ACS ES&T Air最新文献_第4页

Validation of PurpleAir PM2.5 Sensors in Temperate Urban Environments PurpleAir PM2.5传感器在温带城市环境中的验证

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-18 DOI: 10.1021/acsestair.5c00443

Charles C. Sylvester, Nathaniel D. Hauenstein, Kabindra M. Shakya

{"title":"Validation of PurpleAir PM2.5 Sensors in Temperate Urban Environments","authors":"Charles C. Sylvester, Nathaniel D. Hauenstein, Kabindra M. Shakya","doi":"10.1021/acsestair.5c00443","DOIUrl":"https://doi.org/10.1021/acsestair.5c00443","url":null,"abstract":"Low-cost sensors (LCS), such as PurpleAir (PA), are widelyusedfor measuring fine particulate matter (PM2.5) because theyare inexpensive, easy to deploy, and provide publicly accessible data.However, PA sensors are known to overestimate PM2.5, andthus, several correction methods have been developed to improve theiraccuracy. In this study, we evaluated accuracy by comparing nationwideand locally derived correction methods during summer and spring seasons,examined PA output data types, assessed the influence of relativehumidity using both PA and weather station data, and analyzed theperformance after one year of field deployment. In the moderate climateof Philadelphia, the nationwide correction of Barkjohn et al. (2021)combined with using the mean value of two PAatm data outputs(RMSE = 1.640 μg/m3, MBE = 0.103 μg/m3, R2 = 0.683) for both 1 h and 24 h measurementsprovided the highest accuracy. Relative humidity measurements, whetherobtained from a weather station or the PA sensor, had minimal effecton PM2.5 accuracy (difference in R2 = 0.04). PA sensor accuracy declined after one year of use(R2 = 0.567), showing requiring extrasensor calibration in long-term deployment. This methodology enhancesthe performance of PA sensors and establishes greater trust in theLCS.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2503–2512"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153171","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

Methane Emissions from Postmeter Residential Natural Gas Infrastructure: Integrating Existing Data to Inform California’s Statewide Inventory 住宅天然气基础设施的甲烷排放：整合现有数据以通知加利福尼亚州的全州清单

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-24 DOI: 10.1021/acsestair.6c00131

Bijay Sharma, Wanyu R. Chan, William W. Delp, Eric D. Lebel, Yannai S. Kashtan, Colin J. Finnegan, Robert B. Jackson, Zachary Merrin, Paul W. Francisco, Marc L. Fischer, Sebastien C. Biraud, Helcio Blum, Vi H. Rapp, Brett C. Singer

{"title":"Methane Emissions from Postmeter Residential Natural Gas Infrastructure: Integrating Existing Data to Inform California’s Statewide Inventory","authors":"Bijay Sharma, Wanyu R. Chan, William W. Delp, Eric D. Lebel, Yannai S. Kashtan, Colin J. Finnegan, Robert B. Jackson, Zachary Merrin, Paul W. Francisco, Marc L. Fischer, Sebastien C. Biraud, Helcio Blum, Vi H. Rapp, Brett C. Singer","doi":"10.1021/acsestair.6c00131","DOIUrl":"https://doi.org/10.1021/acsestair.6c00131","url":null,"abstract":"This study compiles, synthesizes and analyzes existingmeasurementsof methane emissions from residential postmeter natural gas infrastructure,including (1) all infrastructure within a home under quiescent conditions,(2) pilot lights as discrete sources, (3) sustained combustion ofmain appliance burners, and (4) transient emissions during ignitionand extinguishment. Quiescent leak measurements in 64 houses and emissionsfrom 39 pilots and 509 appliances, mostly for cooking, water heatingand space heating, are combined with usage estimates to calculateannual emissions by appliance, housing type, and statewide in California.Per appliance, tankless and storage water heaters have the highestannual emissions (mean estimates of 2456 and 395 g CH4 yr–1, respectively) and the average pilot emits 355 gCH4 yr–1. Statewide residential postmeteremissions are estimated at 32.1 (90% CI: 21.0–52.9) Gg CH4 yr–1, improving a prior estimate from thesame quiescent data, 9 pilots and 129 appliances. This postmeter estimateis 2.2% of statewide methane emissions. This work also advances knowledgethrough improved estimates of pilot emissions, which account for 23%of quiescent and 15% of total residential; adding transients, estimatedat 11% of total; and providing inventories by appliance category andprocess.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2578–2590"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152851","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

Real-World Emission Dynamics of Tire and Road Wear Particles: Impacts of Micro-Driving Behaviors and Roadway Characteristics 轮胎和道路磨损颗粒的真实排放动力学：微驾驶行为和道路特性的影响

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-12 DOI: 10.1021/acsestair.6c00188

Salahuddin Setu, Mohamed Farag, Hesham Rakha, Hosein Foroutan

{"title":"Real-World Emission Dynamics of Tire and Road Wear Particles: Impacts of Micro-Driving Behaviors and Roadway Characteristics","authors":"Salahuddin Setu, Mohamed Farag, Hesham Rakha, Hosein Foroutan","doi":"10.1021/acsestair.6c00188","DOIUrl":"https://doi.org/10.1021/acsestair.6c00188","url":null,"abstract":"With the declineof exhaust emissions, non-exhaust sources─particularlytire and road wear particles (TRWP)─have emerged as a dominantcontributor to vehicular pollution. This concern is amplified by projectionsindicating substantial increases in TRWP emissions due to the growingelectric vehicle fleet. However, a comprehensive understanding ofTRWP generation under real-world micro-driving conditions remainslimited. In this study, we investigated near-wheel TRWP-related PMconcentrations using an instrumented vehicle operated on an access-controlledroad network comprising highways, suburban streets, and rural roads.A wide range of micro-driving behaviors─including steady-speedtravel, acceleration, deceleration, lane changes, cornering, merging,stop-and-go driving, and U-turns─were evaluated in conjunctionwith roadway design features such as pavement type, roadway grade,and horizontal curvature. Real-time measurements revealed that eachmicro-driving maneuver exerts a distinct influence on TRWP-relatedPM concentrations and differentially contributes to fine or coarseparticle generation, with the PM2.5 fraction of PM10 ranging from 0.49 to 0.82 across driving conditions. Additionally,roadway characteristics such as curve radius, pavement type, and roadwaygrade substantially affect measured particle concentrations. Thesefindings provide a comprehensive quantification of how driving behaviorsand roadway characteristics influence near-wheel TRWP-related PM concentrations,offering actionable insights for road design optimization and supportingthe development of future non-exhaust emission regulations.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2670–2683"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152919","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

Uptake of Ethylene Glycol by Sodium Nitrate Aerosols and Its Degradation in Mixed Particles Mediated via Nitrate Photolysis 硝酸钠气溶胶对乙二醇的吸收及其在混合颗粒中的降解

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-24 DOI: 10.1021/acsestair.6c00339

Subhamoy Saha, Subhash Sarkar, Mathi Pandiyathuray

{"title":"Uptake of Ethylene Glycol by Sodium Nitrate Aerosols and Its Degradation in Mixed Particles Mediated via Nitrate Photolysis","authors":"Subhamoy Saha, Subhash Sarkar, Mathi Pandiyathuray","doi":"10.1021/acsestair.6c00339","DOIUrl":"https://doi.org/10.1021/acsestair.6c00339","url":null,"abstract":"Organic components constitute a substantialfraction of atmosphericparticulate matter mostly incorporated via gas–particle partitioningand thereafter undergo extensive chemical processing, such as formationof secondary organic aerosol (SOA) with elevated O/C ratios via oxidation.Ethylene glycol, a semivolatile polyol, inherently having a high O/Cratio, is directly emitted into the atmosphere mostly in urban atmosphere.Nitrate is a major inorganic constituent of urban atmospheric aerosols,particularly under haze conditions. The present study demonstratesaccommodation of ethylene glycol (EG) within sodium nitrate (SN) aerosolvia heterogeneous nonreactive uptake with an uptake coefficient, γ,of 2.5 (±0.2) × 10–6 at 80% RH (relativehumidity). EG uptake is significantly suppressed at lower humidity,with reductions of ∼20% at 70% RH and ∼46% at 60% RH.Degradation of EG via in-particle nitrate-mediated photolysis proceedswith a rate constant of 6.9 × 10–5 s–1 at 80% RH and increased further on lowering of RH. Notably, evenat 80% RH, this particle-phase degradation rate is ∼5-foldhigher than the reported gas-phase rate. In situ micro-Raman and offlineGC/MS analysis showed formation of compounds with higher O/C ratios,such as glycolaldehyde, glyoxal, glycolic acid, oxalic acid, and formate.The formation of light-absorbing aldehydes (glyoxal, glycolaldehyde)may contribute to reduced solar albedo and brown carbon formation,thus enhancing in-particle photochemistry. Moreover, formation oforganic acids may induce physicochemical changes via complexationwith other metal ions, resulting in formation of organic salts thatwill modify the acidity, hygroscopicity, and optical properties ofaged particles. Collectively, these findings have implications forpolluted urban atmospheres, especially humid coastal regions withincreasing trends of both NOx and EG emissions which may significantlycontribute to SOA formation and represent an important atmosphericsink for EG.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2898–2908"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152929","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

Advanced Oxidation of Catechol in Atmospheric Waters 大气水体中儿茶酚的深度氧化

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-10 DOI: 10.1021/acsestair.6c00223

Deborah A. Adeyemi-Alabi, Josiel Barrios Cossio, Marcelo I. Guzman

{"title":"Advanced Oxidation of Catechol in Atmospheric Waters","authors":"Deborah A. Adeyemi-Alabi, Josiel Barrios Cossio, Marcelo I. Guzman","doi":"10.1021/acsestair.6c00223","DOIUrl":"https://doi.org/10.1021/acsestair.6c00223","url":null,"abstract":"Phenols such as catechol emitted during biomass burningand combustioncontribute to aqueous secondary organic aerosol (aqSOA) formation,influencing air quality and climate. Here, catechol (QH2) is used as a surface-active, water miscible model phenol to investigateadvanced oxidation in atmospheric waters. We demonstrate that exposureto ozone and Fenton’s reagent (FR; Fe2+ + H2O2) accelerates catechol oxidation and promotes o-quinone formation. Ozone contributes through direct oxidation,iron redox cycling, and reactive oxygen species generation in thecoupled O3/Fenton system. Experiments were conducted with200 μM catechol under variable conditions: (i) pH 1.0–9.0;(ii) ozone mixing ratios of 0.4–3.6 ppmv; (iii) presence/absenceof FR (1 μM Fe2+, 50 μM H2O2); and (iv) dimethyl sulfoxide (DMSO) as a hydroxyl radical(HO•) scavenger. Catechol loss was monitored byUV–visible spectroscopy at λmax = 276 nm.Product formation was tracked by UV–visible at λmax = 389 nm (o-quinone) and λmax = 490 nm (catechol–Fe complex). Kinetics were quantifiedwithin an early oxidative window (0–2 min), when H2O2 is rapidly consumed and radical production is mostactive. Under representative conditions (pH 3.0; O3(g) = 0.4 ppmv; FR present), catechol decayed with a pseudofirst order rate constant k′ = 1.69 ×10–2 min–1, substantially fasterthan in the absence of FR. Within the same window, o-quinone reached ∼7.5 μM. These results highlight howcoupled ozone–Fenton chemistry can accelerate phenolic oxidationin atmospheric aqueous phases, affecting aqSOA aging and optical properties.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2744–2754"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152990","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

Modeling Ultrafine Particles Near a Large, Commercial Airport Using High-Fidelity Aircraft Emission Inventories and Aircraft-Specific Aerosol Size Distribution with CMAQ 使用高保真飞机排放清单和飞机特定气溶胶尺寸分布与CMAQ模拟大型商业机场附近的超细颗粒

ACS ES&T Air Pub Date : 2026-10-09 Epub Date: 2026-09-09 DOI: 10.1021/acsestair.6c00146

Hyeongseok D. Kim, Christos Efstathiou, M. V. S. Ramarao, John L. Durant, Neelakshi Hudda, Kevin J. Lane, Jonathan I. Levy, Saravanan Arunachalam

{"title":"Modeling Ultrafine Particles Near a Large, Commercial Airport Using High-Fidelity Aircraft Emission Inventories and Aircraft-Specific Aerosol Size Distribution with CMAQ","authors":"Hyeongseok D. Kim, Christos Efstathiou, M. V. S. Ramarao, John L. Durant, Neelakshi Hudda, Kevin J. Lane, Jonathan I. Levy, Saravanan Arunachalam","doi":"10.1021/acsestair.6c00146","DOIUrl":"https://doi.org/10.1021/acsestair.6c00146","url":null,"abstract":"Aircraft are an important source of ultrafine particles(UFPs)near airports, yet their contributions remain poorly quantified inchemical transport models. We addressed limitations by integratinghigh-fidelity aircraft emissions inventories (AEIs) generated by theAviation Environmental Design Tool (AEDT) and an aircraft-specificaerosol size distribution (ASASD) into the Community Multiscale AirQuality (CMAQ) model for Boston Logan International Airport (KBOS).We conducted simulations with three different approaches of AEIs fora winter and a summer month in 2017. We compared modeled ultrafineparticle number concentrations (UFPNC) with measurements from sevenfield monitoring stations around KBOS. Without ASASD, CMAQ predictednegligible UFPNC aviation contributions for all three AEIs; however,incorporating ASASD with a high-fidelity AEI led to an estimate ofthe monthly average of aircraft-attributable UFPNCat up to 48.6% oftotal UFPNC. In addition, the combination of a high-fidelity AEI andASASD improved agreement with observed UFPNC. Distinct seasonal behaviorswere found, with particle emissions (non-volatile and volatile) dominatingUFPNC enhancements during winter. Both directly emitted particlesand SO2 driven nucleation led to ∼109.7% greaterUFPNC during summer. Our findings highlight the importance of usingAEIs that reflect aircraft movement and particle size characteristicsfor modeling UFP near airports.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 10","pages":"2616–2628"},"PeriodicalIF":0.0,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153042","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

Effects of VOC Mixtures and Oxidation Conditions on Particle-Bound ROS Formation, Persistence, and Cytotoxicity in Secondary Organic Aerosols VOC混合物和氧化条件对二次有机气溶胶中颗粒结合ROS形成、持久性和细胞毒性的影响

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-25 DOI: 10.1021/acsestair.6c00175

Lu Lu, Nethmi Y. Kasthuriarachchi, Laura-Helena Rivellini, Boon Huat Bay, Alex K. Y. Lee

{"title":"Effects of VOC Mixtures and Oxidation Conditions on Particle-Bound ROS Formation, Persistence, and Cytotoxicity in Secondary Organic Aerosols","authors":"Lu Lu, Nethmi Y. Kasthuriarachchi, Laura-Helena Rivellini, Boon Huat Bay, Alex K. Y. Lee","doi":"10.1021/acsestair.6c00175","DOIUrl":"https://doi.org/10.1021/acsestair.6c00175","url":null,"abstract":"Particle-bound reactive oxygen species (PB-ROS) are importantdeterminantsof the oxidative potential and health impacts of secondary organicaerosols (SOA). This study investigated PB-ROS formation, persistence,and cytotoxicity in SOA derived from biogenic (limonene and α-pinene)and anthropogenic (toluene) volatile organic compounds (VOCs), aswell as their mixtures. Our measurements showed that OH photooxidationproduced higher PB-ROS contents than ozonolysis. Among single VOCsystems, OH-derived toluene-SOA exhibited the highest PB-ROS levels,and limonene-SOA had the largest fraction of short-lived PB-ROS (∼40%for ozonolysis and ∼47% for OH photooxidation). VOC mixtureexperiments showed modest but distinct effects: under ozonolysis,co-oxidation slightly increased total PB-ROS and favored more persistentPB-ROS species, whereas under OH photooxidation, limonene–toluenemixtures enhanced short-lived PB-ROS formation compared to both purelimonene and toluene-derived SOA. PB-ROS contents correlated positivelywith the average carbon oxidation state<math><mo>(</mo><msub><mover><mi>OS</mi><mo>¯</mo></mover><mi>C</mi></msub><mo>)</mo></math>⁠, particularly for the more persistent fraction,indicating that <math><msub><mover><mi>OS</mi><mo>¯</mo></mover><mi>C</mi></msub></math>better reflects the characteristics ofmore persistent PB-ROS species. Cytotoxicity assays using a humanbronchial epithelial cell line showed that mixed-VOC SOA induced greatercell death than their individual precursors, with the limonene–toluenemixture exhibiting the strongest cytotoxicity. These findings demonstratethat PB-ROS formation, stability, and biological impacts are jointlygoverned by precursor identity, oxidant type, and VOC interactions,providing new insights into the oxidative potential of mixed biogenic–anthropogenicSOA.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2378–2386"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950648","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 Lower-Cost, Community-Based Platform for Monitoring Ambient Concentrations of Hazardous Air Pollutants 低成本、基于社区的环境有害空气污染物浓度监测平台

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-19 DOI: 10.1021/acsestair.6c00225

Emilio Molina Rueda, Alex Adame, Marie J. Andales, Stephanie Coates, P. Grace Tee Lewis, Christian L’Orange, Daniel Peters, Amy Sullivan, Lauren E. Padilla, Ellison Carter, John Volckens

{"title":"A Lower-Cost, Community-Based Platform for Monitoring Ambient Concentrations of Hazardous Air Pollutants","authors":"Emilio Molina Rueda, Alex Adame, Marie J. Andales, Stephanie Coates, P. Grace Tee Lewis, Christian L’Orange, Daniel Peters, Amy Sullivan, Lauren E. Padilla, Ellison Carter, John Volckens","doi":"10.1021/acsestair.6c00225","DOIUrl":"https://doi.org/10.1021/acsestair.6c00225","url":null,"abstract":"Exposureto hazardous air pollutants (HAPs) is associated withan elevated cancer risk, immune system damage, respiratory and reproductiveeffects, and other adverse health outcomes. Regulatory HAP monitoringis costly, spatially limited, and vulnerable to power outages andextreme weather, which often coincide with periods when monitoringis most needed. This work describes the development of a lower-cost,battery-powered, and community-based sampling platform for HAPs. Thesampler supports reliable measurements by recording key quality assurance/controlparameters including time, location, battery power, sample flow rate,temperature, humidity, and pressure. We partnered with and trainedcommunity volunteers to deploy the platform for ambient formaldehydesampling following the EPA Method TO-11A in Houston, Texas. Over 6weeks, 28 fully validated samples were collected, with formaldehydeconcentrations ranging from 1.27 to 7.30 ppb, consistent with concentrationsreported by nearby regulatory monitors. Noncancer effects are unlikelyat the concentrations and sampling durations observed, although contributionsto cancer risk are non-negligible. With minor technological improvementsand refined training and communication protocols, this platform showspromise for generating reliable, community-gathered HAP data withgreater spatial coverage and lower cost than established monitoringapproaches, particularly in communities underserved by existing regulatorynetworks.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2447–2454"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950731","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

Real-Time Detection of Airborne Pathogens: Science Fiction or Imminent Reality? 空气传播病原体的实时检测：科幻小说还是迫在眉睫的现实？

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-14 DOI: 10.1021/acsestair.6c00201

Henry Oswin, Lidia Morawska

{"title":"Real-Time Detection of Airborne Pathogens: Science Fiction or Imminent Reality?","authors":"Henry Oswin, Lidia Morawska","doi":"10.1021/acsestair.6c00201","DOIUrl":"https://doi.org/10.1021/acsestair.6c00201","url":null,"abstract":"A device capable of reporting the airborne pathogen concentrationwithin an indoor space in real time may sound fictional, but suchdevices have recently become a major research focus for aerobiologistsacross the world. Here, we aim to discuss the recent progress madetoward the development of real-time airborne pathogen detection, attemptingto answer the question of whether such devices could soon become apart of our day-to-day reality. After reviewing several recent publicationsthat come close to the actual development of real-time airborne pathogendetection, we concluded that, while there remain significant technologicaland logistical hurdles to the implementation of this technology, itis technically feasible and could indeed be an imminent reality. However,upon consideration of practical limitations to how the devices couldbe used, our perspective is that the development of these devicesshould not be a focus of aerobiology research. The inability of thedevices to respond to emerging pathogens, the cost of the devices,and the limitations to their functionality imposed by the complexityof indoor air flows mean that even if real-time airborne pathogendetection emerges beyond the realms of science fiction, it is onlywithin limited scenarios that this significant technological leapwill offer any practical benefit.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2197–2203"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950700","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

Wildfire Smoke beyond PM2.5: Distinct Chemical Mixtures and Hazard Profiles PM2.5以外的野火烟雾：不同的化学混合物和危害概况

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-10 DOI: 10.1021/acsestair.6c00092

Eric S. Coker, Aline Maybank, Young Jae Lim, Liddy Boland, Inumidun Oyebode, Elizabeth Z. Lin, Jieqiong Zhou, Scott Weichenthal, Krystal J. Godri Pollitt

{"title":"Wildfire Smoke beyond PM2.5: Distinct Chemical Mixtures and Hazard Profiles","authors":"Eric S. Coker, Aline Maybank, Young Jae Lim, Liddy Boland, Inumidun Oyebode, Elizabeth Z. Lin, Jieqiong Zhou, Scott Weichenthal, Krystal J. Godri Pollitt","doi":"10.1021/acsestair.6c00092","DOIUrl":"https://doi.org/10.1021/acsestair.6c00092","url":null,"abstract":"Despite growing concernabout wildfire smoke (WFS) exposure, researchhas largely focused on fine particle (PM2.5) mass ratherthan the complex airborne chemical mixtures that may pose distincthealth risks. From March to September 2024, passive air samplers intwo British Columbia communities collected chemical profiles before,during, and after WFS episodes. Gas chromatography high-resolutionmass spectrometry (GC-HRMS) characterized WFS using targeted and nontargetedapproaches. Targeted analysis quantified the concentrations of 35volatile and semivolatile organic compounds (VOCs/SVOCs), while nontargetedanalysis (NTA) detected 294 chemicals. Cluster analysis of targetedcompounds identified four chemical profiles: two representing site-specificurban background compounds and two enriched with combustion byproducts,including polycyclic aromatic hydrocarbons (PAHs), during episodicWFS. Hierarchical clustering of the NTA chemicals identified mixturescorresponding to distinct hazard profiles of regionally and locallytransported WFS from urban background chemical mixtures. Chemicalmixtures of regionally transported and locally transported smoke exhibitedenrichment patterns of compounds with known developmental, endocrine-disruption,and mutagenic-genotoxic hazards. These findings demonstrate that WFSforms complex, yet reproducible, multipollutant mixtures beyond PM2.5 and emphasize the need to evaluate long-term chemical exposuresand their potential contribution to chronic health risks.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2254–2269"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950863","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