ACS ES&T Air最新文献

{"title":"Decamethylcyclopentasiloxane (D5) Oxidation: Product Chemistry, Influence of RO2 Fate, and Secondary Aerosol Production","authors":"Saeideh Mohammadi,&nbsp;Jeewani N. Meepage,&nbsp;Christopher E. Brunet,&nbsp;Rachel F. Marek,&nbsp;Keri C. Hornbuckle,&nbsp;Eleanor C. Browne,&nbsp;Elizabeth A. Stone,&nbsp;Charles O. Stanier","doi":"10.1021/acsestair.6c00037","DOIUrl":"https://doi.org/10.1021/acsestair.6c00037","url":null,"abstract":"<p>Volatile methylsiloxanes (VMS), particularly decamethylcyclopentasiloxane(D₅), are recognized anthropogenic precursors of secondaryorganic aerosol (SOA), yet their formation pathways, product distributions,and yields under atmospherically relevant conditions remain poorlyconstrained. This study examines D₅-derived SOA acrossa wide range of OH exposures (OH_exp) and peroxy radical(RO₂) fates (RO₂+HO₂ and RO₂+OH) in an oxidation flow reactor, with comparison to ambient andchamber samples. The siloxanol (1-hydroxynonamethylcyclopentasiloxane,D₄TOH) is consistently observed. Under low OH_exp and HO₂-dominated regimes, samples contained multipleearly generation siloxanols accompanied by dimers and high molecularweight products, contrary to expectations that such species requireextensive oxidation. As OH_exp and RO₂ + OH reactivityincrease, total SOA mass rises, and the fraction of unresolved materialincreases. The observations were compared to a volatility basis set(VBS) multigenerational oxidation kinetic box model with explicitsiloxanols. The model’s strongly monotonic progression in volatility,aerosol yield, and degree of OH substitution in the polysiloxanolseries diverged from experimental data, aside from the expected increasein yield with OH_exp. At high OH_exp, the productdistribution and yield appear to be insensitive to RO₂+HO₂ vs RO₂+OH fate.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"1988–2000"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729558","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":"Facility-Scale Detection and Quantification of Gas Flaring Using Imaging Spectrometers","authors":"Jinsol Kim,&nbsp;Daniel H. Cusworth,&nbsp;Bradley M. Conrad,&nbsp;Riley M. Duren","doi":"10.1021/acsestair.6c00181","DOIUrl":"https://doi.org/10.1021/acsestair.6c00181","url":null,"abstract":"<p>Globally, over 140billion cubic meters of natural gas are flaredeach year, according to the VIIRS Nightfire (VNF) data product derivedfrom satellite observations by the Visible Infrared Imaging RadiometerSuite (VIIRS), the most widely used instrument for global flare monitoring.Although VIIRS routinely tracks global flaring activity through nighttimeobservations, its coarse spatial resolution limits the ability toattribute flares to specific facilities or operators. Here, we presentflare detection and quantification using high spatial resolution imagingspectrometers. We demonstrate that NASA’s Earth Surface MineralDust Source Investigation (EMIT) is capable of detecting flares atindividual flare stacks with a probability of detection (POD) comparableto that of VIIRS. We further attribute the detected flare stacks inthe Permian Basin during 2023 to individual operators and evaluateEMIT’s potential to estimate annual flared gas volumes at theoperator level. We find good correspondence between the EMIT-observedradiant heat values and reported annual flared gas volume on the operatorlevel. Despite limited temporal sampling relative to VIIRS, EMIT achievesaccuracy comparable to VIIRS-based annual flaring estimates, whileproviding operator-level attribution. This highlights the value ofhigh-resolution imaging spectrometers in regulatory and mitigationefforts by adding insights at the operator level that can complementexisting VIIRS observations, enabling more comprehensive flare monitoringand analysis.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2187–2195"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729633","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":"Investigating Uncertainties in Air Pollutant Emissions of Structure and Biomass Burning from the 2025 Los Angeles Fires","authors":"Soroush E. Neyestani,&nbsp;Hao Hu,&nbsp;Dandan Wei,&nbsp;Sam J. Silva,&nbsp;Joshua L. Laughner,&nbsp;Yunhan Huang,&nbsp;Xanthe Saalmann,&nbsp;Xinyi Zhang,&nbsp;Jiachen Zhang","doi":"10.1021/acsestair.6c00107","DOIUrl":"https://doi.org/10.1021/acsestair.6c00107","url":null,"abstract":"<p>The January 2025 wildland–urban interface (WUI)fires inLos Angeles (LA) County significantly affected regional air quality.Here, using the best available fuel loading data sets, emission factor(EF) measurements, and satellite fire products, we develop a high-resolution,spatiotemporally resolved emissions inventory of structure burningfor the LA fires. Our results reveal substantial uncertainties inestimated structure burning emissions, driven by variability in EFs,building damage fractions, and combustible mass loading. We also incorporatebuilding composition (e.g., wood and other materials) when estimatingstructure burning emissions and find that accounting for buildingcomposition changes emission estimates. Our uncertainty quantificationanalysis indicates larger uncertainties for NO_X and COemissions and smaller uncertainties for PM_2.5 emissions.We further compare biomass burning emissions across five commonlyused inventories and find large variability among inventories, withdifferences reaching up to a factor of 73 depending on pollutant andfire event. These findings highlight the need for improved buildingcomposition, damage, and EF data to reduce uncertainties in WUI fireemission estimates. Emission inventories in this study could be usedin air quality models to investigate the air quality impacts and associateduncertainties of the LA fires.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2042–2054"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729800","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":"Understanding the Temporal Evolution of Isoprene Organosulfates Using a Novel Hydrophilic Interaction Chromatography Method","authors":"Ping Liu,&nbsp;Daniel J. Bryant,&nbsp;Carys Williams,&nbsp;Rhianna L. Evans,&nbsp;James R. Hopkins,&nbsp;Sri H. Budisulistiorini,&nbsp;Michael Flynn,&nbsp;Nathan A. I. Watson,&nbsp;James D. Allan,&nbsp;W. Joe F. Acton,&nbsp;William. J. Bloss,&nbsp;Connor Prior,&nbsp;William Unsworth,&nbsp;Xiang Ding,&nbsp;Andrew R. Rickard,&nbsp;Jacqueline F. Hamilton","doi":"10.1021/acsestair.5c00460","DOIUrl":"https://doi.org/10.1021/acsestair.5c00460","url":null,"abstract":"<p>Organosulfates (OSs)form a significant component of secondaryorganic aerosol (SOA) in the atmosphere. Previously, their measurementusing reversed-phase liquid chromatography–high-resolutionmass spectrometry (RPLC–HRMS) has led to poor retention andsignificant matrix effects. Hydrophilic interaction liquid chromatography(HILIC) provides improved retention of polar OSs, such as those formedfrom isoprene oxidation, and reduced matrix effects. Studies employingHILIC predominantly use gradient elution to separate OSs with varyingpolarities. HILIC, however, is very sensitive to changes in the waterlayer within the column, which facilitates separation, meaning thecolumn needs to be thoroughly equilibrated before each injection,significantly increasing analysis time, cost, and solvent waste. Thework presented here describes the development of an isocratic HILICmethod to analyze OSs in complex ambient PM_2.5 samples.This new method significantly reduces solvent usage and analysis time,which is vital for the analysis of large quantities of samples. Themethod was first validated with synthesized isoprene-derived OS tracers(iOS) and commercially available standards, then applied in the iOSanalysis of filter samples collected during the summertime in Manchester,England. Eight filter samples were taken each day, allowing the temporalevolution of iOS tracers to be elucidated. For 336 ambient samplesanalyzed in this work, the adoption of the isocratic method resultedin a total time saving of 61 h and reduced organic solvent usage by1.68 L. The targeted analysis of iOS was quantified using authenticstandards. Five 2-methyltetrol OS isomers were quantified (C₅H₁₂O₇S; MTOS_1–4, 6) averaging 0.36,0.11, 1.25, 2.12, and 0.17 ng m^–3, respectively.The average concentration of total 2-methyltetrol OS was 3.99 ng m^–3, and 2-methylglyceric acid OS (C₄H₈O₇S: MGOS) was 1.07 ng m^–3.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"1957–1965"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729547","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":"Overlooked Component of Diesel Exhaust: Condensable Particulate Matter from Heavy-Duty Diesel Engines","authors":"Ruxin Zhu,&nbsp;Gang Wang,&nbsp;Xiaonuo Yang,&nbsp;Zizhen Ma","doi":"10.1021/acsestair.6c00179","DOIUrl":"https://doi.org/10.1021/acsestair.6c00179","url":null,"abstract":"<p>Condensableparticulate matter (CPM) has long been overlooked indiesel exhaust, yet this study reveals that it constitutes the dominantfraction of total particulate matter (TPM) from modern heavy-dutydiesel engines equipped with advanced aftertreatment systems. Usingan indirect dilution sampling system, two engines meeting China Vand China VI emission standards were tested under steady-state conditions(idle, 25%, 55%, and 75% loads). Filterable particulate matter (FPM)emissions were below the method detection limit across all conditions,confirming that solid particles are effectively eliminated. In strikingcontrast, CPM emissions remained substantial: for the China V engine,emission factors decreased from 488.3 mg/kg-fuel under idle to 46.6mg/kg-fuel at 75% load; for the China VI engine, they decreased from307.4 mg/kg-fuel to 90.7 mg/kg-fuel, though a slight rebound at highload suggests trade-offs associated with exhaust gas recirculation.Organic matter accounted for 57.8% to 94.8% of CPM mass, with intermediate-volatilityand semivolatile organic compounds (I/SVOCs) being the major speciesamong the detected organic compounds. Inorganic CPM was primarilycomposed of ammonium salts. These findings demonstrate that CPM hasbecome the overlooked yet dominant particulate source from moderndiesel engines, demanding urgent integration into emission inventoriesand control strategies.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2175–2186"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729741","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":"Wildfire Smoke Challenges Attainment of the Strengthened U.S. Annual PM2.5 Standard through Regional and Transboundary Contributions","authors":"Mashiat Hossain,&nbsp;Tessa M. Clarizio,&nbsp;Hannah M. Horowitz","doi":"10.1021/acsestair.6c00101","DOIUrl":"https://doi.org/10.1021/acsestair.6c00101","url":null,"abstract":"<p>The recently strengthened U.S. annual standard for fineparticulatematter (PM_2.5) of 9 μg m^–3 narrowscompliance margins nationwide, yet the implications of increasingwildfire activity for meeting this standard remain uncertain. Here,we use high-resolution nested GEOS-Chem simulations with emissionsensitivity experiments for 2021–2023 to attribute annual PM_2.5 sources across the contiguous U.S. We find that severefires in the western U.S. in 2021 produce substantial regional PM_2.5 enhancements and state-level exceedances. In 2023, simulationsshow that the unprecedented Canadian wildfire season leads to widespreadexceedances across the Northeast and Midwest, exposing more than 150million people to concentrations above the current standard. Sensitivitysimulations indicate that reductions in domestic anthropogenic emissionsalone are insufficient to eliminate exceedances in smoke-influencedyears. PM_2.5 composition exhibits strong seasonal contrasts,with nitrate aerosols dominating wintertime concentrations, whileorganic aerosols become regionally prominent in summer during wildfiresmoke episodes. Comparison with surface observations indicates thatthe model captures the spatial variability of PM_2.5 butexhibits a persistent low bias in annual mean concentrations. Overall,these results show that wildfire activity can offset gains from anthropogenicemission controls and increasingly constrain future attainment ofthe strengthened annual PM_2.5 standard.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2028–2041"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729407","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":"Beyond Bulk Metrics: A Molecular-Level Framework Reveals How Transport and Partitioning Shape Indoor Organic Aerosols","authors":"Xiaoqiao Jiao,&nbsp;Wangchao Zhao,&nbsp;Lifang Zhang,&nbsp;Bo Yang,&nbsp;Li Zhou,&nbsp;Wenting Yuan,&nbsp;Jiwen Xu,&nbsp;Yaling Zeng,&nbsp;Guomao Zheng,&nbsp;Haiyun Shi,&nbsp;Bin Ye,&nbsp;Huizhong Shen,&nbsp;Shu Tao,&nbsp;Chen Wang","doi":"10.1021/acsestair.6c00147","DOIUrl":"https://doi.org/10.1021/acsestair.6c00147","url":null,"abstract":"<p>A precise understanding of indoorparticle dynamics requires movingbeyond traditional mass- or number-based metrics, which lack the detailedmolecular composition information needed to identify key processesgoverning organic aerosols (OAs). Here, we developed and applied anovel molecular-level framework based on nontarget, high-resolutionmass spectrometry analysis of OA composition from multiple sites.This framework resolves the impacts of transport and partitioning,as demonstrated by characterizing particles simultaneously collectedfrom the living room, kitchen, and outdoors of an apartment. Our analysisrevealed that outdoor transport was the primary source of living roomOA and that the indoor/outdoor ratios of specific components differfrom those of bulk particle mass, implying compound-specific transportbehaviors. Furthermore, semivolatile organic compounds were foundto partition from indoor surfaces into aerosols, as evidenced by benzalkoniumchloride cleaning experiments. These results demonstrate that transportand surface-gas partitioning critically shape OA composition at themolecular level, highlighting the limitations of conventional mass-and number-based approaches in capturing the drivers of compositionalchange and exposure-relevant indoor OA dynamics. More importantly,our framework provides a transferable approach with broad applicabilitybeyond this specific indoor environment, enabling future investigationsof OA evolution across various atmospheric settings.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2155–2165"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729410","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":"A Cost-Benefit Analysis Framework for Urban Methane Monitoring","authors":"Kimberly L. Mueller,&nbsp;Anna Karion","doi":"10.1021/acsestair.6c00084","DOIUrl":"https://doi.org/10.1021/acsestair.6c00084","url":null,"abstract":"<p>Despite recent advancesin measurement and monitoring,methane(CH₄) emissions remain challenging to resolve at subcityjurisdictions as needed to inform mitigation progress. Here we developan Observation System Simulation Experiment (OSSE) for New York City(NYC) to test whether a small number of strategically located, fixedin situ CH₄ measurement sites, together with existing sites,can effectively and accurately monitor NYC borough-level emissions.We identify candidate sites from tall, city-owned buildings screenedfor rooftop suitability and rank &gt;300 network configurations bytheirability to recover monthly borough-level emissions. Results show thatthe existing network improves coverage of Manhattan and Brooklyn relativeto having no network at all, but performance remains limited in StatenIsland and the Bronx. Adding a single site in either borough improvesperformance, while a three-site configuration spanning Staten Island,the Bronx, and Brooklyn captures most remaining gains, with littlebenefit beyond three sites. We also test a hypothetical set of observationsfrom commercial aircraft profiles and find that these can provideannual city-scale constraints, especially when few or no urban sitesexist, but are less effective than fixed sites for resolving month-to-month,borough-level variability. Together, the results demonstrate thatborough-scale CH₄ monitoring is feasible with a compact,purpose-built network within the context of a wider set of existingand background tower observations, and that OSSEs provide a low-costway to design such systems before deploying instruments.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2012–2019"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729417","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":"CASA: An Innovative Tool for Near-Real-Time Source Apportionment of Atmospheric Organic Aerosols","authors":"Mohamed Gherras,&nbsp;Jean-Eudes Petit,&nbsp;Aurélien Chauvigné,&nbsp;Alicia Gressent,&nbsp;Hasna Chebaicheb,&nbsp;Véronique Riffault,&nbsp;Jeni Vasilescu,&nbsp;Caroline Marchand,&nbsp;Valérie Gros,&nbsp;Olivier Favez","doi":"10.1021/acsestair.6c00094","DOIUrl":"https://doi.org/10.1021/acsestair.6c00094","url":null,"abstract":"<p>Since organic aerosols (OA) account for a significantfractionof PM worldwide, source apportionment is essential for effective airquality mitigation and policymaking. In the present study, we developeda novel method based on a chemical mass balance and an elastic netregressor (EN-CMB), using positive matrix factorization (PMF) as priorknowledge for near real-time source apportionment of OA. EN-CMB hasbeen integrated into a so-called continuous aerosol source apportionment(CASA) software package, which has been evaluated against state-of-the-artrolling-PMF data at three contrasted urban sites in Europe. CASA exhibitsvery satisfactory performance for primary OA components, with, atall sites, <em>R</em>² values of 0.87–0.97and mean bias error (MBE) of between −0.15 and 0.14 μg/m³. Secondary OA (SOA) fractions showed similar <em>R</em>² values (0.81–0.97), but slightly higher MBE values(ranging from −0.71 to 0.04 μg/m³), whichcan be related to the complex nature of SOA and is still acceptableregarding bulk trends. CASA allows near real-time operation and, asit is open source, represents a promising example of timely and efficientair pollution management with applications in real-time air qualitymonitoring. The next steps will enable community-driven initiativesto improve and expand the application of such open-source methodologiesacross diverse regions and emission sources.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"2020–2027"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729602","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":"Characterization of Particulate and Semivolatile Organic Emissions during Asphalt Milling and Paving","authors":"Merve Polat,&nbsp;Johannes Rex,&nbsp;Bo Strandberg,&nbsp;Karin Lóven,&nbsp;Lina Hagvall,&nbsp;Maria Hedmer,&nbsp;Matthew S. Johnson,&nbsp;Vilhelm Malmborg,&nbsp;Joakim Pagels,&nbsp;Jakob Klenø Nøjgaard","doi":"10.1021/acsestair.6c00019","DOIUrl":"https://doi.org/10.1021/acsestair.6c00019","url":null,"abstract":"<p>Growing concernsabout the impacts of asphalt work emissions haveincreased the need for detailed source characterization. Here, weinvestigated emissions generated during the milling of old asphaltand paving of new road surfaces. We combined real-time and off-linemeasurements using local monitoring and mobile monitoring mountedon road construction equipment to provide point-source informationon particle emissions and selected semivolatile species. Overall,analysis of the asphalt plume showed that individual work processeshave unique profiles of particulate mass concentration, size distribution,and chemical composition. Plumes from milling and sweeping are dominatedby coarse dust particles and vehicle exhaust soot. Fine particlesemitted during milling, paving, and compaction were found to be elevatedin organic compounds (OCs), particularly polycyclic aromatic hydrocarbons(PAHs), alkylated PAHs (Alk-PAHs), and dibenzothiophenes (DBTs), comparedto the background. Some OCs were present in the bitumen and were releasedduring paving. The strongest near-source emissions were observed duringpaving, where vehicle-bound samples showed substantially higher OC,PAH, Alk-PAH, and DBT concentrations than localized monitoring, emphasizingthe importance of sampling close to active asphalt handling. We foundthat certain classes were markers of specific work activities. Theenrichment of Alk-PAHs and DBTs suggested that these may serve asuseful markers for bitumen-derived emissions.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 8","pages":"1966–1975"},"PeriodicalIF":0.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148729500","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}