Size-fractionated measurement of coarse black carbon particles in deposition samples |
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| Institution: | 1. Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India;2. Nalanda College of Engineering, Bihar Engineering University, Science, Technology and Technical Education Department, Government of Bihar, 803108, India;3. Department of Chemistry, Nagaland University, Zunheboto, 798627, Nagaland, India;1. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China;2. University of the Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, Beijing, 100049, China;1. Department of Cancer Prevention, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China;2. National Cancer Center/ Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China;3. Cancer Epidemiology Unit, Centro di Riferimento Oncologico di Aviano, Istituto di Ricovero e Cura a Carattere Scientifico, Aviano, Italy;4. Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon 69372, France;1. Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Calle Catedrático José Beltrán, 2, 46980, Paterna, Valencia, Spain;2. Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058, Erlangen, Germany;3. Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058, Erlangen, Germany;4. Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nuremberg, Chair of Organic Chemistry II, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany;5. Joint Institute of Advanced Materials and Processes (ZMP), Friedrich-Alexander University of Erlangen-Nuremberg, Dr.-Mack-Str. 81, D-90762, Fürth, Germany;6. Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090, Vienna, Austria;7. Department of Physics, University of Helsinki, P.O. Box 43, 00014, Helsinki, Finland;8. Department of Chemistry, University of Texas at El Paso, El Paso, TX, 79968, USA;9. PTC Therapeutics, Inc., 350 North Bernardo Avenue Mountain View, CA, 94043, USA;10. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, Tarragona, E-43007, Spain;1. Department of Materials Science and Engineering, Gachon University, Seongnam, Republic of Korea;2. IL Science Co., Ltd., IL Square, 5 Saemal-ro 5-gil, Songpa-gu, Seoul, Republic of Korea |
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| Abstract: | In a 1-year field study, particle deposition flux was measured by transparent collection plates. Particle concentration was simultaneously measured with a cascade impactor. Microscopic evaluation of deposition samples provided the discrimination of translucent (mineral or biological) and black carbon particles, i.e. soot agglomerates, fly-ash cenospheres and rubber fragments in the size range from 3 to 50 μm. The deposition samples were collected in two different sampling devices. A wind- and rain-shielded measurement was achieved in the Sigma-2 device. Dry deposition data from this device were used to calculate mass concentrations of the translucent and the black particle fraction separately, approximating particle deposition velocity by Stokes' settling velocity. In mass calculations an error up to 20% has to be considered due to assumed spherical shape and unit density for all particles. Within the limitations of these assumptions, deposition velocities of the distinguished coarse particles were calculated. The results for total particulate matter in this range are in good agreement with those from impactor measurement. The coarse black carbon fraction shows a reduced deposition velocity in comparison with translucent particles. The deviation depends on precipitation amount. Further measurements and structural investigations of black carbon particles are in preparation to verify these results. |
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