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306 results on '"Bolzacchini, Ezio"'

3. On the Chemical Composition and Hygroscopicity of Aerosols Deposited on the Insulators of Italian Power Lines

Author

Gini, Irene, primary, Balzarini, Alessandra, additional, Pirovano, Guido, additional, Toppetti, Anna Maria, additional, Fialdini, Lucio, additional, Omodeo, Paolo, additional, Pirovano, Giovanni, additional, Marzinotto, Massimo, additional, Mancini, Alessandro, additional, Losi, Niccolò, additional, Cefalì, Amedeo Manuel, additional, Doldi, Andrea, additional, Bolzacchini, Ezio, additional, and Ferrero, Luca, additional

Published
2023
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4. Anthropic Settlements' Impact on the Light-Absorbing Aerosol Concentrations and Heating Rate in the Arctic.

Author

Losi, Niccolò, Markuszewski, Piotr, Rigler, Martin, Gregorič, Asta, Močnik, Griša, Drozdowska, Violetta, Makuch, Przemysław, Zielinski, Tymon, Pakszys, Paulina, Kitowska, Małgorzata, Cefalì, Amedeo Manuel, Gini, Irene, Doldi, Andrea, Cerri, Sofia, Maroni, Pietro, Bolzacchini, Ezio, and Ferrero, Luca

Subjects
AEROSOLS, HUMAN settlements, SEA ice, RADIATIVE forcing, ARCHIPELAGOES, ATMOSPHERE
Abstract

Light-absorbing aerosols (LAA) impact the atmosphere by heating it. Their effect in the Arctic was investigated during two summer Arctic oceanographic campaigns (2018 and 2019) around the Svalbard Archipelago in order to unravel the differences between the Arctic background and the local anthropic settlements. Therefore, the LAA heating rate (HR) was experimentally determined. Both the chemical composition and high-resolution measurements highlighted substantial differences between the Arctic Ocean background (average eBC concentration of 11.7 ± 0.1 ng/m3) and the human settlements, among which the most impacting appeared to be Tromsø and Isfjorden (mean eBC of 99.4 ± 3.1 ng/m3). Consequently, the HR in Isfjorden (8.2 × 10−3 ± 0.3 × 10−3 K/day) was one order of magnitude higher than in the pristine background conditions (0.8 × 10−3 ± 0.9 × 10−5 K/day). Therefore, we conclude that the direct climate impact of local LAA sources on the Arctic atmosphere is not negligible and may rise in the future due to ice retreat and enhanced marine traffic. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Airborne microplastics over the Baltic: the role of sea-spray emission

Author

Ferrero, Luca, Scibetta, Lorenzo, Markuszewski, Piotr, Mazurkiewicz, Mikolaj, Drozdowska, Violetta, Makuch, Przemysław, Jutrzenka-Trzebiatowska, Patrycja, Zaleska-Medynska, Adriana, Andò, Sergio, Saliu, Francesco, Nilsson, Douglas E., and Bolzacchini, Ezio

Subjects
atmosphere, sea spray, microplastic
Abstract

The concentrations of both atmospheric and marine MPs were measured over the Baltic along a research cruise that started in the Gdansk harbour, till the Gotland Island, and during the way back. A "Deposition box" was used to collect airborne MPs. Marine MPs concentrations were investigated during the cruise using a dedicated HydroBios microplastic 300 µm mesh net. MPs images were recorded both using optical camera Leica ICC50W installed on a dedicated Leica DM750P microscope allowing the quantification of microparticle length and width. Results showed airborne microplastics average concentrations higher in the Gdansk harbour (161±75 m-3) compared to the open Baltic Sea and to the Gotland Island (24±9 and 45±20 m-3). These latter values are closer to the ones measured in the sea (79±18 m-3). The MPs composition was investigated using µ-Raman (for the airborne ones) and FTIR (for marine ones after dissolution of organic matter via H2O2); similar results (e.g. polyethylene, polyethylene terephthalates, polyurethane, polystyrene) were found in the two environmental compartments. Airborne and marine MPs were characterised by similar colours: blue/black, transparent and red fibres. Moreover, airborne and marine MPs appeared correlated (R2=0.89) when considering the simultaneous available measurements and they were characterised by the same average width (17±2 and 18±5 µm, respectively) but different length (427±59 and 2060±1970 µm) suggesting that in case of sea emission of MPs only the shorter ones can remain suspended in the atmosphere. The atmospheric MPs' equivalent aerodynamic diameter was calculated (28±3 µm) showing the capability of atmospheric MPs to remain suspended in the air once emitted from the sea. The estimated MPs sea emission fluxes of MPs volume (4-18*106 µm3 m-2 s-1 range) showed the contemporary presence of atmospheric transport together with a continuous emission from the sea. Also see: https://micro2022.sciencesconf.org/427347/document, In MICRO 2022, Online Atlas Edition: Plastic Pollution from MACRO to nano

Published
2022
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13. Adverse biological effects of Milan urban PM looking for suitable molecular markers of exposure

Author

Mantecca Paride, Gualtieri Maurizio, Longhin Eleonora, Bestetti Giuseppina, Palestini Paola, Bolzacchini Ezio, and Camatini Marina

Subjects
particulate matter, marker of toxicity, in vitro, in vivo, Chemical engineering, TP155-156, Chemical industries, HD9650-9663
Abstract

The results presented summarise the ones obtained in the coordinated research project Tosca, which extensively analysed the impact of Milan urban PM on human health. The molecular markers of exposure and effects of seasonally and size-fractionated PMs (summer and winter PM10, PM2.5) were investigated in in vitro (human lung cell lines) and in vivo (mice) systems. The results obtained by the analyses of cytotoxic, pro-inflammatory and genotoxic parameters demonstrate that the biological responses are strongly dependent upon the PM samples seasonal and dimensional variability, that ultimately reflect their chemical composition and source. In fact summer PM10, enriched in crustal elements and endotoxins, was the most cytotoxic and pro-inflammatory fraction, while fine winter PMs induced genotoxic effects and xenobiotic metabolizing enzymes (like CYP1B1) production, likely as a consequence of the higher content in combustion derived particles reach in PAHs and heavy toxic metals. These outcomes outline the need of a detailed knowledge of the PMs physico-chemical composition on a local scale, coupled with the biological hazard directly associated to PM exposure. Apparently this is the only way allowing scientists and police-makers to establish the proper relationships between the respirable PM quantity/quality and the health outcomes described by clinicians and epidemiologists.

Published
2012
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17. Chemistry of the Brake Emissions: Influence of the Test Cycle

Author

Mancini, Alessandro, primary, Tsyupa, Bozhena, additional, Pin, Sonia, additional, Bandiera, Marco, additional, Bertasi, Federico, additional, Federici, Matteo, additional, Bonfanti, Andrea, additional, Perricone, Guido, additional, Gigli, Lara, additional, and Bolzacchini, Ezio, additional

Published
2021
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20. Determination of Aethalometer multiple-scattering enhancement parameters and impact on source apportionment during the winter 2017/18 EMEP/ACTRIS/COLOSSAL campaign in Milan

Author

Bernardoni, Vera, primary, Ferrero, Luca, additional, Bolzacchini, Ezio, additional, Forello, Alice Corina, additional, Gregorič, Asta, additional, Massabò, Dario, additional, Močnik, Griša, additional, Prati, Paolo, additional, Rigler, Martin, additional, Santagostini, Luca, additional, Soldan, Francesca, additional, Valentini, Sara, additional, Valli, Gianluigi, additional, and Vecchi, Roberta, additional

Published
2021
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23. Abundance of Environmental Data vs. Low Public Interest in Climate and Ocean Issues. Where Is the Missing Link?

Author

Zielinski, Tymon, primary, Bolzacchini, Ezio, additional, Evans, Karen, additional, Ferrero, Luca, additional, Gregorczyk, Klaudia, additional, Kijewski, Tomasz, additional, Kotynska-Zielinska, Izabela, additional, Mrowiec, Patrycja, additional, Oleszczuk, Barbara, additional, Pakszys, Paulina, additional, Piechowska, Ewa, additional, Piwowarczyk, Joanna, additional, Sobieszczanski, Jan, additional, and Wichorowski, Marcin, additional

Published
2021
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27. Determination of Aethalometer multiple-scattering enhancement parameters and impact on source apportionment during the winter 2017–2018 EMEP/ACTRIS/COLOSSAL campaign in Milan

Author

Bernardoni, Vera, primary, Ferrero, Luca, additional, Bolzacchini, Ezio, additional, Forello, Alice Corina, additional, Gregorič, Asta, additional, Massabò, Dario, additional, Močnik, Griša, additional, Prati, Paolo, additional, Rigler, Martin, additional, Santagostini, Luca, additional, Soldan, Francesca, additional, Valentini, Sara, additional, Valli, Gianluigi, additional, and Vecchi, Roberta, additional

Published
2020
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31. Experimental black and brown carbon heating rate and from mid-latitudes to the Arctic along two years (2018-2019) of research cruises: the energy gradient for the Arctic Amplification

Author

Ferrero, Luca, primary, Losi, Niccolò, additional, Bigogno, Alessandra, additional, Gregoric, Asta, additional, Rigler, Martin, additional, Močnik, Griša, additional, Markuszewski, Piotr, additional, Makuch, Przemysław, additional, Pakszys, Paulina, additional, Petelski, Tomasz, additional, Zielinski, Tymon, additional, and Bolzacchini, Ezio, additional

Published
2020
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32. Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017

Author

Zielinski, Tymon, primary, Bolzacchini, Ezio, additional, Cataldi, Marco, additional, Ferrero, Luca, additional, Graßl, Sandra, additional, Hansen, Georg, additional, Mateos, David, additional, Mazzola, Mauro, additional, Neuber, Roland, additional, Pakszys, Paulina, additional, Posyniak, Michal, additional, Ritter, Christoph, additional, Severi, Mirko, additional, Sobolewski, Piotr, additional, Traversi, Rita, additional, and Velasco-Merino, Christian, additional

Published
2020
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33. The NO3 radical-mediated liquid phase of nitration of phenols with nitrogen dioxide

Author

Barletta, Barbara, Bolzacchini, Ezio, Meinardi, Simone, Orlandi, Marco, and Rindone, Bruno

Subjects
Alcohol industry -- Research, Environmental issues, Science and technology, Milano-Bicocca, University of (Italy) -- Research
Abstract

Researchers from the University of Milano-Bicocca, Italy studied the origin of nitrophenols from air and rainwater samples and discovered that the compounds are formed from the reaction of phenols with ozone and nitrogen dioxide.

Published
2000

34. Abstracts of the 6th FECS Conference 1998 Lectures

Author

Rowland, F. Sherwood, Blake, Donald R., Larsen, B. R., Lindskog, Anne, Peterson, Peter J., Williams, W. Peter, Wallington, T. J., Pilling, M. J., Carslaw, N., Creasey, D. J., Heard, D. E., Jacobs, P., Lee, J., Lewis, A. C., McQuaid, J. B., Stockwell, William R., Frank, Hartmut, Sacco, P., Cocheo, V., Lynge, E., Andersen, A., Nilsson, R., Barlow, L., Pukkala, E., Nordlinder, R., Boffetta, P., Grandjean, P., Heikkil, P., Hürte, L. G., Jakobsson, R., Lundberg, I., Moen, B., Partanen, T., Riise, T., Borowiak, A., De Saeger, E., Schnitzler, K. G., Gravenhorst, G., Jacobi, H. W., Moelders, S., Lammel, G., Busch, G., Beese, F. O., Dentener, F. J., Feichter, J., Fraedrich, K., Roelofs, G. J., Friedrich, R., Reis, S., Voehringer, F., Simpson, D., Moussiopoulos, N., Sahm, P., Tourlou, P. M., Salmons, R., Papameletiou, D., Maqueda, J. M., Suhr, Per B., Bell, W., Paton-Walsh, C., Woods, P. T., Partridge, R. H., Slemr, J., Slemr, F., Schmidbauer, N., Ravishankara, A. R., Jenkin, Michael E., de Leeuw, G., van Eijk, A. M. J., Flossmann, A. I., Wobrock, W., Mestayer, P. G., Tranchant, B., Ljungström, E., Karlsson, R., Larsen, S. E., Roemer, M., Builtjes, P. J. H., Koffi, Brigitte, Koffi, Ernest N’Dri, De Saeger, Emile, Ro-Poulsen, H., Mikkelsen, T. N., Hummelshøj, P., Hovmand, M. F., Simoneit, Bernd R. T., van der Meulen, A., Meyer, Michael B., Berndt, T., Böge, O., Stratmann, F., Cass, Glen R., Harrison, Roy M., Shi, Ji Ping, Hoffmann, T., Warscheid, B., Bandur, R., Marggraf, U., Nigge, W., Kamens, Richard, Jang, Myoseon, Strommen, Mike, Chien, Chao-Jung, Leach, Keri, Ammann, M., Kalberer, M., Arens, F., Lavanchy, V., Gâggeler, H. W., Baltensperger, U., Davies, J. A., Cox, R. A., Alonso, S. García, Pastor, R. Pérez, Argüello, Gustavo A., Willner, Helge, Berndt, T., Böge, O., Bogillo, V. I., Pokrovskiy, V. A., Kuraev, O. V., Gozhyk, P. F., Bolzacchini, E., Bruschi, M., Fantucci, P., Meinardi, S., Orlandi, M., Rindone, B., Bolzacchini, Ezio, Bohn, Birger, Rindone, Bruno, Bruschi, Maurizo, Zetzsch, Cornelius, Brussol, C., Duane, M., Larsen, B., Carlier, P., Kotzias, D., Caracena, A. Baeza, Aznar, A. Miñana, Ferradás, E. González, Christensen, C. S., Skov, H., Hummelshøj, P., Jensen, N. O., Lohse, C., Cocheo, V., Sacco, P., Chatzis, C., Cocheo, V., Sacco, P., Boaretto, C., Quaglio, F., Zaratin, L., Pagani, D., Cocheo, L., Cocheo, Vincenzo, Asnar, Agustin Minana, Baldan, Annerita, Ballesta, Pascual P., Boaretto, Caterina, Caracena, Antonia B., Ferradas, Enrique Gonzalez, Gonzalez-Flesca, Nobert, Goelen, Eddie, Hansen, Asger B., Sacco, Paolo, De Saeger, Emile, Skov, Henrik, Consonni, V., Gramatica, P., Santagostino, A., Galvani, P., Bolzacchini, E., Consonni, Viviana, Gramatica, Paola, Todeschini, Roberto, Dippel, G., Reinhardt, H., Zellner, R., Dämmer, K., Bednarek, G., Breil, M., Zellner, R., Febo, A., Allegrini, I., Giliberti, C., Perrino, C., Fogg, P. G. T., Geiger, H., Barnes, I., Becker, K. H., Maurer, T., Geyskens, F., Bormans, R., Lambrechts, M., Goelen, E., Giese, Martina, Frank, Hartmut, Glasius, M., Hornung, P., Jacobsen, J. K., Klausen, H. S., Klitgaard, K. C., Møller, C. K., Petersen, A. P. F., Petersen, L. S., Wessel, S., Hansen, T. S., Lohse, C., Boaretto, E., Heinemeier, J., Glasius, M., Di Bella, D., Lahaniati, M., Calogirou, A., Jensen, N. R., Hjorth, J., Kotzias, D., Larsen, B. R., Gonzalez-Flesca, N., Cicolella, A., Bates, M., Bastin, E., Gurbanov, M. A., Akhmedly, K. M., Balayev, V. S., Haselmann, K. F., Ketola, R., Laturnus, F., Lauritsen, F. R., Grøn, C., Herrmann, H., Ervens, B., Reese, A., Umschlag, Th., Wicktor, F., Zellner, R., Herrmann, H., Umschlag, Th., Müller, K., Bolzacchini, E., Meinardi, S., Rindone, B., Jenkin, Michael E., Hayman, Garry D., Jensen, N. O., Courtney, M., Hummelshøj, P., Christensen, C. S., Larsen, B. R., Johnson, Matthew S., Hegelund, Flemming, Nelander, Bengt, Kirchner, Frank, Klotz, B., Barnes, Ian, Sørensen, S., Becker, K. H., Etzkorn, T., Platt, U., Wirtz, K., Martín-Reviejo, M., Laturnus, Frank, Martinez, E., Cabañas, B., Aranda, A., Martín, P., Salgado, S., Rodriguez, D., Masclet, P., Jaffrezo, J. L., Hillamo, R., Mellouki, A., Le Calvé, S., Le Bras, G., Moriarty, J., O’Donnell, S., Wenger, J., Sidebottom, H., Mingarrol, M. T. Bomboi, Cosin, S., Pastor, R. Pérez, Alonso, S. García, Sanz, M. J., Bravo, I., Gonzalez, D., Pérez, M. A., Mustafaev, Islam, Mammadova, Saida, Noda, J., Hallquist, M., Langer, S., Ljungström, E., Nohara, K., Kutsuna, S., Ibusuki, T., Oehme, Michael, Kölliker, Stephan, Brombacher, Stephan, Merz, Leo, Pastor, R. Pérez, Alonso, S. García, Cabezas, A. Quejido, Peeters, J., Vereecken, L., El Yazal, J., Pfeffer, Hans-Ulrich, Breuer, Ludger, Platz, J., Nielsen, O. J., Sehested, J., Wallington, T. J., Ball, J. C., Hurley, M. D., Straccia, A. M., Schneider, W. F., Pérez-Casany, M. P., Nebot-Gil, I., Sánchez-Marín, J., Putz, E., Folberth, G., Pfister, G., Weissflog, L., Elansky, N. P., Sørensen, Søren, Barnes, Ian, Becker, K. H., Shao, M., Heiden, A. C., Kley, D., Rockel, P., Wildt, J., Silva, G. V. A., Vasconcelos, M. T., Fernandes, E. O., Santos, A. M. S., Skov, Henrik, Hansen, Asger, Løfstrøm, Per, Lorenzen, Gitte, Stabel, J. R., Wolkoff, P., Pedersen, T., Strom, A. B., Skov, Henrik, Hertel, Ole, Jensen, Finn Palmgren, Hjorth, Jens, Galle, Bosse, Wallin, Svante, Theloke, J., Libuda, H. G., Zabel, F., Touaty, Muriel, Bonsang, Bernard, Ullerstam, M., Langer, S., Ljungström, E., Wenger, John, Bonard, Amélie, Manning, Marcus, Nolan, Sinéad, O’Sullivan, Niamh, Sidebottom, Howard, Wenger, John, Collins, Eoin, Moriarty, Jennie, O’Donnell, Sinéad, Sidebottom, Howard, Wenger, John, Collins, Eoin, Moriarty, Jennie, O’Donnell, Sinéad, Sidebottom, Howard, Wenger, John, Sidebottom, Howard, Chadwick, Paul, O’Leary, Barbara, Treacy, Jack, Wolkoff, Peder, Clausen, Per A., Wilkins, Cornelius K., Hougaard, Karin S., Nielsen, Gunnar D., Zilinskis, Viktors, Jansons, Guntis, Peksens, Aigars, Lazdins, Agris, Arinci, Y. V., Erdöl, N., Ekinci, E., Okutan, H., Manlafalioglu, I., Bakeas, Evangelos B., Siskos, Panayotis A., Viras, Loizos G., Smirnioudi, Vasiliki N., Bottenheim, Jan W., Biesenthal, Thomas, Gong, Wanmin, Makar, Paul, Delmas, Véronique, Menard, Tamara, Tatry, Véronique, Moussafir, Jacques, Thomas, Dominique, Coppalle, Alexis, Ellermann, Thomas, Hertel, Ole, Skov, Henrik, Frohn, Lise, Manscher, Ole H., Friis, Jørgen, Girgzdiene, Rasa, Girgzdys, Aloyzas, Gurevich, N. A., Gårdfeldt, Katarina, Langer, Sarka, Hermans, C., Vandaele, A. C., Carleer, M., Fally, S., Colin, R., Bernath, P. F., Jenouvrier, A., Coquart, B., Mérienne, M. -F., Hertel, Ole, Frohn, Lise, Skov, Henrik, Ellermann, Thomas, Huntrieser, H., Schlager, H., Feigl, C., Kemp, Kåre, Palmgren, Finn, Kiilsholm, Sissi, Rasmussen, Alix, Sørensen, Jens Havskov, Klemm, Otto, Lange, Holger, Larsen, René Wugt, Larsen, Niels Wessel, Nicolaisen, Flemming, Sørensen, Georg Ole, Beukes, Jon Are, Larsen, Poul Bo, Jensen, Steen Solvang, Fenger, Jes, de Leeuw, Gerrit, Kunz, Gerard, Cohen, Leo, Schlünzen, Heinke, Muller, Frank, Schulz, Michael, Tamm, Susanne, Geernaert, Gary, Hertel, Ole, Pedersen, Britta, Geernaert, Lise Lotte Sørensen, Lund, Søren, Vignati, Elisabetta, Jickells, Tim, Spokes, Lucinda, Matei, C., Jinga, O. A., Jinga, D. C., Moliner, R., Braekman-Danheux, C., Fontana, A., Suelves, I., Thieman, T., Vassilev, S., Skov, Henrik, Hertel, Ole, Zlatev, Zahari, Brandt, Jørgen, Bastrup-Birk, Annemarie, Ellermann, Thomas, Frohn, Lise, Vandaele, A. C., Hermans, C., Carleer, M., Tsouli, A., Colin, R., Windsperger, Andreas M., Turi, Kristina, Dworak, Oliver, Zellweger, C., Weingartner, E., Rüttimann, R., Hofer, P., Baltensperger, U., Ziv, A., Iakovleva, E., Palmgren, F., Berkovicz, R., Skov, H., Alastuey, A., Querol, X., Chaves, A., Lopez-Soler, A., Ruiz, C., Andrees, J. M., Allegrini, I., Febo, A., Giusto, M., Angeloni, M., Di Filippo, P., D’Innocenzio, F., Lepore, L., Marconi, A., Arshinov, M. Yu., Belan, B. D., Davydov, D. K., Kovaleskii, V. K., Plotinov, A. P., Pokrovskii, E. V., Sklyadneva, T. K., Tolmachev, G. N., Arshinov, M. Yu., Belan, B. D., Sklyadneva, T. K., Behnke, Wolfgang, Elend, Manfred, Krüger, Ulrich, Zetzsch, Cornelius, Belan, B. D., Arshinov, M. Yu., Davydov, D. K., Kovalevskii, V. K., Plotnikov, A. P., Pokrovskii, E. V., Rasskazchikova, T. M., Sklyadneva, T. K., Tolmachev, G. N., Belan, B. D., Arshinov, M. Yu., Simonenkov, D. V., Tolmachev, G. N., Bilde, Merete, Aker, Pamela M., Börensen, C., Kirchner, U., Scheer, V., Vogt, R., Ellermann, T., Geernaert, L. L. S., Pryor, S. C., Barthelmie, R. J., Feilberg, Anders, Nielsen, Torben, Kamens, Richard M., Freitas, M. C., Marques, A. P., Reis, M. A., Alves, L. C., Ilyinskikh, N. N., Ilyinskikh, I. N., Ilyinskikh, E. N., Johansen, Keld, Stavnsbjerg, Peter, Gabrielsson, Pär, Bak, Flemming, Andersen, Erik, Autrup, Herman, Kamens, Richard, Jang, Myoseon, Strommen, Michael, Leach, Keri, Kirchner, U., Scheer, V., Börensen, C., Vogt, R., Igor, Komov, Svjatoslav, Galiy, Anatoliy, Burlak, Komov, I. L., Istchenko, A. A., Lourenço, M. G., MacTavish, D., Sirois, A., Masclet, Pierre, Jaffrezo, Jean Luc, van der Meulen, A., Milukaite, A., Morkunas, V., Jurgutis, P., Mikelinskiene, A., Nielsen, Torben, Feilberg, Anders, Binderup, Mona Lise, Pineda, M., Palacios, J. M., Garcia, E., Cilleruelo, C., Moliner, R., Popovitcheva, O. B., Trukhin, M. E., Persiantseva, N. M., Buriko, Yu, Starik, A. M., Demirdjian, B., Suzanne, J., Probst, T. U., Rietz, B., Alfassi, Z. B., Pokrovskiy, V. A., Zenobi, R., Bogatyr’ov, V. M., Gun’ko, V. M., Querol, X., Alastuey, A., Lopez-Soler, A., Mantilla, E., Plana, F., Artiño, B., Rauterberg-Wulff, A., Israël, G. W., Rocha, Teresa A. P., Duarte, Armando C., Röhrl, Andreas, Lammel, Gerhard, Spindler, G., Müller, K., Herrmann, H., Strommen, Michael R., Vignati, Elisabetta, de Leeuw, Gerrit, and Berkowicz, Ruwim

Published
1998
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35. Nighttime tropospheric chemistry: kinetics and product studies in the reaction of 4-alkyl- and 4-alkoxytoluenes with NO3 and gas phase

Author

Bolzacchini, Ezio, Meinardi, Simone, Orlandi, Marco, and Rindone, Bruno

Subjects
Hydrocarbons -- Environmental aspects, Air pollution -- Research, Methanol -- Environmental aspects, Ethanolamines -- Environmental aspects, Formaldehyde -- Environmental aspects, Environmental issues, Science and technology
Abstract

Researchers studied alkylbenzenes reactions with OH and with NO3. As alkylbenzenes are a key ingredient in gasoline, and chemical solvents, air pollution from this chemical is a concern. Reactions were studied at 760 Torr in a 480 L Teflon-coated 60 cm. diameter chamber. NO2 and O3 were put into the chamber to form N2O5. Then the hydrocarbon was added. From this reaction, methanol, ethanol, and formaldehyde were extracted, and their amounts recorded. The study concluded that reactions of NO3 radicals with aromatic hydrocarbons are slow relatively insignificant.

Published
1999

36. A new sampling system to study the effects of atmospheric particle matter in material decay

Author

Ivano Vassura, ELENA BERNARDI, Bolzacchini, Ezio, Casati, Marco, Ferrero, Luca, Lara Nobili, Perrone, Mariagrazia, Simona Raffo, Elisa Venturini, Vassura, Ivano, Bernardi, Elena, Bolzacchini, Ezio, Casati, Marco, Ferrero, Luca, Nobili, Lara, Perrone, Mariagrazia, Raffo, Simona, and Venturini, Elisa

Subjects
deposizione secca, Deposition Box, Particolato atmosferico, superfici surrogate, materiali, SEM/EDS
Published
2017

38. Chemical Composition of Aerosol over the Arctic Ocean from Summer ARctic EXpedition (AREX) 2011–2012 Cruises: Ions, Amines, Elemental Carbon, Organic Matter, Polycyclic Aromatic Hydrocarbons, n-Alkanes, Metals, and Rare Earth Elements

Author

Ferrero, Luca, primary, Sangiorgi, Giorgia, additional, Perrone, Maria, additional, Rizzi, Cristiana, additional, Cataldi, Marco, additional, Markuszewski, Piotr, additional, Pakszys, Paulina, additional, Makuch, Przemysław, additional, Petelski, Tomasz, additional, Becagli, Silvia, additional, Traversi, Rita, additional, Bolzacchini, Ezio, additional, and Zielinski, Tymon, additional

Published
2019
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39. Heating Rate of Light Absorbing Aerosols: Time-Resolved Measurements, the Role of Clouds, and Source Identification

Author

Ferrero, Luca, Moc?nik, Gris?a, Cogliati, Sergio, Gregoric?, Asta, Colombo, Roberto, and Bolzacchini, Ezio

Abstract

Light absorbing aerosols (LAA) absorb sunlight and heat the atmosphere. This work presents a novel methodology to experimentally quantify the heating rate (HR) induced by LAA into an atmospheric layer. Multiwavelength aerosol absorption measurements were coupled with spectral measurements of the direct, diffuse and surface reflected radiation to obtain highly time-resolved measurements of HR apportioned in the context of LAA species (black carbon, BC; brown carbon, BrC; dust), sources (fossil fuel, FF; biomass burning, BB), and as a function of cloudiness. One year of continuous and time-resolved measurements (5 min) of HR were performed in the Po Valley. We experimentally determined (1) the seasonal behavior of HR (winter 1.83 ± 0.02 K day–1; summer 1.04 ± 0.01 K day–1); (2) the daily cycle of HR (asymmetric, with higher values in the morning than in the afternoon); (3) the HR in different sky conditions (from 1.75 ± 0.03 K day–1in clear sky to 0.43 ± 0.01 K day–1in complete overcast); (4) the apportionment to different sources: HRFF(0.74 ± 0.01 K day–1) and HRBB(0.46 ± 0.01 K day–1); and (4) the HR of BrC (HRBrC: 0.15 ± 0.01 K day–1, 12.5 ± 0.6% of the total) and that of BC (HRBC: 1.05 ± 0.02 K day–1; 87.5 ± 0.6% of the total).

Published
2024
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40. Determination of Aethalometer multiple-scattering enhancement parameters and impact on source apportionment during the winter 2017-2018 EMEP/ACTRIS/COLOSSAL campaign in Milan.

Author

Bernardoni, Vera, Ferrero, Luca, Bolzacchini, Ezio, Forello, Alice Corina, Gregorič, Asta, Massabò, Dario, Močnik, Griša, Prati, Paolo, Rigler, Martin, Santagostini, Luca, Soldan, Francesca, Valentini, Sara, Valli, Gianluigi, and Vecchi, Roberta

Subjects
LIGHT sources, ATMOSPHERIC sciences, ATTENUATION coefficients, CARBON-black, POLLUTION source apportionment, WAVELENGTHS
Abstract

In the frame of the EMEP/ACTRIS/COLOSSAL campaign in Milan during winter 2018, equivalent black carbon measurements using the Aethalometer 31 (AE31), the Aethalometer 33 (AE33), and the Multi-Angle Absorption Photometer (MAAP) were carried out together with levoglucosan analyses on 12-h resolved PM2.5 samples collected in parallel. From AE31 and AE33 data, the loading-corrected aerosol attenuation coefficients (bATN) were calculated at 7 wavelengths (λs, where λ = 370, 470, 520, 590, 660, 880, 950 nm). Aerosol absorption coefficient at 637 nm (babs_MAAP) was determined by MAAP measurements. Furthermore, babs was also measured at 4 wavelengths (405, 532, 635, 780 nm) on the 12-h resolved PM2.5 samples by a polar photometer (PP_UniMI). After comparing PP_UniMI and MAAP results, we exploited PP_UniMI data to evaluate the filter multiple-scattering enhancement parameter at different wavelengths for AE31 and AE33. We obtained instrument- and wavelength-dependent multiple-scattering parameters by linear regression of the Aethalometer bATN against the babs measured by PP_UniMI. We found significant filter material, and hence instrumental, dependence of the multiple-scattering enhancement parameter with the difference up to 30 % between the AE31 and the AE33 tapes. The wavelength dependence and day/night variations were small – the difference between the smallest and largest value was up to 6 %. Data from the different instruments were used as input to the so-called "Aethalometer model" for optical source apportionment and instrument-dependence of the results was investigated. Inconsistencies among the source apportionment were found fixing the AE31 and AE33 multiple-scattering enhancement parameters to their usual values. Opposite, optimised multiple-scattering enhancement parameters led to 5 % agreement among the approaches. Also, the component-apportionment "MWAA model" was applied to the dataset. It resulted less sensitive to the instrument and the number of wavelengths, whereas significant differences in the determination of the absorption Ångström exponent for brown carbon were found (up to 22 %). [ABSTRACT FROM AUTHOR]

Published
2020
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41. The impact of cloudiness and cloud type on the atmospheric heating rate of black and brown carbon.

Author

Ferrero, Luca, Gregorič, Asta, Močnik, Griša, Rigler, Martin, Cogliati, Sergio, Barnaba, Francesca, Liberto, Luca Di, Gobbi, Gian Paolo, Losi, Niccolò, and Bolzacchini, Ezio

Abstract

We experimentally quantified the impact of cloud fraction and cloud type on the heating rates (HRs) of black and brown carbon (HRBC and HRBrC).In particular, in this work, we examine in more detail the average cloud effect (Ferrero et al., 2018) using high time-resolution measurements of aerosol absorption at multiple-wavelengths coupled with spectral measurements of the direct, diffuse and surface reflected radiation and lidar data in the Po Valley. The experimental set-up allowed a direct determination of HRBC and HRBrC in any sky condition. The highest values of total HR were found in the middle of the winter (1.43 ± 0.05 K day-1) while the lowest in spring (0.54 ± 0.02 K day-1) Overall the HRBrC accounted for 13.7 ± 0.2% of the total HR, the BrC being characterized by an AAE of 3.49 ± 0.01. Simultaneously, sky conditions were classified (from clear-sky to cloudy) in terms of fraction of sky covered by clouds (oktas) and cloud types. Cloud types were grouped as a function of altitude into the following classes: 1) low level (< 2 km) stratus, cumulus and stratocumulus; 2) middle level (2-7 km) altostratus, altocumulus; 3) high level (> 7 km) cirrus, cirrocumulus-cirrostratus. Measurements carried out in different sky conditions at high-time resolution showed a constant decrease of HR with increasing cloudiness of the atmosphere enabling us to quantify for the first time the bias (in %) in the aerosol HR introduced by improperly assuming clear-sky conditions in radiative transfer calculations. In fact, during the campaign, clear sky conditions were only present 23% of the time while the remaining time (77%) was characterized by cloudy conditions. Our results show that, by incorrectly assuming clear-sky conditions, the HR of light absorbing aerosol can be largely overestimated (by 50% in low cloudiness, oktas = 1-2), up to over 400% (in complete overcast conditions, i.e., oktas = 7-8). The impact of different cloud types on the HR compared to a clear sky condition was also investigated. Cirrus were found to have a modest impact, decreasing the HRBC and HRBrC by -1- -5%. Cumulus decreased the HRBC and HRBrC by -31 ± 12 and -26 ± 7%, respectively, while cirrocumulus-cirrostratus by -60 ± 8 and -54 ± 4%, which was comparable to the impact of altocumulus (-60 ± 6 and -46 ± 4%). A high impact on HRBC and HRBrC was found for stratocumulus (-63 ± 6 and -58 ± 4%, respectively) and altostratus (-78 ± 5 and -73 ± 4%, respectively), although the highest impact was found to be associated to stratus that suppressed the HRBC and HRBrC by -85 ± 5 and -83 ± 3%, respectively. Additionally, the cloud influence on the radiation spectrum that interacts with the absorbing aerosol was investigated. Black and brown carbon (BC and BrC) have different spectral responses (a different absorption Angstrom exponent, AAE) and our results show that the presence of clouds causes a greater decrease for the HRBC with respect to to HRBrC going clear sky to complete overcast conditions; the observed the difference is 12 ± 6%. This means that, compared to BC, BrC is more efficient in heating the surrounding atmosphere in cloudy conditions than in clear sky. Overall, this study extends the results of a previous work (Ferrero et al., 2018), highlighting the need to take into account both the role of cloudiness and of different cloud types to better estimate the HR associated to both BC and BrC, and in turn decrease the uncertainties associated to the quantification of the impact of these species on radiation and climate. [ABSTRACT FROM AUTHOR]

Published
2020
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45. Effetto della Zona a Traffico Limitato di Milano (Area C) sulla composizione chimica del PM

Author

BOLZACCHINI, EZIO, FERRERO, LUCA, PERRONE, MARIA GRAZIA, RIZZI, CRISTIANA, SANGIORGI, GIORGIA MAURA LUISA, Bolzacchini, E, Ferrero, L, Perrone, M, Rizzi, C, and Sangiorgi, G

Subjects
Composizione chimica PM, Zone a traffic limitato (ZTL), Elemental Carbon, IPA
Abstract

Il traffico veicolare è considerato una delle principali fonti di inquinamento atmosferico nelle aree urbane, tanto da indurre le autorità competenti a disporre blocchi del traffico. La città di Milano, a partire da gennaio 2012, ha istituito AREA C, un sistema di accesso a pagamento alla zona centrale della città per limitare il numero dei veicoli circolanti nell’area centrale della città e migliorarne la vivibilità. Scopo di questo studio è valutare quale effetto ha avuto l’introduzione della zona a traffico limitato (ZTL) su Idrocarburi Policiclici Aromatici (IPA), Elemental Carbon (EC), alcani lineari ed i principali ioni presenti nel PTS di Milano in e fuori Area C. Il particolato totale sospeso (PTS) utilizzato per questa ricerca è stato campionato in due siti rappresentativi dell’atmosfera urbana milanese, uno interno ad area C (via San Vittore, SV) e uno esterno ad essa (Torre Breda, Università degli studi di Milano-Bicocca, TB ), non si evidenziano differenze nelle concentrazioni. L’EC è utilizzato come marker primario della sorgente traffico. I risultati ottenuti mostrano una netta riduzione dell’EC in ZTL del 36%. Le concentrazioni di IPA nel periodo autunnale sono in media 2,56 ng/m3. I risultati mostrano che esiste una buona correlazione (R2= 0,86) per quanto riguarda la concentrazione degli IPA nei due siti TB e SV, con una diminuzione passando dal sito esterno alla ZTL a quello interno (riduzione media del 25%). Nei due siti, il modello di distribuzione degli IPA è lo stesso. Sono stati monitorati anche gli ossi-IPA, in particolare l’1,9-benz-10-antrone ed il Benzo(a)antracene-7,12- dione. Anche in questo caso si nota una diminuzione delle concentrazioni nel sito SV, all’interno della ZTL, del 19%. Gli alcani lineari sono presenti in concentrazioni che vanno da un minimo di 20 ng/m3 ad un massimo di 70 ng/m3 (somma da C20 a C32). I più abbondanti risultano gli alcani dispari, in particolare il C29, con un’abbondanza pari al 15% rispetto al totale degli alcani analizzati, seguito dal C27 (11%), dal C31 (11%) e dal C25 (9%); anche in questo caso si nota una riduzione all'interno della ZTL del 14 %. Non si notano significative variazioni delle concentrazioni dei principali ioni: ammonio, nitrato, solfato. In conclusione le concentrazioni di PTS, non variano significativamente tra i due siti selezionati, al contrario cambia la qualità del PTS. Provvedimenti come le ZTL possono essere utili strumenti per ridurre le concentrazioni del componenti del PM che provocano effetti sulla salute.

Published
2016

46. Green chemistry with ozone

Author

Attina, Rocco, Bolzacchini, Ezio, Orlandi, Marco, and Rindone, Bruno

Subjects
Hydrocarbons -- Biodegradation, Biodegradation -- Methods, Green technology -- Methods, Oxidizing agents -- Usage, Oxidation-reduction reaction -- Methods, Business, Chemicals, plastics and rubber industries, Chemistry, Engineering and manufacturing industries
Abstract

A technique is presented to oxidize cyclic hydrocarbons to alcohols, carboxylic acids, and ketones without producing undesirable wastes or byproducts. The technique uses tertiary alkyl hydroperoxides catalyzed by dichlorotris(2-pyridylmethyl)amine, iron(III), and an acetate bridged (mu-oxo) di-iron complex.

Published
2000

48. Vertical profiles of aerosol and black carbon in the Arctic: a seasonal phenomenology along 2 years (2011–2012) of field campaigns

Author

Ferrero, Luca, primary, Cappelletti, David, additional, Busetto, Maurizio, additional, Mazzola, Mauro, additional, Lupi, Angelo, additional, Lanconelli, Christian, additional, Becagli, Silvia, additional, Traversi, Rita, additional, Caiazzo, Laura, additional, Giardi, Fabio, additional, Moroni, Beatrice, additional, Crocchianti, Stefano, additional, Fierz, Martin, additional, Močnik, Griša, additional, Sangiorgi, Giorgia, additional, Perrone, Maria G., additional, Maturilli, Marion, additional, Vitale, Vito, additional, Udisti, Roberto, additional, and Bolzacchini, Ezio, additional

Published
2016
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