10:45am - 11:00amFR1-3: 1
Latest results on oxidative potential concentrations and drivers in western and more polluted eastern Europe, China and India
Andre Prevot
Paul Scherrer Institute, Switzerland
Oxidative potential was measured with chemical composition in mulitiple cities in western and Eastern Europe, China, and India. The main drivers of oxidative potential in the different regions and seasons will be discussed taking into account measurements of DTT and ascorbic acid in conjuncition with organic aerosol characterization, elemental composition anaylysis and source apportionment.
11:00am - 11:15amFR1-3: 2
Exploring Oxidative Potential of PM Variability for European Regulations
Cécile Tassel1,2, Jean-Luc Jaffrezo1, Pamela Dominutti1, Kaspar R. Daellenbach3, Sophie Darfeuil1, Rhabira Elazzouzi1, Paolo Laj1,4, Anouk Marsal1, Takoua Mhadhbi1, Vy Dinh Ngoc Thuy1, Céline Voiron1, Stephan Houdier1, Andrés Alastuey5, Barbara D'Anna6, Nicolas Marchand6, Sébastien Conil7, Valérie Gros8, Marloes F. van Os9, Imre Salma10, Nikolaos Mihalopoulos11,12, Griša Močnik13, Katja Džepina3,13, Katarzyna Styszko14, Christoph Hüglin15, Xavier Querol5, André S. H. Prévôt3, Olivier Favez16,17, Valérie Siroux2, Gaëlle Uzu1
1Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000 Grenoble, France; 2University Grenoble Alpes, Inserm U 1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to the Development and Respiratory Health, Institute for Advanced Biosciences, 38000 Grenoble, France; 3PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland; 4Institute for Atmospheric and Earth System Research/Physics, University of Helsinki, Helsinki, Finland; 5Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; 6Aix Marseille Univ, CNRS, LCE, Marseille, France; 7ANDRA, DISTEC/EES Observatoire Pérenne de l’Environnement, 55290 Bure, France; 8LSCE, Laboratoire des Sciences du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Orme des Merisiers, 91191 Gif sur Yvette, France; 9TNO, Environmental Modelling Sensing & Analysis, Energy & Material Transitions, Princetonlaan 8, 3584 CB Utrecht, The Netherlands; 10Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary; 11National Observatory of Athens, Institute of Environmental Research and Sustainable Development, Athens, Greece; 12ECPL, Department of Chemistry, University of Crete, Heraklion, Greece; 13University of Nova Gorica, Centre for Atmospheric Research (CRA), Ajdovščina 5270, Slovenia; 14Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland; 15Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland; 16Institut National de l’Environnement Industriel et des Risques (Ineris), Verneuil-en-Halatte, France; 17Laboratoire Central de Surveillance de la Qualité de l’Air (LCSQA), 60550 Verneuil-en-Halatte, France
The oxidative potential of PM [capacity of PM to oxidize the lungs] is attracting growing interest in research into PM health impacts. OP appears to be a relevant indicator, as it allows to provide information about the intrinsic reactivity of particles and their possible risk for health. In this work, a large database of homogeneous OP measurements throughout Europe has been used to assess its spatial variability and to distinguish several types of environments according to their oxidative burden. These observations then fuel the discussion on the integration of OP into European regulations, using various OP exposure scenarios.
11:15am - 11:30amFR1-3: 3
Oxidative Potential of Mineral Dust: Comparative Analysis of Water-Soluble and Total Fractions Under Various Aging Processes and OP Assays
Carolina Molina1, Andrea Baccarini2, Kalliopi Violaki2, Papoulis Dimitris3, Carlos Pérez4, Christos Kaltsonoudis1, Katerina Seitanidi1, Spyros Pandis1,5, Athanasios Nenes1,2
1Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology Hellas (FORTH), Patras, 26504, Greece; 2Laboratory of Atmospheric Processes and their Impacts (LAPI), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland.; 3Department of Geology, University of Patras, Patras, 26504, Greece; 4ICREA, Catalan Institution for Research and Advanced Studies, Barcelona, 08010, Spain; 5Department of Chemical Engineering, University of Patras, Patras, 26504, Greece
In this work, mineral dust was aerosolized into an atmospheric simulation chamber and oxidized with HONO, SO2 and O3, then the OP of mineral dust was estimated with different assays (DTT, AA and H2O2eq) for the total and soluble fraction. Experiments were also run for bulk samples for controlled pH changed.
11:30am - 11:45amFR1-3: 4
A meta-analysis on the short-term effects of PM oxidative potential on mortality
Vanessa Nogueira dos Santos1,2, Anouk Marsal3, Gaëlle Uzu3, Karine Supernant4, Cecile Tassel3,4, Valérie Siroux4, Joan Ballester1,2, Roy M. Harrison5, Gerard Hoek6, Xavier Querol7, Tuukka Petäjä8, Ioar Rivas1,2,7, Xavier Basagaña1,2
1Barcelona Institute for Global Health, Spain; 2Universitat Pompeu Fabra (UPF), Barcelona, Spain; 3Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000 Grenoble, France; 4University Grenoble Alpes, Inserm U 1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to the Development and Respiratory Health, Institute for Advanced Biosciences, 38000 Grenoble, France; 5Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences University of Birmingham, Edgbaston, Birmingham, United Kingdom; 6Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands; 7Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain; 8Institute for Atmospheric and Earth System Research / Physics, Faculty of Science, University of Helsinki, Helsinki FI-00560, Finland
We used quasi-Poisson regression models to estimate the effects of PM2.5 and PM10 oxidative potential (OP) exposure on mortality from four European cities: Barcelona, Grenoble, Paris, and Zurich. The associations obtained were combined using random effect meta-analysis. Two OP assays were evaluated, ascorbic acid (AA) and dithiothreitol (DTT), and the results were normalized by mass and volume.
OP was associated with both increased and decreased mortality risks, depending on assay type, PM fraction, and normalization unit. More epidemiological studies are needed to elucidate the effects of OP exposure on health.
11:45am - 12:00pmFR1-3: 5
Spatial and seasonal variability of the contribution of sources to PM2.5, PM10 and their oxidative potential in different sites in the central Mediterranean.
Serena Potì1,4, Eva Merico1, Marianna Conte2, Florin Unga1, Daniela Cesari1, Adelaide Dinoi1, Anna Rita De Bartolomeo3, Antonio Pennetta1, Ermelinda Bloise1, Giuseppe Deluca1, Giuseppe Egidio De Benedetto5, Roberto Ferrara6, Enrico Bompadre6, Maria Rachele Guascito1,3, Daniele Contini1
1Institute of Atmospheric Sciences and Climate (ISAC), National Research Council of Italy, Lecce, 73100, Italy; 2Institute of Atmospheric Sciences and Climate (ISAC), National Research Council of Italy, Rome, 00133, Italy; 3Department of Environmental and Biological Sciences and Technologies (DISTEBA), University of Salento, Lecce, 73100, Italy; 4Department of Engineering for Innovation, University of Salento, Lecce, 73100, Italy,; 5Laboratory of Chemical Analysis for the Environment and Cultural Heritage, Department of Cultural Heritage, University of Salento, Lecce, 73100, Italy; 6FAI Instruments s.r.l., Roma, 00013, Italy
This work investigates spatial and seasonal variabilities of PM2.5 and PM10 concentrations, composition, and oxidative potential (OPDTTV, obtained with DTT-assay), simultaneously at 22 sites in a central Mediterranean area in south Italy. Source apportionment using PMF5 allowed to evaluate the contributions of eight sources: traffic, biomass burning (BB), nitrate, sulphate-rich, marine, crustal, carbonates/construction, and industrial (only for PM2.5). OPDTTV had relevant spatial variability only during the cold season. The use of soluble and insoluble fractions of OC and Ca in PMF5 allowed a better separation between traffic and BB sources and allowed to determined the role of local construction works.
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