Aerosol Science and Technology最新文献

{"title":"Application and validation of a wearable monitor for assessing time- and location-resolved exposures to particulate matter in California's Central Valley.","authors":"Xiaoying Li, Jessica Tryner, Bonnie N Young, Luis Hernandez Ramirez, Mollie Phillips, Sherry WeMott, Grant Erlandson, Grace Kuiper, Daniel Dean, Nayamin Martinez, Lorena Sanpedro, Sheryl Magzamen, John Volckens","doi":"10.1080/02786826.2024.2415481","DOIUrl":"10.1080/02786826.2024.2415481","url":null,"abstract":"<p><p>Reliable assessment of personal exposure to air pollution remains a challenge due to the limitations of monitoring technology. Recent technology developments, such as reductions in the size and cost of samplers as well as incorporation of continuous sensors for location, activity, and exposure (i.e., global positioning systems [GPS], accelerometers, and low-cost pollutant sensors), have advanced our ability to assess personal exposure to air pollution. This study evaluated the upgraded Ultrasonic Personal Aerosol Sampler (UPAS v2.1 PLUS) as a tool for quantifying time-integrated indoor and personal exposure to particulate matter (PM) and black carbon (BC) among a panel of participants in California's Central Valley and exploring personal exposures in different microenvironments using time/location-resolved PM data. Three field campaigns demonstrated that filter-derived PM₁₀, PM_2.5, PM₁₀ BC, and PM_2.5 BC concentrations measured using the UPAS were linear, unbiased, and precise compared to those measured using conventional personal sampling equipment. Time-resolved PM, GPS, and light intensity data from the UPAS allowed for personal PM_2.5 exposure assessment across microenvironments. The majority of daily PM_2.5 exposure occurred inside the home. Participants with higher out-of-home PM_2.5 exposures received those exposures primarily in agricultural and in-transit environments, in accordance with their self-reported occupational exposures. This study demonstrated the UPAS v2.1 PLUS is a reliable and valid tool for characterizing indoor air pollution and personal exposures in both temporal and spatial dimensions. Its enhanced capabilities should reduce the burden of personal activity logging in the field and enable accurate and precise estimation of exposures for epidemiological and community-based research.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 10","pages":"1272-1288"},"PeriodicalIF":2.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12435455/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145074025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An affordable, water-based, community condensation particle counter.","authors":"Susanne Hering, Stavros Amanatidis, Arantza Eiguren-Fernandez, Gregory S Lewis, Steven R Spielman, David Pariseau","doi":"10.1080/02786826.2025.2506707","DOIUrl":"10.1080/02786826.2025.2506707","url":null,"abstract":"<p><p>A \"Community Condensation Particle Counter\" (cCPC) has been developed to provide an affordable monitor of airborne particle number concentrations. The cCPC is an expansion-type condensation particle counter that incorporates single particle counting to yield a direct measurement of number concentration. Particle number concentrations are derived from the detection of individual droplets exiting the cell during the expansion, combined with the pressure readings and the physical volume of the particle cell. Modeling and experiment confirm detection of particles as small as 4 nm, with >95% detection above 20 nm. For 12 days of ambient sampling two collocated cCPCs exhibit a pooled standard deviation of 3.5%. Comparison to a pair of benchtop instruments (ADI MAGIC CPCs) yields a correlation of R²=0.98 and a regression slope of 1.1. Laboratory studies at concentrations higher than 3×10⁴ cm^-3 for both sulfate and dioctyl sebacate show equally reduced response when compared to a versatile water CPC, but this was not observed in ambient aerosol sampling. Further research will be needed to resolve this discrepancy.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12448066/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145111488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cellular responses of lung cells cultured at an Air-liquid Interface are influenced by spatial nanoparticle deposition patterns in an <i>in vitro</i> aerosol exposure system.","authors":"Sripriya Nannu Shankar, Amber O'Connor, Kiran Mital, Yuetong Zhang, Alex Theodore, Amin Shirkhani, Stavros Amanatidis, Gregory S Lewis, Arantzazu-Eiguren Fernandez, Trevor B Tilly, Otmar Schmid, Tara Sabo-Attwood, Chang-Yu Wu","doi":"10.1080/02786826.2024.2442524","DOIUrl":"10.1080/02786826.2024.2442524","url":null,"abstract":"<p><p>The deposition of inhaled particles is typically highly localized in both the bronchial and alveolar region of the lung displaying spot-like, line-like and other deposition patterns. However, knowledge is very limited on how different deposition patterns may influence downstream cellular responses. In this study, the Dosimetric Aerosol <i>in Vitro</i> Inhalation Device (DAVID) was used for dose-controlled deposition of cupric oxide nanoparticles (CuONPs) in four different patterns (i.e., spot, ring, line and circle) on human alveolar A549 cells cultured at an air-liquid interface (ALI). After CuONP deposition (<15 min) and a 24 h incubation phase, cell viability, apoptotic / necrotic cell count, and gene expressions were measured. At the lowest dose of ~5 μg/cm², the line pattern resulted in the lowest viability of cells (57%), followed by the spot pattern (85%) while the ring and circle patterns exhibited >90% viability, compared to the particle free air control. At the highest dose of ~20 μg/cm², the viability reduced to 44%-60% for all patterns. Also, the gene profile was found to depend on deposition pattern. The results demonstrate that the deposition pattern is a critical parameter influencing cellular response, thus an important parameter to consider in toxicity and drug delivery studies. Furthermore, the ability of DAVID to control the delivery of aerosolized particles in various deposition patterns was demonstrated, which enables implementation of nonhomogeneous particle deposition patterns that mimic real-life human inhalation exposures in future <i>in vitro</i> toxicology studies.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 10","pages":"1198-1209"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12490821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145231390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dust resuspension from the splash of a falling powder: A numerical aerodynamic simulation of a pellet falling onto a powder monolayer.","authors":"Leonid A Turkevich, Hongyu Chen, Milind A Jog","doi":"10.1080/02786826.2024.2417976","DOIUrl":"10.1080/02786826.2024.2417976","url":null,"abstract":"<p><p>A falling powder can generate a dust cloud from its interaction with the ambient air and from its splash onto a substrate. This article reports the results of a numerical simulation study, which attempts to model this second process. We argue that the dust cloud arises from the aerodynamic resuspension of previously deposited small particles. The agglomerated falling powder is modeled as a falling pellet disk impacting a surface covered with a monolayer of previously deposited particles. The Reynolds number of the air flow in the vicinity of the impacting pellet is Re ~ 1860, so the air flow is modeled as laminar and incompressible. The dust particles are incorporated <i>via</i> a Lagrangian multiphase treatment. The sudden deceleration of the disk sheds an aerodynamic vortex, which suspends particles from the monolayer. Characteristics of the dust cloud (average and maximum height and radius) are tracked; these are conveniently summarized by following the trajectory of the dust cloud centroid. The probability of aerosolization decreases with distance from the impacted pellet. The centroid trajectory is studied as a function of dust particle size. The model is relatively insensitive to disk radius and thickness. More realistic modeling of dust clouds generated by the splash of falling powders will require a statistical analysis of aggregate size and location, as well as the inclusion of interparticle and particle-surface interactions.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 1","pages":"49-65"},"PeriodicalIF":2.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11951305/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D printed micro-cyclones with improved geometries for low-cost aerosol size separation.","authors":"Derek Goderis, Yao Xiao, Ali Alotbi, Arsh Ahtsham, J Timothy Dvonch, Andrew J Mason, Andrew P Ault","doi":"10.1080/02786826.2024.2403574","DOIUrl":"https://doi.org/10.1080/02786826.2024.2403574","url":null,"abstract":"<p><p>The impact of suspended particles on health, climate, and industrial applications is highly size-dependent. Thus, regulations are typically based on particles with diameters below a specific size, such as particulate matter less than 2.5 μm (PM_2.5). For over a century, cyclones have been employed to isolate particles below a certain diameter by removing large particles from a gas stream, but cyclones are typically relatively large, heavy, and expensive to fabricate compared to objects made with low-cost 3-dimensional (3D) printers. Herein, we present one-piece 3D-printed micro-cyclones (PM_2.5 and PM₁) to isolate particles smaller than a specific diameter. The collection efficiencies and 50% cut-off diameters (d₅₀) of multiple cyclones were evaluated with both monodisperse and polydisperse standards ranging from 0.1 to 3 μm, as well as ambient aerosol. By altering the inlet orientation relative to the micro-cyclone centerline (orthogonal, 50% offset, and fully offset), we show that shifting the inlet radially outward increased the steepness of the transmission curve resulting in a sharper cut-point. The d₅₀ also decreased below the designed for diameter, (PM₁ = 1.4, 1.0, and 0.9 μm; PM_2.5 = 3.2, 2.0, 1.9 μm), which was attributed to imperfect models, internal surface roughness, and print errors versus machining. These single piece, 3D-printed cyclones provide a cheaper (< $1), faster, and more accessible approach to manufacture micro-cyclones for use in a range of aerosol applications.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 2","pages":"238-251"},"PeriodicalIF":2.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12002565/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143961577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanofibrous filters: A promising solution for the efficient capture of polydisperse viral aerosols.","authors":"Aleksandr Fadeev, Kevin Crown, Sean Kinahan, Gabriel Lucero, Yury Salkovskiy","doi":"10.1080/02786826.2024.2421392","DOIUrl":"10.1080/02786826.2024.2421392","url":null,"abstract":"<p><p>This study investigates the effectiveness of electrospun nanofibrous filters in capturing polydisperse virus-containing aerosols and the subsequent release of viruses, in comparison with standard commercial filters used in respirators, military gas masks, and devices for airborne virus sampling. We assessed the performance of these filters in capturing and releasing polydisperse aerosols containing MS2 bacteriophage, as well as in their ability to filter monodisperse dioctyl phthalate aerosols measuring 0.185 μm and 0.3 μm in diameter. Our findings indicate that nanofibrous filters provide superior filtration efficiency for monodisperse aerosols, achieving a reduction in the concentration of penetrating aerosols by 2-3 orders of magnitude compared to their commercial counterparts. However, this enhanced efficiency is accompanied by a higher pressure drop and a lower quality factor, underscoring the need for further improvements. Additionally, our research confirms the feasibility of producing aligned nanofibers via multiple-jet needleless electrospinning, though alignment did not significantly impact filtration efficiency. Nanofibrous filters demonstrated filtration efficiency for aerosolized virus-containing particles that was comparable to or better than that of commercial filters. Notably, certain nanofibrous filters exhibited exceptionally low rates of viral aerosol capture and release, indicating a potential for virus neutralization. Moreover, filters made from water-soluble electrospun polyvinylpyrrolidone significantly outperformed those made from gelatin in terms of viral particle release, underscoring the potential of water-soluble electrospun materials in improving viral particle collection. Overall, our study highlights the significant promise of electrospun nanofibers in public health, especially in enhancing defenses against the transmission of viral aerosols.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 1","pages":"34-48"},"PeriodicalIF":2.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11845214/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143482067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occupational exposure monitoring of airborne respiratory viruses in outpatient medical clinics.","authors":"William B Vass, Amin Shirkhani, Mohammad Washeem, Sripriya Nannu Shankar, Yuetong Zhang, Tracey L Moquin, Rebeccah L Messcher, Matthew D Jansen, James R Clugston, Matthew P Walser, Yang Yang, John A Lednicky, Z Hugh Fan, Chang-Yu Wu","doi":"10.1080/02786826.2024.2403580","DOIUrl":"10.1080/02786826.2024.2403580","url":null,"abstract":"<p><p>Exposure to airborne respiratory viruses can be a health hazard in occupational settings. In this study, air sampling was conducted from January to March 2023 in two outpatient medical clinics-one primary care clinic and one clinic dedicated to the diagnosis and treatment of respiratory illnesses-for the purpose of assessing airborne respiratory virus presence. Work involved the operation of a BioSpot-VIVAS^™ as a stationary air sampler and deployment of NIOSH BC-251 bioaerosol samplers as either stationary devices or personal air samplers worn by staff members. Results were correlated with deidentified clinical data from patient testing. Samples from seven days were analyzed for SARS-CoV-2, influenza A H1N1 and H3N2 viruses, and influenza B Victoria- and Yamagata-lineage viruses, with an overall 17.5% (17/97) positivity rate. Airborne viruses predominated in particles of aerodynamic diameters from 1-4 μm and were recovered in similar quantities from both clinics. BC-251 samplers (17.4%, 15/86) and VIVAS (18.2%, 2/11) collected detectable viruses at similar rates, but more numerous BC-251 samplers provided greater insight into virus presence across clinical spaces and job categories. 60% of samples from reception areas contained detectable virus, and exposure to significantly more virus (p = 0.0028) occurred at reception desks as compared to the \"mobile\" job categories of medical providers and nurses. Overall, this study provides valuable insights into the impacts of hazard mitigation controls tailored to reducing respiratory virus exposure and highlights the need for continued diligence toward exposure risk mitigation in outpatient medical clinics.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12266680/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144658133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of relative humidity and aging on the optical properties of organic aerosols from burning African biomass fuels.","authors":"Megan M McRee, Vaios Moschos, Marc N Fiddler, Dario Massabò, Jason D Surratt, Solomon Bililign","doi":"10.1080/02786826.2024.2412652","DOIUrl":"10.1080/02786826.2024.2412652","url":null,"abstract":"<p><p>Biomass burning (BB) is a major source of atmospheric fine carbonaceous aerosols, which play a significant, yet uncertain, role in modulating the Earth's radiation balance. However, accurately representing their optical properties in climate models remains challenging due to factors such as particle size, mixing state, combustion type, chemical composition, aging processes, and relative humidity (RH). In our study, we investigated BB organic-rich aerosols generated from smoldering sub-Saharan African biomass fuels. Fuel samples were collected in Africa and aerosols generated in the laboratory. We quantified key optical parameters, including mass cross-sections for extinction (2.04 ± 0.32 - 15.5 ± 2.48 m²/g), absorption (0.04 ± 0.01-0.3 ± 0.1 m²/g), and scattering (1.9 ± 0.68-15.3 ± 5.5 m²/g). Wavelength-dependent properties were used to determine absorption and scattering Ångström exponents. The single scattering albedo of these aerosols ranged from 0.8 ± 0.03 to 1.0 ± 0.04 and we observed a wavelength-dependent behavior. Extinction emission factors were determined at a wavelength of 550 nm, with values ranging from 42 ± 5 to 293 ± 32 m²/kg. Notably, optical properties exhibited fuel-type dependence, with differences observed between hardwood samples and other fuels, such as grass and animal dung. Aging increased mass extinction and scattering cross-sections at 550 nm, while humidity had the opposite effect across all fuels. Nitrate radical oxidation, both in photo and dark aging conditions, also influenced these properties. The findings are expected to close the gap in our understanding of optical properties of BB aerosol emissions in one of the least studied regions of the world - Africa - providing information to climate and air quality models for the region.</p>","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"59 5","pages":"544-566"},"PeriodicalIF":2.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11934956/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eulerian–Lagrangian CFD-microphysics modeling of aircraft-emitted aerosol formation at ground-level","authors":"Sébastien Cantin, Mohamed Chouak, François Garnier","doi":"10.1080/02786826.2024.2395940","DOIUrl":"https://doi.org/10.1080/02786826.2024.2395940","url":null,"abstract":"Aviation-induced particulate matter directly affects the climate, the atmospheric composition at flight altitudes, and local air quality near airports. Meeting environmental regulations is a key ch...","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"232 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A convertible condensation particle counter using alcohol or water as the working fluid","authors":"Yiran Li, Xiaotong Chen, Jin Wu, Qiang Zhang, Zhenzhong Zhang, Jiming Hao, Jingkun Jiang","doi":"10.1080/02786826.2024.2395939","DOIUrl":"https://doi.org/10.1080/02786826.2024.2395939","url":null,"abstract":"Thermally diffusive laminar-flow condensation particle counters (CPCs) often utilize alcohol or water as the working fluid to condense and grow particles large enough for optical detection. Differe...","PeriodicalId":7474,"journal":{"name":"Aerosol Science and Technology","volume":"4 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}