ACS ES&T Air最新文献_第9页

Exploring SO2 Photooxidation to Sulfates on Organic Carbon from PM2.5: Kinetics, Mechanism, and Dependence on Physicochemical Properties PM2.5中有机碳对SO2光氧化生成硫酸盐的研究：动力学、机理及对理化性质的依赖

ACS ES&T Air Pub Date : 2026-08-14 Epub Date: 2026-07-28 DOI: 10.1021/acsestair.6c00047

Hongxing Yang, Wangjin Yang, Jianwei Zheng, Shaojie Yang, Fu Li, Hongxia Lei, Ning Tang, Chong Han

{"title":"Exploring SO2 Photooxidation to Sulfates on Organic Carbon from PM2.5: Kinetics, Mechanism, and Dependence on Physicochemical Properties","authors":"Hongxing Yang, Wangjin Yang, Jianwei Zheng, Shaojie Yang, Fu Li, Hongxia Lei, Ning Tang, Chong Han","doi":"10.1021/acsestair.6c00047","DOIUrl":"https://doi.org/10.1021/acsestair.6c00047","url":null,"abstract":"The oxidation process of SO2 on organic carbon(OC)may act as a significant source of sulfates, whereas the photochemicalconversion of SO2 to sulfates on OC in atmospheric PM2.5 is not well understood. The SO2 uptake and sulfateformation during the reaction of SO2 with OC under irradiationwere systematically explored in a flow tube reactor coupled with spectroscopyand chromatography methods. Light can markedly enhance SO2 uptake and sulfate formation on OC. The photochemical reactivityof OC exhibited seasonal characteristics, as evidenced by distinctSO2 uptake coefficients and sulfate formation mass. Photogeneratedelectrons, •O2– and •OH,were measured, and •OH originating from OC was confirmed asthe primary active species that oxidized SO2 to sulfates.The photochemical reactivity of OC greatly depended on the physicochemicalproperties, including light absorption properties, hydrophilicity,and •OH generation ability, which were related to the contentsof chromophores (aromatic C–H and C═O) and hydrophilicgroups (O–H, C–O, and C═O). According to experimentalresults, SO2 lifetime and sulfate formation rate duringthe reaction with OC were evaluated as 4.24–56.01 days and0.04–0.34 μg·m–3·h–1, respectively, highlighting the significant role of OC in atmosphericsulfate sources.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2001–2011"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729779","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}

引用次数: 0

From Streets to Seats: Assessment of Tire Wear Particles and Tire Additive Chemicals in Australian Urban Dust 从街道到座位：澳大利亚城市灰尘中轮胎磨损颗粒和轮胎添加剂化学物质的评估

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-22 DOI: 10.1021/acsestair.6c00072

Simran Kaur, Kevin V. Thomas, Cassandra Rauert

{"title":"From Streets to Seats: Assessment of Tire Wear Particles and Tire Additive Chemicals in Australian Urban Dust","authors":"Simran Kaur, Kevin V. Thomas, Cassandra Rauert","doi":"10.1021/acsestair.6c00072","DOIUrl":"10.1021/acsestair.6c00072","url":null,"abstract":"Tirewear particles (TWPs) and tire additive chemicals (TACs) areincreasingly being recognized as important nonexhaust traffic emissions,yet their atmospheric transport and accumulation in residential environmentsremain poorly characterized. In this study, TWPs and TACs were quantifiedin urban dust collected from 30 outdoor residential balconies acrossthe Brisbane metropolitan region, Australia, using pyrolysis gas chromatography–massspectrometry (Pyr-GC/MS) and liquid chromatography-tandem mass spectrometry(LC-MS/MS). TWP deposition rates ranged from <0.0006 to 4.1 mg/m2/day (median 0.3 mg/m2/day), while total TAC surfaceloadings (∑TACs) ranged from <0.01 to 316 ng/m2/day (median 69 ng/m2/day). Elevated TWP deposition wasprimarily associated with low wind speed. TAC concentrations showedweaker coupling with particle mass, with TAC/TWP ratios spanning morethan 2 orders of magnitude across sites. Near-Central Business District(CBD) balconies showed markedly elevated TAC/TWP ratios (median 333ng/mg vs 101 ng/mg, within 5 km from the CBD), indicating chemicalenrichment relative to particle mass and suggesting atmospheric transformation.6PPD-quinone (N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine-quinone) wasdetected at 23 of the 30 sampled balconies, demonstrating its widespreadoccurrence in outdoor residential dust. These findings indicate thatresidential balconies act as sinks for airborne TWPs and TACs. Importantly,TAC concentrations do not necessarily scale with total TWP, suggestingchemical enrichment relative to particle mass driven by atmosphericprocessing and redistribution during airborne transport. This studyprovides the first quantitative evidence of TWPs and TACs in Australianurban dust and highlights the need to jointly consider particulateand chemical components when evaluating urban tire-related pollutionand potential human exposure pathways.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1865–1876"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148624897","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}

引用次数: 0

A Census Tract-Level Modeling Framework for the Estimation of Health Co-Benefits of Decarbonization in New York State 估算纽约州脱碳的健康协同效益的人口普查区域级建模框架

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-05-28 DOI: 10.1021/acsestair.5c00506

Saravanan Arunachalam, Catherine A. Seppanen, Brian F. Naess, Bin Cheng, Jiacheng Yang, David M. Cooley, Caroline H. Watson, Olivia E. Salmon, Rachel F. Silvern, Hillel Hammer

{"title":"A Census Tract-Level Modeling Framework for the Estimation of Health Co-Benefits of Decarbonization in New York State","authors":"Saravanan Arunachalam, Catherine A. Seppanen, Brian F. Naess, Bin Cheng, Jiacheng Yang, David M. Cooley, Caroline H. Watson, Olivia E. Salmon, Rachel F. Silvern, Hillel Hammer","doi":"10.1021/acsestair.5c00506","DOIUrl":"10.1021/acsestair.5c00506","url":null,"abstract":"Tools quantifyingcopollutant and public health benefits of decarbonizationpolicies typically have coarse resolution, limiting the understandingof local impacts and underestimating benefits. We present the NewYork Community-Scale Health and Air Pollution Policy Analysis (NY-CHAPPA)tool, a new high-resolution modeling framework to quantify the impactsof energy policies in NY on fine particulate matter (PM2.5) concentrations and public health at the census tract scale. NY-CHAPPAintegrates two existing reduced-form models: C-TOOLS for local-scaledispersion and COBRA for regional-scale transport to estimate totalPM2.5 concentrations, physical health impacts, and theirmonetized value. We demonstrate the efficacy of NY-CHAPPA by applyinga NY-specific policy scenario and compare results with COBRA at countyscale. Under the policy scenario in 2050, NY-CHAPPA estimates substantiallygreater reductions in PM2.5 concentrations (4–34%across NY counties compared to 2–8% with COBRA) and $495B incumulative public health benefits from 2025 to 2050, which is 95%higher than COBRA. The largest reductions in PM2.5 concentrationswere projected in densely populated urban areas. NY-CHAPPA enablesquantification of community-scale benefits in NY’s disadvantagedcommunities, defined at census tract scale and not explicitly representedin other models, informing policy and investments. Statewide, projectedper capita benefits in disadvantaged communities were 58% higher thanin other communities.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1745–1757"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666577","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}

引用次数: 0

Mechanisms for the Enhancement of Nitrate Photodegradation by Brown Carbon 棕炭促进硝酸盐光降解的机理研究。

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-25 DOI: 10.1021/acsestair.6c00079

Aaron Lieberman, Kam-Tung Chan, Murat Onder, Davide Donadio, Cort Anastasio

{"title":"Mechanisms for the Enhancement of Nitrate Photodegradation by Brown Carbon","authors":"Aaron Lieberman, Kam-Tung Chan, Murat Onder, Davide Donadio, Cort Anastasio","doi":"10.1021/acsestair.6c00079","DOIUrl":"10.1021/acsestair.6c00079","url":null,"abstract":"Reactive nitrogen species (NOy)─suchas nitrogen dioxide (NO2), nitric oxide (NO), and nitrousacid (HONO)─impact both the chemistry and oxidative capacityof the troposphere. Nitrate photodegradation, which releases NOy, is enhanced by some light-absorbing organicmolecules, i.e., brown carbon (BrC), but the mechanisms for enhancementremain poorly constrained. Here, we investigate how the photodegradationof aqueous nitrate is affected by five model BrC photosensitizersusing illumination experiments and quantum chemical calculations.Nitrate photodegradation is not enhanced by oxidizing triplet excitedstates (3,4-dimethoxybenzaldehyde (DMB) and benzophenone (BP)) orby an efficient source of singlet oxygen (perinaphthenone (PN)), butis enhanced by N,N-dimethylaniline(NN-DMA) and vanillic acid (VA). Based on a kinetic model, electron-transferreactions dominate the enhancement from NN-DMA, while solvated electronsmake a smaller contribution. In contrast to NN-DMA, vanillic acidacts through a different, as-yet-unidentified mechanism that is second-orderin the fully deprotonated form of VA. Based on ab initio calculations, energy-transfer reactions are not significant in ourexperiments because the energy of the nitrate triplet excited stateis higher than the triplet energies of any of the five model chromophores.Overall, our results indicate there are at least three mechanismsby which brown carbon can enhance nitrate photodegradation.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1888–1899"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148451243","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}

引用次数: 0

Quantification Error Model for Aerial LiDAR Methane Emission Rate Estimates 航空激光雷达估算甲烷排放率的量化误差模型

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-08 DOI: 10.1021/acsestair.5c00458

Cameron D. Dudiak, Devin B. Goodwin, Dominic T. Altamura, Christopher P. Donahue, Michael J. Thorpe

{"title":"Quantification Error Model for Aerial LiDAR Methane Emission Rate Estimates","authors":"Cameron D. Dudiak, Devin B. Goodwin, Dominic T. Altamura, Christopher P. Donahue, Michael J. Thorpe","doi":"10.1021/acsestair.5c00458","DOIUrl":"10.1021/acsestair.5c00458","url":null,"abstract":"Accurate characterization of methane emission rate quantificationerror (QE) is essential for building measurement-based emissions inventoriesthat benchmark emissions, guide mitigation, and satisfy reportingframeworks such as OGMP 2.0. Previous studies have summarized QE usingdistributions of errors from controlled release experiments, but withlimited consideration of environmental conditions or plume characteristics.We address this gap by developing a continuous QE model as a functionof local wind speed and measured signal-to-noise ratio (SNR). Candidatemodels with diverse functional forms are fitted by maximum likelihoodestimation and evaluated using the Akaike Information Criterion ona data set of 2,178 single- and double-blind controlled releases acrosssix test sites scanned with dozens of Bridger Photonics’ GasMapping LiDAR (GML) 2.0 sensors. Results show that GML QE can be decomposedinto two components, bias and uncertainty, where bias is primarilycontrolled by SNR, and uncertainty is jointly controlled by SNR andwind speed. Bias corrections derived from the model are reinforcedby physical principles, providing confidence in their origin and application.Integrating these corrections into U.S. basin inventories reducessystematic inventory bias by up to 17.5%, enabling more accurate,transparent, and comparable methane emission estimates.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1704–1716"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148672637","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}

引用次数: 0

Evolving Urban–Rural Disparities in Ozone Sensitivity Reveal Shifting Emission Contributions in Different Regions in China 城乡臭氧敏感性差异的演变揭示了中国不同地区排放贡献的变化

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-08 DOI: 10.1021/acsestair.6c00102

Yi Qing, Wenchao Han, Yufan Dai, Wenze Li, Jiachen Meng, Mindong Chen, Xinlei Ge, Ming Wang, Haiwei Li, Yunjiang Zhang, Yun Wu, Junfeng Wang, Jian Gao

{"title":"Evolving Urban–Rural Disparities in Ozone Sensitivity Reveal Shifting Emission Contributions in Different Regions in China","authors":"Yi Qing, Wenchao Han, Yufan Dai, Wenze Li, Jiachen Meng, Mindong Chen, Xinlei Ge, Ming Wang, Haiwei Li, Yunjiang Zhang, Yun Wu, Junfeng Wang, Jian Gao","doi":"10.1021/acsestair.6c00102","DOIUrl":"10.1021/acsestair.6c00102","url":null,"abstract":"Surfaceozone (O3) pollution has significant healthand environmental impacts. Clarifying the distribution of urban–ruraldisparities in ozone (URD-O3) is crucial for targeted O3 management. However, the evolution patterns and the drivingfactors of URD-O3 remain unclear. This study analyzed thespatiotemporal evolution of O3, emissions and meteorology,in Beijing–Tianjin–Hebei (BTH) and Yangtze River Delta(YRD) from 2013 to 2020 in China, and quantitatively evaluated theirrelative contributions to URD-O3. Results show a cleardivergence in URD-O3 around 2017. Before 2017, urban O3 in BTH was lower than rural levels but exceeded rural levelssubsequently, peaking at 1.18 μg/m3 in 2020. In contrast,YRD consistently showed higher urban O3, where URD-O3 increased by 58.9% from 2013 to 2017 and stabilized thereafter.Moreover, the relative contributions of emissions in two regions areopposite. In BTH, the contribution of emissions to URD-O3 decreased from 40.1% to 20.2%, while it increased from 33.7% to45.9% in YRD from 2013 to 2020. This result was attributed to thechanges in O3 sensitivity, the URD-O3 sensitivitycontinuously narrowed in BTH, but widened in the YRD, altering theimpact of emissions on O3 formation. This study highlightsthe importance of O3 sensitivity in O3 targetedgovernance.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1900–1910"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148650983","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}

引用次数: 0

Correspondence on “Oil Sands Facilities Are an Emission Source of Naphthenic Acid Fractional Compounds to the Atmosphere” 关于“油砂设施是环烷酸组分向大气排放源”的函电

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-08 DOI: 10.1021/acsestair.5c00382

Jayne E. Rattray, Charles Grimm, Aprami Jaggi, John Gibson

引用次数: 0

Nontargeted Calibration: A Novel Method for Understanding Uptake Kinetics of Diverse Compounds Using Passive Air Samplers 非目标校准：一种利用被动空气采样器理解不同化合物摄取动力学的新方法

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-18 DOI: 10.1021/acsestair.6c00185

Alyss S.V. McPherson, Celine Su, Ellie Davies, Anya Guo, Joseph O. Okeme

{"title":"Nontargeted Calibration: A Novel Method for Understanding Uptake Kinetics of Diverse Compounds Using Passive Air Samplers","authors":"Alyss S.V. McPherson, Celine Su, Ellie Davies, Anya Guo, Joseph O. Okeme","doi":"10.1021/acsestair.6c00185","DOIUrl":"10.1021/acsestair.6c00185","url":null,"abstract":"Conventional calibration of passiveair samplers (PASs)is limitedby the accessibility of analytical standards required for quantifyingmass in targeted analysis. Here, we introduce a method using relativepeak areas measured with nontargeted analysis to approximate PAS uptakerates for diverse features. We tested the approach with mesh-shelteredpolydimethylsiloxane (PDMS) foam and glass fiber filter (GFF) PASs.Generic uptake rates were 1.16 ± 0.34 m3 day–1 dm–2 for 67 features measured in PDMS foam and0.50 ± 0.33 m3 day–1 dm–2 for 48 features measured in GFF, comparable to uptake rates fromthe targeted calibration literature. The generic uptake rate for PDMS-Meshshowed low variability (relative standard deviation─RSD = 29%)with no relationship to predicted physical–chemical properties.The generic rate for GFF-Mesh was instead 0.61 ± 0.20 m3 day–1 dm–2 when including onlyfeatures with predicted log octanol-air partition ratios (KOAs) < 8.5 log units, showing decreased variability (from 66% to32% RSD). Specific uptake rates should be used for features with KOAs > 8.5 log units measured on GFF-Mesh. Our results demonstratethat nontargeted calibration can characterize PAS uptake for diversecompounds comparably to targeted calibration, which will expand ourunderstanding of uptake kinetics without requiring analytical standards.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1935–1948"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666623","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}

引用次数: 0

Revisiting Multiphase Reactions in Deliquesced Aerosol Particles in the Presence of NO2 and SO2 在NO2和SO2存在下溶解气溶胶颗粒中的多相反应

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-15 DOI: 10.1021/acsestair.6c00008

Nanami Emori, Masao Gen

{"title":"Revisiting Multiphase Reactions in Deliquesced Aerosol Particles in the Presence of NO2 and SO2","authors":"Nanami Emori, Masao Gen","doi":"10.1021/acsestair.6c00008","DOIUrl":"10.1021/acsestair.6c00008","url":null,"abstract":"Nitrogendioxide (NO2) is a crucial precursor to nitratevia heterogeneous hydrolysis. It is a key oxidant in multiphase sulfurdioxide (SO2) oxidation, which is recognized as the primarysource of sulfate production during Beijing haze episodes. However,the multiphase reaction of NO2 and SO2 in deliquescedaerosol particles remains elusive due to competing pathways. Here,we examine the kinetics of multiphase reactions in deliquesced aerosolparticles in the presence of NO2 and SO2. Resultsshow pH-dependent competition between nitrate and sulfate production.We find enhanced sulfate production in air compared with N2, indicating an unaccounted-for reaction pathway involving the NO2 + SO2 reaction to form sulfite radical anions,which then react with molecular oxygen, rather than with additionalNO2, to initiate the radical chain reaction for sulfateproduction. As a result, the present pathway yields sulfate production∼1 order of magnitude higher than the conventional NO2 pathway. Kinetic calculations predict that the updated NO2 pathway shows the highest sulfate production rate among the prevailingoxidation pathways involving ozone, transition-metal ions, and hydrogenperoxide at pH > 4.5 under the haze conditions.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1782–1788"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666468","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}

引用次数: 0

PMF Analysis of PTR-MS Measurements Provides an Assessment of VOC Sources in an Occupied Student Office PTR-MS测量的PMF分析提供了一个被占用的学生办公室VOC来源的评估

ACS ES&T Air Pub Date : 2026-07-10 Epub Date: 2026-06-17 DOI: 10.1021/acsestair.6c00065

Jillian P. Downey, Hongru Shen, Jonathan P. D. Abbatt

{"title":"PMF Analysis of PTR-MS Measurements Provides an Assessment of VOC Sources in an Occupied Student Office","authors":"Jillian P. Downey, Hongru Shen, Jonathan P. D. Abbatt","doi":"10.1021/acsestair.6c00065","DOIUrl":"10.1021/acsestair.6c00065","url":null,"abstract":"Althoughindoor volatile organic compounds (VOCs) can cause adversehealth effects, the relative importance of different sources in indoorenvironments and the factors controlling them remain uncertain. Inthis work we analyzed real-time PTR-MS measurements using positivematrix factorization (PMF) to determine VOC sources in an occupiedstudent office. The PMF analysis was conducted using a subset of VOCdata that did not include VOCs largely from personal care products,as they exhibited episodic, unpredictable behavior. The major sourceswere identified as prompt human emissions, emissions from buildingmaterials, outdoor air, and long-lived human oxidation, accountingfor 21%, 44%, 9%, and 25% of the total VOCs, respectively. In additionto direct emissions, humans contributed to indoor VOCs through skinoil surface ozonolysis and surface re-emission, resulting in sustainedimpact hours after occupants had left the office. The PMF analysisdemonstrated that the outgassing rate of VOCs from building materialsis positively impacted by relative humidity and that most VOCs arisefrom indoor processes and chemistry, not via introduction of outdoorair. Overall, this work delivers an assessment of indoor VOC sources,advancing our understanding of their relative importance and the keyfactors governing their contributions within occupied environments.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 7","pages":"1853–1864"},"PeriodicalIF":0.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148682583","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}

引用次数: 0