Journal ArticleDOI
Capacity of quartz fibers with high filtration efficiency for capturing soot aerosol particles
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TLDR
In this paper, two quartz fibrous filters with dissimilar solid volume fractions and thicknesses were investigated for their efficiency in removing soot aerosol particles from air, and the tests involve 1.5h of continuous loading of particles at three different flow rates: 4.5, 8.15 and 9.55 l/min.Abstract:
Two proposed quartz fibrous filters with dissimilar solid volume fractions and thicknesses are investigated for their efficiency in removing soot aerosol particles from air. Soot particles are sourced from a candle burning in a chamber, and the tests involve 1.5 h of continuous loading of particles at three different flow rates: 4.5, 8.15 and 9.55 l/min. The fractional efficiency, morphology and pressure drop of both clean and loaded filters are studied using a scanning mobility particle sizer, scanning electron microscope and differential pressure gauge. Both filters have relatively similar levels of efficiency 93% for particle size (100–400 nm) at the lowest flow rate. At higher flow rates, the re-entrainment process effects the filtration efficiency of both filters. At the higher flow rate of 8.15 l/min, the filter with a higher solid volume fraction and thickness shows a higher pressure drop and an efficiency level of 95%. Increasing the flow rate to 9.55 l/min helps to pass the particles with diameters larger than 100 nm through two filters. This phenomenon decreases the fractional efficiency of both filters during the loading time.read more
Citations
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Journal ArticleDOI
Candle soot: Journey from a pollutant to a functional material
Manasi R. Mulay,Aditya Chauhan,Satyanarayan Patel,Viswanath Balakrishnan,Aditi Halder,Rahul Vaish +5 more
TL;DR: In this article, the authors present a focused review on the topic of candle-soot derived nanostructures and their potential applications and discuss the current state-of-the-art.
Journal ArticleDOI
Fabrication and characterization of a novel konjac glucomannan-based air filtration aerogels strengthened by wheat straw and okara.
TL;DR: The results demonstrated that the konjac glucomannan-based aerogel had good performance on filtration, mechanical and hydrophobic properties, indicating high potential application as an air filTration material.
Journal ArticleDOI
Filtration performance and loading capacity of nano-structured composite filter media for applications with high soot concentrations
Zhaoxia Sun,Zhaoxia Sun,Zhaoxia Sun,Yun Liang,Weidong He,Weidong He,Weidong He,Fuze Jiang,Fuze Jiang,Qiang Song,Min Tang,Jing Wang,Jing Wang +12 more
TL;DR: In this article, the authors investigated the performance of fibrous filters with different structures for designing filters with long lifetime used in applications with high soot concentrations, and the results showed that the filters which have relatively low filtration efficiency against the standard compact aerosol particles yet sufficient efficiency against soot agglomerates and an open structure can be used to gain a long lifetime.
Journal ArticleDOI
Efficacy of facemasks in mitigating respiratory exposure to submicron aerosols.
TL;DR: In this paper, the authors designed a set-up to pseudo-simultaneously measure size-segregated filtration efficiency, breathing resistance, and potential usage time (tB) for 11 types of face protective equipment (FPE; four respirators; three medical; and four handmade) in the submicron range.
Journal ArticleDOI
Efficacy of facemasks in mitigating respiratory exposure to submicron aerosols
TL;DR: In this article , the authors designed a set-up to pseudo-simultaneously measure size-segregated filtration efficiency, breathing resistance, and potential usage time (tB) for 11 types of face protective equipment (FPE; four respirators; three medical; and four handmade) in the submicron range.
References
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Journal ArticleDOI
A comparative risk assessment of burden of disease and injury attributable to 67 risk factors and risk factor clusters in 21 regions, 1990-2010: a systematic analysis for the Global Burden of Disease Study 2010
Stephen S Lim,Theo Vos,Abraham D. Flaxman,Goodarz Danaei,Kenji Shibuya,Heather Adair-Rohani,Mohammad A. AlMazroa,Markus Amann,H. Ross Anderson,Kathryn G. Andrews,Martin J. Aryee,Charles Atkinson,Loraine J. Bacchus,Adil N. Bahalim,Kalpana Balakrishnan,John R. Balmes,Suzanne Barker-Collo,Amanda J Baxter,Michelle L. Bell,Jed D. Blore,Fiona M. Blyth,Carissa Bonner,Guilherme Borges,Rupert R A Bourne,Michel Boussinesq,Michael Brauer,Peter Brooks,Nigel Bruce,Bert Brunekreef,Claire Bryan-Hancock,Chiara Bucello,Rachelle Buchbinder,Fiona Bull,Richard T. Burnett,Tim Byers,Bianca Calabria,Jonathan R. Carapetis,Emily Carnahan,Zoë Chafe,Fiona J Charlson,Honglei Chen,Jian Shen Chen,Andrew T. A. Cheng,Jennifer C. Child,Aaron Cohen,K. Ellicott Colson,Benjamin C Cowie,Sarah C. Darby,Susan Darling,Adrian Davis,Louisa Degenhardt,Frank Dentener,Don C. Des Jarlais,Karen Devries,Mukesh Dherani,Eric L. Ding,E. Ray Dorsey,Tim Driscoll,Karen Edmond,S. Ali,Rebecca E. Engell,Patricia J. Erwin,Saman Fahimi,Gail Falder,Farshad Farzadfar,Alize J. Ferrari,Mariel M. Finucane,Seth Flaxman,F.G.R. Fowkes,Greg Freedman,Michael Freeman,Emmanuela Gakidou,Santu Ghosh,Edward Giovannucci,Gerhard Gmel,Kathryn Graham,Rebecca Grainger,Rebecca Grainger,Bridget F. Grant,David Gunnell,Hialy R. Gutierrez,Wayne Hall,Hans W. Hoek,Anthony Hogan,H. Dean Hosgood,Damian G Hoy,Howard Hu,Bryan Hubbell,Sally Hutchings,Sydney E. Ibeanusi,Gemma Jacklyn,Rashmi Jasrasaria,Jost B. Jonas,Haidong Kan,John A. Kanis,Nicholas J Kassebaum,Norito Kawakami,Young-Ho Khang,Shahab Khatibzadeh,Jon-Paul Khoo,Cindy Kok,Francine Laden,Ratilal Lalloo,Qing Lan,Tim Lathlean,Janet L Leasher,James Leigh,Yang Li,John K Lin,Steven E. Lipshultz,Stephanie J. London,Rafael Lozano,Yuan Lu,Joelle Mak,Reza Malekzadeh,Leslie Mallinger,Wagner Marcenes,Lyn March,Robin Marks,Randall V. Martin,Paul McGale,John J. McGrath,Sumi Mehta,Ziad A. Memish,George A. Mensah,Tony R. Merriman,Renata Micha,Renata Micha,Catherine Michaud,Vinod Mishra,Khayriyyah Mohd Hanafiah,Ali A. Mokdad,Lidia Morawska,Dariush Mozaffarian,Tasha B. Murphy,Mohsen Naghavi,Bruce Neal,Paul K. Nelson,Joan M. Nolla,Rosana E. Norman,Casey Olives,Saad B. Omer,Jessica Orchard,Richard H. Osborne,Bart Ostro,Andrew Page,Kiran Pandey,Charles D. H. Parry,Erin Passmore,Jayadeep Patra,Neil Pearce,Pamela M. Pelizzari,Max Petzold,Michael Phillips,Daniel Pope,C. Arden Pope,John Powles,Mayuree Rao,Homie Razavi,Eva Rehfuess,Jürgen Rehm,Beate Ritz,Frederick P. Rivara,Thomas Roberts,Carolyn Robinson,Jose Adolfo Rodriguez-Portales,Isabelle Romieu,Robin Room,Lisa C. Rosenfeld,Ananya Roy,Lesley Rushton,Joshua A. Salomon,Uchechukwu Sampson,Lidia Sanchez-Riera,Ella Sanman,Amir Sapkota,Soraya Seedat,Peilin Shi,Kevin D. Shield,Rupak Shivakoti,Gitanjali M Singh,David A. Sleet,Emma Smith,Kirk R. Smith,Nicolas J. C. Stapelberg,Kyle Steenland,Heidi Stöckl,Lars Jacob Stovner,Kurt Straif,Lahn Straney,George D. Thurston,Jimmy H. Tran,Rita Van Dingenen,Aaron van Donkelaar,J. Lennert Veerman,Lakshmi Vijayakumar,Robert G. Weintraub,Myrna M. Weissman,Richard A. White,Harvey Whiteford,Steven T. Wiersma,James D. Wilkinson,Hywel C Williams,Warwick Williams,Nick Wilson,Anthony D. Woolf,Paul S. F. Yip,Jan M Zielinski,Alan D. Lopez,Christopher J L Murray,Majid Ezzati +210 more
TL;DR: In this paper, the authors estimated deaths and disability-adjusted life years (DALYs; sum of years lived with disability [YLD] and years of life lost [YLL]) attributable to the independent effects of 67 risk factors and clusters of risk factors for 21 regions in 1990 and 2010.
Journal ArticleDOI
A review of atmospheric aerosol measurements
TL;DR: A review of recent developments in atmospheric aerosol measurements can be found in this article, which focuses on measurements of aerosol integral properties (total number concentration, CCN concentration, optical coefficients, etc.), aerosol physical chemical properties (density, refractive index, equilibrium water content, etc.).
Journal ArticleDOI
Ultrafine particles in cities
Prashant Kumar,Lidia Morawska,Wolfram Birmili,Pauli Paasonen,Min Hu,Markku Kulmala,Roy M. Harrison,Leslie Norford,Rex Britter +8 more
TL;DR: This article reviews some fundamental drivers of UFP emissions and dispersion, and highlights unresolved challenges, as well as recommendations to ensure sustainable urban development whilst minimising any possible adverse health impacts.
Book
Air Filtration: An Integrated Approach to the Theory and Applications of Fibrous Filters
TL;DR: In this paper, the authors present an analysis of the effect of particle capture on the performance of paper filters and real fibrous filters in terms of filtration efficiency and performance degradation.
Journal ArticleDOI
Application of nanofibers to improve the filtration efficiency of the most penetrating aerosol particles in fibrous filters
TL;DR: In this article, an experimental verification of these expectations and simultaneously checking whether this anticipated gain in the filtration efficiency is not overpaid with an excessive pressure drop was performed, and the results of the experiments confirmed that using nanofibrous filters can achieve a significant growth of filter efficiency for the most penetrating particle size (MPPS) range and the pressure drop rises moderately.