Aerosol Science and Technology最新文献

Dust resuspension from the splash of a falling powder: A numerical aerodynamic simulation of a pellet falling onto a powder monolayer.

IF 2.8 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2025-01-01 DOI: 10.1080/02786826.2024.2417976

Leonid A Turkevich, Hongyu Chen, Milind A Jog

{"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":"https://doi.org/10.1080/02786826.2024.2417976","url":null,"abstract":"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 via 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.","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}

引用次数: 0

Nanofibrous filters: A promising solution for the efficient capture of polydisperse viral aerosols.

IF 2.8 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2025-01-01 Epub Date: 2024-11-18 DOI: 10.1080/02786826.2024.2421392

Aleksandr Fadeev, Kevin Crown, Sean Kinahan, Gabriel Lucero, Yury Salkovskiy

{"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":"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.","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}

引用次数: 0

Influence of relative humidity and aging on the optical properties of organic aerosols from burning African biomass fuels.

IF 2.8 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-10-11 eCollection Date: 2025-01-01 DOI: 10.1080/02786826.2024.2412652

Megan M McRee, Vaios Moschos, Marc N Fiddler, Dario Massabò, Jason D Surratt, Solomon Bililign

{"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":"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.","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}

引用次数: 0

Eulerian–Lagrangian CFD-microphysics modeling of aircraft-emitted aerosol formation at ground-level 地面飞机排放气溶胶形成的欧拉-拉格朗日 CFD 微物理模型

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-09-12 DOI: 10.1080/02786826.2024.2395940

Sébastien Cantin, Mohamed Chouak, François Garnier

引用次数: 0

A convertible condensation particle counter using alcohol or water as the working fluid 使用酒精或水作为工作液体的可转换冷凝粒子计数器

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-09-03 DOI: 10.1080/02786826.2024.2395939

Yiran Li, Xiaotong Chen, Jin Wu, Qiang Zhang, Zhenzhong Zhang, Jiming Hao, Jingkun Jiang

引用次数: 0

A comparative assessment of black carbon emissions during heating 17 commercial cooking oils 17 种商用食用油加热过程中黑碳排放的比较评估

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-09-03 DOI: 10.1080/02786826.2024.2394599

Mostafa Salmanimojaveri, Motahareh Naseri, Tomiris Madiyarova, Nadezhda Ushakova, Karina Yessengaziyeva, Gulnur Sultan, Enoch Adotey, Gulnaz Zhemeney, Seyed Morteza Zamir, Ali Darvishi Omrani, Farzaneh Jafarigol, Sumit Sankhyan, Shelly Miller, Lance Wallace, Dhawal Shah, Mehdi Amouei Torkmahalleh

引用次数: 0

Advancing nasal formulation characterization: Considerations toward a robust and precise method to determine the mass fraction below 10 μm in nasal products 推进鼻腔制剂表征：考虑采用稳健而精确的方法来确定鼻腔产品中低于 10 μm 的质量分数

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-09-03 DOI: 10.1080/02786826.2024.2394593

Niklas Baltz, Jan Olof Svensson, Marcus Skogevall, Ann Ohlsson, Mårten Svensson, Regina Scherließ

引用次数: 0

A numerical study on airflow and particle transport characteristics of subjects with cement dust exposure 关于接触水泥粉尘的受试者的气流和颗粒传输特性的数值研究

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-09-03 DOI: 10.1080/02786826.2024.2393829

Jimin Hwang, Woo Jin Kim, Kum Ju Chae, Gong Yong Jin, Chang Hyun Lee, Xinguang Cui, Sanghun Choi

引用次数: 0

A novel approach to resuspend particles of controlled morphologies in a 3D printed wind tunnel 在 3D 打印风洞中重新悬浮形态可控颗粒的新方法

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-08-29 DOI: 10.1080/02786826.2024.2390669

Edward Neal, Lukesh K. Mahato, Elin Butler, Richard J. Thomas, Maurice D. Walker, Jack C. Vincent, Simon T. Parker, Virginia E. Foot, Emily S. Kruger, Benjamin Higgins, William Sellors, Jonathan P. Reid

引用次数: 0

Performance evaluation of the national air quality testing services V2000 Condensation Particle Counter 国家空气质量检测服务 V2000 冷凝粒子计数器的性能评估

IF 5.2 4区环境科学与生态学

Aerosol Science and Technology Pub Date : 2024-08-23 DOI: 10.1080/02786826.2024.2386109

D. Gounaris, S. Bezantakos, D. Booker, D. R. Booker, G. Biskos

引用次数: 0