their significant impact on indoor atmospheric environments.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 10","pages":"1276-1293"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474976/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142485103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecology of Airborne Microorganisms: Understanding the Impact of Haze and Sandstorms on Bacterial Community Structure and Pathogenicity","authors":"Jiahui Ma,&nbsp;Fangxia Shen*,&nbsp;Mengzhen Wang,&nbsp;Ye Sun,&nbsp;Chenji Li,&nbsp;Yinghan Teng,&nbsp;Quan Mu,&nbsp;Yu Chen,&nbsp;Yunhao Zheng,&nbsp;Yan Wu,&nbsp;Siyu Chen and Tianle Zhu,&nbsp;","doi":"10.1021/acsestair.4c0012210.1021/acsestair.4c00122","DOIUrl":"https://doi.org/10.1021/acsestair.4c00122https://doi.org/10.1021/acsestair.4c00122","url":null,"abstract":"<p >The adverse health effects of air pollutants are closely associated with their components, including bioaerosols. However, the characteristics of bioaerosols during pollution processes are not yet fully understood. Here, we investigated the 2- to 6-hly dynamics of bacterial aerosols over a short period that spanned one instance of haze and one sandstorm. 16S rRNA gene (rDNA) sequencing was used to identify the total bacteria, and 16S rRNA (rRNA) sequencing was applied to characterize the actively metabolizing bacteria. The results revealed the highest bacterial diversity in sandstorm air and the lowest bacterial diversity in haze air, with markedly different community structures. Moreover, substantial dissimilarity was detected between the communities of total bacteria and active bacteria within the sandstorm air, with less abundant bacteria dominating the active bacterial population. Selective pressure played a pivotal role in shaping the composition of active bacteria during sandstorms and the total bacterial community in hazy air, thereby enabling potential interactions between airborne microorganisms and chemical components. Additionally, functional prediction analysis suggested increased pathogenicity in the active bacteria of sandstorm air. These insights into the aggregated hourly dynamics and activity of bacterial aerosols during pollution processes underscore the importance of further research into the complex interactions between bioaerosols and air pollutants.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 11","pages":"1402–1412 1402–1412"},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Air Quality Sensor Experts Convene: Current Quality Assurance Considerations for Credible Data","authors":"Karoline K. Barkjohn*,&nbsp;Andrea Clements,&nbsp;Corey Mocka,&nbsp;Colin Barrette,&nbsp;Ashley Bittner,&nbsp;Wyatt Champion,&nbsp;Brett Gantt,&nbsp;Elizabeth Good,&nbsp;Amara Holder,&nbsp;Berkley Hillis,&nbsp;Matthew S. Landis,&nbsp;Menaka Kumar,&nbsp;Megan MacDonald,&nbsp;Eben Thoma,&nbsp;Tim Dye,&nbsp;Jan-Michael Archer,&nbsp;Michael Bergin,&nbsp;Wilton Mui,&nbsp;Brandon Feenstra,&nbsp;Michael Ogletree,&nbsp;Christi Chester-Schroeder and Naomi Zimmerman,&nbsp;","doi":"10.1021/acsestair.4c0012510.1021/acsestair.4c00125","DOIUrl":"https://doi.org/10.1021/acsestair.4c00125https://doi.org/10.1021/acsestair.4c00125","url":null,"abstract":"<p >Air sensors can provide valuable nonregulatory and supplemental data as they can be affordably deployed in large numbers and stationed in remote areas far away from regulatory air monitoring stations. Air sensors have inherent limitations that are critical to understand before collecting and interpreting the data. Many of these limitations are mechanistic in nature, which will require technological advances. However, there are documented quality assurance (QA) methods to promote data quality. These include laboratory and field evaluation to quantitatively assess performance, the application of corrections to improve precision and accuracy, and active management of the condition or state of health of deployed air quality sensors. This paper summarizes perspectives presented at the U.S. Environmental Protection Agency’s 2023 Air Sensors Quality Assurance Workshop (https://www.epa.gov/air-sensor-toolbox/quality-assurance-air-sensors#QAworkshop) by stakeholders (e.g., manufacturers, researchers, air agencies) and identifies the most pressing needs. These include QA protocols, streamlined data processing, improved total volatile organic compound (TVOC) data interpretation, development of speciated VOC sensors, and increased documentation of hardware and data handling. Community members using air sensors need training and resources, timely data, accessible QA approaches, and shared responsibility with other stakeholders. In addition to identifying the vital next steps, this work provides a set of common QA and QC actions aimed at improving and homogenizing air sensor QA that will allow stakeholders with varying fields and levels of expertise to effectively leverage air sensor data to protect human health.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"1 10","pages":"1203–1214 1203–1214"},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}