Fabrice Monna, AN Marques, Rodrigue Guillon, R Losno, Sébastien Couette, Nicolas Navarro, G Dongarra, E Tamburo, D Varrica, Carmela Chateau, FO Nepomuceno (2017), Perturbation vectors to evaluate air quality using lichens and bromeliads: a Brazilian case study, Environmental Monitoring and Assessment, 189:566. DOI: https://doi.org/10.1007/s10661-017-6280-0
Yinghe Fu, Karine Desboeufs, Julie Vincent, Elisabeth Bon Nguyen, Laurent Benoit, Remi Losno, François Dulac (2017), Estimating chemical composition of atmospheric deposition fluxes from mineral insoluble particles deposition collected in the western Mediterranean region, Atmospheric Measurement Techniques, 4389. PDF
Aurélie Verney-Carron, Loryelle Sessegolo, Mandana Saheb, Nathalie Valle, Patrick Ausset, Rémi Losno, Denis Mangin, Tiziana Lombardo, Anne Chabas, Claudine Loisel (2017), Understanding the mechanisms of Si–K–Ca glass alteration using silicon isotopes, GeoChem. CosmoChem. Acta, 203>, 404-421.
Molly B Smith, Natalie M Mahowald, Samuel Albani, Aaron Perry, Remi Losno, Zihan Qu, Beatrice Marticorena, David A Ridley, Colette L Heald (2017), Sensitivity of the interannual variability of mineral aerosol simulations to meteorological forcing dataset, Atmospheric Chemistry and Physics, 17-5, 3253-3278. PDF.
Ahmed Sami Helal, Eva Mazarío, Alvaro Mayoral, Philippe Decorse, Claude Lion, Rémi Losno, Souad Ammar, Miryana Hémadi (2017), Highly efficient and selective extraction of uranium from aqueous solution by a magnetic device: succinyl-β-cyclodextrin-APTES@ maghemite nanoparticles, Environmental Science: Nano, DOI: 10.1039/C7EN00902J
Eva Mazarío, Ahmed S Helal, Jeremy Stemper, Alvaro Mayoral, Philippe Decorse, Alexandre Chevillot-Biraud, Sophie Novak, Christian Perruchot, Claude Lion, Rémi Losno, Thierry Le Gall, Souad Ammar, Jean-Michel El Hage Chahine, Miryana Hémadi, (2017), Maghemite nanoparticles bearing di (amidoxime) groups for the extraction of uranium from wastewaters, AIP Advances, 7, 5, 056702. DOI: http://dx.doi.org/10.1063/1.4973436
Camille Pasquet, Pauline Le Monier, Fabrice Monna, Christophe Durlet, Benjamin Brigaud, Rémi Losno, Carmela Chateau, Christine Laporte-Magoni, Peggy Gunkel-Grillon (2016) Impact of nickel mining in New Caledonia assessed by compositional data analysis of lichens, SpringerPlus, 5,1,5:2022. doi:10.1186/s40064-016-3681-4,
Camille Pasquet, Peggy Gunke-Grillon, Christine Laporte-Magoni, Arnaud Serres, Thomas Quiniou, François Rocca, Fabrice Monna and Remi Losno (2016), Alternative dry separation of PM10 from soils for characterization by kinetic extraction: example of New Caledonian mining soils, Environmental Science and Pollution Research, accepted for publication.
Julie Vincent, Benoit Laurent, Rémi Losno, Elisabeth Bon Nguyen, Pierre Roullet, Stéphane Sauvage, Servanne Chevaillier, Patrice Coddeville, Noura Ouboulmane, Alcide Giorgio di Sarra, Antonio Tovar-Sánchez, Damiano Sferlazzo, Ana Massanet, Sylvain Triquet, Rafael Morales Baquero, Michel Fornier, Cyril Coursier, Karine Desboeufs, François Dulac, Gilles Bergametti (2016), Variability of mineral dust deposition in the western Mediterranean basin and south-east of France, Atmospheric Chemistry and Physics, 16 (14), 8749-8766. doi:10.5194/acp-16-8749-2016, html.
Laurent, B., R. Losno, S. Chevaillier, J. Vincent, P. Roullet, E. Bon Nguyen, N. Ouboulmane1, S. Triquet, M. Fornier, P. Raimbault and G. Bergametti, An automatic collector to monitor insoluble atmospheric deposition: An application for mineral dust deposition, CHemistry and AeRosols Mediterranean EXperiments (ChArMEx) (ACP/AMT Inter-Journal SI), 2015.
Charly Massa, Fabrice Monna, Vincent Bichet, Émilie Gauthier, Rémi Losno, Hervé Richard, (2015) Inverse modeling of past lead atmospheric deposition in South Greenland, Atmospheric Environment, in press, doi:10.1016/j.atmosenv.2015.01.025.
Estelle Camizuli, Fabrice Monna, Renaud Scheifler, Philippe Amiotte-Suchet, Rémi Losno, Pauline Beis, Benjamin Bohard, Carmela Chateau, and Paul Alibert (2014), Impact of trace metals from past mining on the aquatic ecosystem: a multi-proxy approach in the Morvan (France), Environmental Research, 134, 410-419.
Aghnatios C., Remi Losno, F. Dulac (2014), A fine fraction of soil used as an aerosol analogue during the DUNE experiment: sequential solubility in water with step-by-step decreasing pH, Biogeosciences, 11, 4627-4633. Here.
Varrica D., E. Tamburo, N. Milia, E. Vallascas, V. Cortimiglia, G. De Giudici, G. Dongarrà, E. Sanna, F. Monna and Remi Losno (2014), Metals and metalloids in hair samples of children living near the abandoned mine sites of Sulcis-Inglesiente (Sardinia, Italy), Environmental Research, 134, 366-374.
Lars-Eric Heimburger, Christophe Migon, Remi Losno, Juan-Carlos Miquel, Benoit Thibodeau, Marion Stabholz, Aurelie Dufour and Nathalie Leblond, (2014), Vertical export flux of metals in the Mediterranean Sea, Deep Sea Research I, Oceanographic Research Papers, 87, 14-23.
Camizuli E., F. Monna, A. Bermond, N. Manouchehri, S. Besançon, R. Losno, F. vanOort, J. Labanowski, A. Perreira, C. Chateau and P. Alibert (2014), Impact of historical mining assessed in soils by kinetic extraction and lead isotopic ratios, Science of Total Environment, 472, 425-436.
Kahina Aït Atmane, Carine Michel, Jean-Yves Piquemal, Philippe Sautet, Patricia Beaunier, arion Giraud, Mickaël Sicard, Sophie Nowak, Rémi Losno and Guillaume Viau (2014), Control of the anisotropic shape of cobalt nanorods in the liquid phase: from experiment to theory and back, Nanoscale, 2682-2692.
Alexie Heimburger, Rémi Losno and Sylvain Triquet (2013), Solubility of iron and other trace elements over the Southern Indian Ocean, Biogeosciences, 10, 6617-6628, doi:10.5194/bg-10-6617-2013, 2013. Here.
Piraux, H. J. Hai, N.N. Serradji, P. Philippe, S. Amar, R. Losno, N.T. Ha-Duong, M. Hémadi, J.-M. El Hage Chahine (2013), Transferrin-Receptor-1 iron-Acquisition Pathway - Synthesis, Kinetics, Thermodynamics and Rapid Cellular Internalization of a Holotransferrin-Maghemite nanoparticle Construct, Biochimica et Biophysica Acta-General Subjects, 8, 4254-4264.
Delphine Yeghicheyan, Cécile Bossy, Martine Bouhnik Coz, Chantal Douchet, Guy Granier, Alexie Heimburger, Francois Lacan, Aurélie Lanzanova, Tristan CC Rousseau, Jean‐Luc Seidel, Mickaël Tharaud, Frédéric Candaudap, Jérôme Chmeleff, Christophe Cloquet, Sophie Delpoux, Marie Labatut, Rémi Losno, Catherine Pradoux, Yann Sivry, Jeroen E Sonke, A Compilation of Silicon, Rare Earth Element and Twenty‐One other Trace Element Concentrations in the Natural River Water Reference Material SLRS‐5 (NRC‐CNRC), Geostandards and Geoanalytical Research, on line, DOI: 10.1111/j.1751-908X.2013.00232.x.
Khouloud Jlassi, Ajay Singh, Dinesh K Aswal, Rémi Losno, Memia Benna-Zayani, Mohamed M Chehimi (2013), Novel, ternary clay/polypyrrole/silver hybrid materials through in-situ photopolymerization, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 439, 193-199.
Heimburger, A., R. Losno, S. Triquet and E. Bon Nguyen (2013), Atmospheric deposition fluxes of 26 elements over the Southern Indian Ocean: time series on Kerguelen and Crozet Islands, Global Biogeochemical Cycles, 27-2, 440-449, DOI: 10.1002/gbc.20043.
Heimburger, A., M. Tharaud, F. Monna, R. Losno, K. Desboeufs and E. Bon Nguyen, (2013) SLRS-5 elemental concentrations of thirty-three uncertified elements deduced from SLRS-5/SLRS-4 ratios, Geostandards and Geoanalytical Research, Volume 37, Issue 1, pages 77–85, March 2013doi: 10.1111/j.1751-908X.2012.00185.x.
PL Morton, WM Landing, A Milne, A Aguilar-Islas, A Baker, M Baskaran, C Buck, Y Gao, S Gichuki, M Hastings, M Hatta, SC Hsu, A Johansen, C Lamborg, R Losno, C Mead, K Pahnke, M Patey, A Vandermark, A Wozniak, Lauren Zamora (2013), INTERCAL: Results from the 2008 GEOTRACES aerosol intercalibration study, Limnology and Oceanography, Methods 11, 62-78.
A. Heimburger, R. Losno, S. Triquet, F. Dulac and N. Mahowald (2012), Direct measurements of atmospheric iron, cobalt and aluminium-derived dust deposition at Kerguelen Islands, Global Biogeochemical Cycles, 26, GB4016, doi:10.1029/2012GB004301.
Louedec, Karim, Pierre Auger Collaboration and Rémi Losno (2012), "Atmospheric aerosols at the Pierre Auger Observatory and environmental implications", in Special Issue "Focus Point on Interdisciplinary Science with Cosmic Rays. Guest editors: A. Bueno, L. Wiencke", The European Physical Journal Plus, 127, 8, 97, DOI: 10.1140/epjp/i2012-12097-7.
Monna, F. , Bouchaou, L. , Rambeau, C. , Losno, R. , Bruguier, O. , Dongarrà, G. , Black, S., Chateau, C. (2012), "Lichens used as monitors of atmospheric pollution around Agadir (Southwestern Morocco) - A case study predating lead-free gasoline", Water Air & Soil Pollution, Volume 223, Number 3, 1263-1274, DOI: 10.1007/s11270-011-0942-2.
A. Smirnov, A. M. Sayer, B. N. Holben, N. C. Hsu, S. M. Sakerin, A. Macke, N. B. Nelson, Y. Courcoux, T. J. Smyth, P. Croot, P. K. Quinn, J. Sciare, S. K. Gulev, S. Piketh, R. Losno, S. Kinne, and V. F. Radionov (2012), "Effect of wind speed on aerosol optical depth over remote oceans, based on data from the Maritime Aerosol Network", Atmos. Meas. Tech., 5, 377–388, 2012. www.atmos-meas-tech.net/5/377/2012/ doi:10.5194/amt-5-377-2012
Massa C., V. Bichet, E. Gauthiera, B. B. Perren, O. Mathieu, C. Petit, F. Monna, J. Giraudeau, R. Losno, H. Richard (2012), "A 2500 year record of natural and anthropogenic soil erosion in South Greenland", Quaternary Science Reviews,, 32, 119-130.
Monna F., Camizuli E., Revelli P., Biville C., Thomas C., Losno R., Scheiffler R., Bruiguier O., Baron S., Chateau C., Ploquin A., Alibert P. (2011), "Wild brown trout affected by historical mining in the Cévennes National Park, France", Environmental Science & Technology, 45, 6823–6830.
A. Smirnov, B. N. Holben , D. M. Giles, I. Slutsker, N. T. O’Neill , T. F. Eck, A. Macke , P. Croot, Y. Courcoux, S. M. Sakerin, T. J. Smyth, T. Zielinski, G. Zibordi, J. I. Goes, M. J. Harvey , P. K. Quinn, N. B. Nelson , V. F. Radionov , C. M. Duarte , R. Losno, J. Sciare , K. J. Voss, S. Kinne, N. R. Nalli, E. Joseph, K. Krishna Moorthy, D. S. Covert, S. K. Gulev, G. Milinevsky, P. Larouche , S. Belanger, E. Horne, M. Chin , L. A. Remer, R. A. Kahn , J. S. Reid, M. Schulz, C. L. Heald , J. Zhang, K. Lapina, R. G. Kleidman , J. Griesfeller, B. J. Gaitley, Q. Tan, and T. L. Diehl, (2011), "Maritime aerosol network as a component of AERONET – ﬁrst results and comparison with global aerosol models and satellite retrievals",Atmos. Meas. Tech.,4, 583–597, http://www.atmos-meas-tech.net/4/583/2011/doi:10.5194/amt-4-583-2011
do Nascimento Fernanda Souza, Losno Rémi, Colin Jean-Louis, de Mello William Zamboni, da Silva Heitor Evangelista (2011), "Atmospheric Total Suspended Particulate Trace Element Identification by XRF at Ilha Grande, State of Rio De Janeiro, Brazil", Water, air & soil pollution (ISSN 1573-2932), vol.214, n°1-4, pp. 525-538.
Thuroczy C.E., M. Boye, and R. Losno (2010), "Dissolution of cobalt and zinc from natural and anthropogenic dusts in seawater", Biogeosciences, 7,1927-1936, doi:10.5194/bg-7-1-2010. www.biogeosciences.net/7/1927/2010/
Benoit Forel, Fabrice Monna, Christophe Petit, Olivier Bruguier, Rémi Losno, Pierre Fluck, Carole Bégeot, Hervé Richard, Vincent Bichet and Carmela Chateau (2010), "Historical mining and smelting in the Vosges Mountains (France) recorded in two ombrotrophic peat bogs", Journal of Geochemical Exploration, 107(1), pp 9-20.
Arnaud Demortière, Rémi Losno, Christophe Petit and Jean-Paul Quisefit (2010), "Composition Study of CoPt Bimetallic Nanocrystals of 2 nm", Anal. Bioanal. Chem., 397(4), pp 1485-1491. Abstract.
Samia Mahouche, Nourredine Abbas, Tarik Matrab, Mireille Turmine, Elisabeth Bon Nguyen, Rémi Losno, Jean Pinson, Mohamed M. Chehimi (2010), "Uptake of copper ions by carbon fiber/polymer hybrids prepared by tandem diazonium salt chemistry and in-situ atom transfer radical polymerization", CARBON., 48, 2106-2111.
J.Y. Piquemal, R. Losno and B. Ancian (2009), "Towards 'inverse' character tables ? A one-step method for decomposing reducible representations." J. Chem. Ed., 86, N°2, 251-253. Abstract.
Natalie M. Mahowald, Sebastian Engelstaedter, Chao Luo, Andrea Sealy, Paulo Artaxo, Claudia Benitez-Nelson, Sophie Bonnet, Ying Chen, Patrick Y. Chuang, David D. Cohen, Francois Dulac, Barak Herut, Anne M. Johansen, Nilgun Kubilay, Remi Losno, Willy Maenhaut, Adina Paytan, Joseph M. Prospero, Lindsay M. Shank, Ronald L. Siefert (2009), "Atmospheric Iron Deposition: Global Distribution, Variability, and Human Perturbations", Annu. Rev. Mar. Sci., 1:X--X, doi: 10.1146/annurev.marine.010908.163727.
Sophie Veschambre, Mariella Moldovan, David Amouroux, Jesus Miguel Santamaria Ulecia, Bruno Benech, André Etchelecou, Rémi Losno, Olivier F.-X. Donard, Pauline Pinel-Raffaitin (2008), "Apports atmosphériques des éléments traces métalliques dans la vallée d¿Aspe et le tunnel du Somport (Pyrénées-Atlantiques, France):niveau de contamination et évaluation des sources d¿émissions"; "Import of atmospheric trace metal elements in the Aspe valley and Somport tunnel (Pyrénées Atlantiques, France): level of contamination and evaluation of emission sources", Poll. Atmos., 198 199, 215-234.
Natalie Mahowald, Timothy D. Jickells, Alex R. Baker, Paulo Artaxo, Claudia R. Benitez-Nelson, Gilles Bergametti, Tami C. Bond, Ying Chen, David D. Cohen, Barak Herut, Nilgun Kubilay, Remi Losno, Chao Luo, Willy Maenhaut, Kenneth A. McGee , Gregory S. Okin, Ronald L. Siefert, Seigen Tsukuda, "The global distribution of atmospheric phosphorus sources, concentrations and deposition rates and anthropogenic impacts", Global Biogeochem. Cycles, 22, GB4026, doi:101029/2008GB003240; 2008
T. Wagener, C. Guieu, R. Losno, S. Bonnet and N. Mahowald, "Revisiting atmospheric dust export to the southern hemisphere ocean: Biogeochemical implications", Global Biogeochem. Cycles, , 22, GB2006, doi:10.1029/2007GB002984. Abstract.
F. Monna, A Puertas, F Lévêque, R Losno, G Fronteau, B Marin, J Dominik, C Petit, B Forel and C Chateau, "Geochemical records of limestone façades exposed to urban atmospheric contamination as monitoring tools?", Atmos. Environ., 42, 999-1011, 2008. Abstract.
F. Monna, M. Poujol, R. Losno, J. Dominik, H. Annegarn and H. Coetzee, "Origin of atmospheric lead in Johannesburg -South Africa-", Atmos. Environ., 40 (34), 6554-6566, 2006.
G. Bartoli, C. Migon and R. Losno, "Atmospheric input of dissolved inorganic phosphorous and silicon to the coastal northwestern Mediterranean Sea: Fluxex, variability and possible impact on phytoplankton dynamics.", Deep-See Reseach Part I, 52, 2005-2016, 2005. Abstract
K.V. Desboeufs, A. Sofikitis, R. Losno, J.L. Colin and P. Ausset, "Trace metals dissolution and solubility from mineral particles", Chemosphere, 58, 195-203, 2005. Abstract
Sandrine Gombert et al., "Pollution atmosphérique par les métaux Biosurveillance des retombées", Collection ADEME - ISBN 2-86883-805-7, Aout 2005.
F. Monna, C. Petit, J.-P. Guillaumet, I. Jouffroy-Bapicot, C. Blanchot, J. Dominik, R. Losno, H. Richard, J. Lévêque, and C . Chateau, "History and Environmental Impact of Mining Activity in Celtic Aeduan Territory Recorded in a Peat Bog (Morvan, France)", Environ. Sci. & Technol., 38, 665-673, 2004.
S. Gombert, C. Raush de Traubenberg, R. Losno, S. Leblond, J.L. Colin and D. Cossa, "Biomonitoring of Element Deposition Using Mosses in the 2000 French Survey: Identifying Sources and Spatial Trends", J. Atmos. Chem., 378-2, 479-502, 2004.
S. Leblond, S. Gombert, J.L. Colin, R. Losno and C. Rausch de Traubenberg; "Biological and temporal variations of trace element concentrations in the moss species Scleropodium purum (Hedw.) Limpr.", J. Atmos. Chem., 49,107-122, 2004.
A.M. Sofikitis, J-L. Colin, K.V. Desboeufs and R. Losno, "Iron analysis in atmospheric water samples by atomic absorption spectrometry (AAS) in water-methanol", Anal. Bioanal. Chem., 378-2, 460-464, 2004. Abstract
K.V. Desboeufs, R. Losno, and J.L. Colin, "Relation between the droplet pH and the aerosol dissolution kinetic: Effect of the incorporated aerosol particles on the droplet pH during cloud process", J. Atmos. Chem., 46, 159-172, 2003. Abstract
K.V. Desboeufs, R. Losno, and J.L. Colin, "Figures of merit of pneumatic and ultrasonic sample introduction systems in inductively coupled plasma-multichannel-based emission spectrometry in ultra-clean environment", Anal. Bioanal. Chem., 375, 567-573, 2003. Abstract
S. Leblond, J.L. Colin, R. Losno and C. Rausch de Trautenberg, "Monitoring of trace element concentrations in mosses and deposition fluxes during one year in a French rural area", J. Phys. IV, France, 107, 749-752, 2003.
S. Gombert, R. Losno, S. Leblond and C. Rausch de Traubenberg, "French spatial distribution of lead (Pb) and iron (Fe) using mosses as biomonitors", J. Phys. IV France, 107, 553-556, 2003.
I. Munier, R. Lefèvre and R. Losno, "Atmospheric factors influencing the formation of neocrystallisations on low durability glass exposed to urban atmosphere", Proc. XIX Int. Congr. Glass, Edinburgh, 1-6 July 2001 Glass Technol., 43C, 114-24, 2002.
K.V. Desboeufs, R. Losno, and J.L. Colin, "Atmospheric particles dissolution process in cloud droplets", J. Aerosol Sci., 32 (S1), S273-274, 2001.
Desboeufs K.V., Losno, R. and Colin J.L., "Factors influencing aerosol solubility during cloud processes", Atmos. Environ., 35, 3529-3537, 2001
Marion T., P.E. Perros, R. Losno, E. Steiner, "Ozone production efficiency in savanna and forest areas during EXPRESSO experiment", Journal of Atmospheric Chemistry, 38, N°1, 3-30, 2001.
|2000 and before|
Monna.F, Loizeau J.L., Thomas B., Guégen C., Favarger P.Y., Losno R. and Dominik J., "Noise identification and sampling frequency determination for precise Pb isotopic measurements by quadrupole-based Inductively Coupled Plasma Mass Spectrometry", Analusis, 28, 750-757, 2000.
Desboeufs K.V., Losno R., Vimeux F. and Cholbi S., "The pH dependent dissolution of wind-transported Saharan dust", J. Geophys. Res., 104, 21287-21299 1999. Abstract.
Losno R.; "Trace Metals acting as catalysts in a marine cloud: a box model study", Physics and Chemistry of the Earth, Part B, 24 N.3, 281-286, 1999. Abstract.
Losno R., Colin J.L., Spokes L., Jickells T., Schulz M., Reberts A., Leermakers M., Meulemann C. and Bayens W.; "Non-rain deposition significantly modifies rain samples at a coastal site", Atmos. Environ., 32, 3445-3455, 1998. Abstract.
Quisefit J.P., Garivait S., Losno R. and Steiner E.; "X-Ray fluorescence spectrometry to characterise the chemical composition of ashes produced by the burning of savannah grasses", The Nucleus., 32, 135-142, 1995.
François F., W. Maenhaut, J.L. Colin, R. Losno, M. Schulz, T. Haster, L. Spokes and T. Jickells; "Intercomparison of elemental concentrations in total and size-fractionated aerosol samples collected during the Mace Head experiment, April 1991", Atmos. Environ., 27, 837-849, 1995.
B. Lim, R. Losno, T.D. Jickells and J.L. Colin; "Solubilities of Al, Pb, Cu and Zn in rain sampled in the marine environment over the North Atlantic Ocean and Mediterrean Sea", Global Biogeochemical Cycles, 8, 349-362, 1994. Abstract.
Losno R., Colin J.L., Le Bris N., Bergametti G., Jickells T. et Lim B.; "Aluminium solubility in rainwater and molten snow", J. of Atmos. Chem., 17, 29-43, 1993. Abstract.
Dulac, F., Bergametti, G., Losno, R., Remoudaki, E., Ezat, U., and Buat-Ménard, P.; "Dry deposition of mineral aerosol particles in the marine atmosphere: Significance of the large size fraction", in Precipitation Scavenging and Atmosphere-Surface Exchange, edited by: Schwartz, S. E. and Slinn, W. G. N., Hemisphere, Richland, Wa., 2, 841–854, 1992.
Losno R., Bergametti G. et Carlier P.; "Origin of the atmospheric particulate matter over the North-Sea and the Atlantic Ocean", J. of Atmos. Chem., 15, 333-352, 1992. Abstract.
Schulz M., Dannecker W., Church T., Colin J.L., Haster T., Leermakers M., Losno R., Meulemann C., and Spokes L.; "Intercomparison of rain sampling at Mace Head/Ireland", Annales Geophysicae, Suppl. II to Vol 10, 1992.
Bergametti G., Remoudaki E., Losno R., Steiner E., Chatenet B. et Buat- Ménard P.; "Source, transport and deposition of atmospheric phosphorus over the northwestern Mediterranean", J. of Atmos. Chem., 14, 501-513, 1992.
Losno R., Bergametti G., Carlier P. et Mouvier G.; "Major ions in marine rainwater with attention to sources of alkaline and acidic species", Atmos. Environ., 25A, 763-770, 1991. Abstract.
Remoudaki E., Bergametti G. et Losno R.; "On the dynamic of the atmospheric input of copper and manganese into the Western Mediterranean Sea", Atmos. Environ., 25A, 733-744, 1991.
Tedesco D., Toutain J.P., Allard P. et Losno R.; "Chemical variations in fumarolic gases at Vulcano Island (Southern Italy): seasonal and volcanic effects", J. of Volcanology and Geothermal Res., 45, 325-334, 1991.
Bergametti G., Dutot A.L., Buat-Ménard P., Losno R. and Remoudaki E.; "Seasonal variability of the elemental composition of atmospheric aerosol particles over the Northwestern Mediterranean", Tellus, 41B, 353-351, 1989.
Losno R., Bergametti G. and Buat-Ménard P.; Zinc partitioning in Mediterranean rainwater, Geophys. Res. Lett., 15, 1389-1392, 1988.
Losno R., G.Bergametti and G.Mouvier; Determination of optima conditions for atmospheric aerosols analyses by X-Ray fluorescence, Envir. Tech. Letters, 8, 77-87, 1987. DOI:10.1080/09593338709384465 Abstract
The synthesis of bi-metallic alloy nanocrystals with a well-controlled relative composition is a real challenge and requires techniques of chemical analysis with a high accuracy. A new chemical route has been used to synthesize cobalt-platinum nanocrystals of 2 nm in a wide range of relative stoichiometry. A study of the elemental composition of the nano-alloy was carried out by X-ray fluorescence spectroscopy (XRF) and energy dispersive X-ray (EDX). We have developed a set-up of XRF analysis using silicon wafer as support to determine the elemental composition with only little amount of sample. The calibration step and the measurements capabilities were described. In a composition range of 25-75 % in cobalt, the results of both analytical methods were discussed and compared in detail.
Group theory has been extensively used to study various chemical problems, such as the determination of Raman- and infrared-active vibrations or the construction of symmetry adapted linear combinations (SALC) in the linear combination of atomic orbitals (LCAO) theory. For a given molecular point group, the first step is to construct a reducible representation that will be subsequently reduced to a direct sum of the irreducible representations belonging to the relevant group. We propose here a simple method using matrix formula in Open Office or Excel Spreadsheet to reduce any representation.
Magnetic susceptibility, surface rock soiling, elemental composition and lead isotope ratios were measured in surface stone samples collected at different heights of a late 19th century building in Dijon, France. We targeted four limestone facades that differ in orientation and proximity to car traffic. It seems that zinc, copper, sulphur and cadmium are present as diffuse pollutants in urban atmosphere, at least at the scale of the building studied. In contrast, lead and arsenic exhibit point sources: automotive traffic and past coal-burning fly-ash emissions; both coherent with lead isotopic composition measurements. Parameter variations primarily result from exposition to rain washing or micro-scale runoff, and from the closeness, magnitude and origin of anthropogenic sources. Both anthropogenic particles and natural dust tend to be similarly affected by deposition/soiling and rain washing, which act dynamically as competitive processes. Examination of archival photographs suggests that soiling predominated in the past, when the air was rich in black dust, whereas equilibrium or even weathering may occur nowadays due to recent improvements or at least changes in air quality. Using - the chemical composition of building facades to provide insights into the magnitude and dispersion of urban atmospheric pollutants may not always be straightforward because of uncertainties related to the period of accumulation.Magnetic susceptibility, surface rock soiling, elemental composition and lead isotope ratios were measured in surface stone samples collected at different heights of a late 19th century building in Dijon, France. We targeted four limestone facades that differ in orientation and proximity to car traffic. It seems that zinc, copper, sulphur and cadmium are present as diffuse pollutants in urban atmosphere, at least at the scale of the building studied. In contrast, lead and arsenic exhibit point sources: automotive traffic and past coal-burning fly-ash emissions; both coherent with lead isotopic composition measurements. Parameter variations primarily result from exposition to rain washing or micro-scale runoff, and from the closeness, magnitude and origin of anthropogenic sources. Both anthropogenic particles and natural dust tend to be similarly affected by deposition/soiling and rain washing, which act dynamically as competitive processes. Examination of archival photographs suggests that soiling predominated in the past, when the air was rich in black dust, whereas equilibrium or even weathering may occur nowadays due to recent improvements or at least changes in air quality. Using - the chemical composition of building facades to provide insights into the magnitude and dispersion of urban atmospheric pollutants may not always be straightforward because of uncertainties related to the period of accumulation.
Aerosol concentrations in the southern hemisphere are largely under sampled. This study presents a chemical and physical description of dust particles collected on board research vessels in the South East Pacific (SEPS) and the Southern Ocean (SOKS).
One hundred twelve rainwater samples collected from 1986 to 2003 at the signal station of Cap Ferrat (France, NW Mediterranean coast) were analysed for phosphate and silicate contents. This samplingsite is affected by a European urban-dominated background material, with episodic Saharan dust inputs. The input of dissolved inorganic phosphorus (DIP) and dissolved inorganic silicon (DISi) was calculated. The most significant loadings of DIP and DISi were selected in order to assess their potential impact on phytoplankton dynamics, particularly in oligotrophic conditions, when surface waters are nutrient-depleted. The theoretical new production triggered by DIP and DISi inputs (NPatmo) was estimated through Redfield calculations. The maximum theoretical DIP-triggered NPatmo was up to 670mgC/m2 in October, at the end of the oligotrophic period (135mgC/m3 in the 5 m-thick surface layer). During the same period, the daily integrated primary production measured at the DYFAMED site (NW Mediterranean Sea) was on average 219 mgC/m2/d within the 0-100m depth water column, while the mean daily primary production in the 5 m-thick surface layer was 1.6 mgC/m3/d. However, high NPatmo due to high DIP inputs might be episodically limited by lower DISi inputs, which may consequently lead to episodic preferential growth of non-siliceous phytoplanktonic species.
An open flow reactor is used to simulate the dissolution process of mineral aerosol particles in atmospheric water droplets. Data on dissolution kinetic and solubility are provided for the major trace metals from two kinds of matrix: alumino-silicated and carbonaceous sample. The results emphasize that the metals contained in the carbonaceous aerosols are easier dissolved than in the alumino-silicated particles. The released concentrations are not related to the total metal composition or the origin of particles, but are directly associated with the type of liaisons whereby the metals are bound in the solid matrix. Thus, the metals coming from carbonaceous particles are adsorbed impurities or salts and hence are very soluble and with a dissolution hardly dependent on pH, whereas the metals dissolved from alumino-silicated particles are less soluble, notably the ones constitutive of the matrix network (Fe, Mn), and with a dissolution highly influenced by pH. Consequently, in the regions with an anthropogenic influence, the dissolved concentrations of metals found in the atmospheric waters are mainly governed by the elemental carbon content. Moreover, it appears that the dissolution kinetic of metals is not constant as a function of time. The dissolution rates are very rapid in the 20 first minutes of leaching and then they are stabilized to lower values in comparison to initial rates. By consequence, the total dissolved metal content is provided after the first 20 min of the droplet lifetime. For this reason, the effects of trace metals on the atmospheric aqueous chemistry and as atmospheric wet input to the marine biota are maximal for "aged" droplets.
To distinguish between Fe(II) and Fe(III) species in atmospheric water samples, we have adapted an analytical procedure based on the formation of a specific complex between Fe(II) and ferrozine (FZ) on a chromatographic column. After elution of Fe(III), the Fe(II) complex is recovered in water-methanol (4:1). This paper investigates the possibility of trace iron measurements in this complex medium by graphite furnace atomic absorption spectrometry. A simplex optimization routine was required to complete the development of the analytical method.
The effect of incorporated aerosols on the droplet pH have been investigated by dissolution experiments on the various particles types. These experiments conducted in open-flow system emphasise that the pH changes induced by aerosol solubilisation last up to 30 min, which is a typical lifetime of droplet. These pH changes are dependent upon the initial pH of the experiment, i.e. the pH of cloud condensation: the most the pH is high in the range 3-5, the most the pH variations are important, since the basic agents leached from the particles are not neutralised by the acid agents present in the aqueous phase. A relation between the neutralising capacity of aerosol (NCA) , i.e. amount of basic agents non compensated, and the pH after neutralisation has been found. Others experiments show that the NCA is related with the aerosol composition. It has been in evidence that this composition can be modified during the cloud evapocondensation, notably by the addition of sulphate on the aerosol surface. A NCA modification with cloud processing is observed when the amount of dissolved acid is superior in comparison to the neutralising capacity of aerosol, i.e when the droplet pH is inferior to a pH of compensation characteristic of aerosol type.
Conventional figures of merit such as limits of detection, signal to background ratio or repeatability, are used to determine the performance of pneumatic and ultrasonic sample introduction systems in ultra-clean environment with an axially viewed Inductively Coupled Plasma Atomic Emission Spectrometry and multichannel detection. We observed that the ultrasonic nebuliser offered a large improvement of signal intensity (10 to 133 greater) as compared to cyclone chamber coupled with a pneumatic Meinhard nebuliser. This improvement is associated with an average increase of signal to background ratio by a factor 86 and an average decrease of detection limits by a factor 6. The improvement factors generally depend on the element and for a same element on spectral lines. Typically, the observed values of detection limits in this work are lower than those published and obtained in no ultra-clean conditions. The results emphasize that the environmental conditions of cleaning and analysis are essential to avoid and control cross contamination of the samples and hence to obtain low detection limits.
An open flow reactor was developed and used to study the pH dependency of atmospheric aerosol weathering. Under ultraclean conditions, this reactor enables experiments below the saturation of hydroxy salts and over the short time span (2 hours) that is typical for weather ing by rain and cloud water. The weathering simulations show a two-step process of dissolution rates: First, the rate increases quickly during the hydration of the solid particle surface, then after a maximum, it progressively decreases. In general, there is an increase in the dissolution rate of dissolved elements as the pH is lowered. However, between pH 3.80 and 5.30, the dissolution rate for Fe and Cu depends on both H+ and OH- concentrations and exhibits a minimum as a function of pH. This minimum can be related to pHpzc of the mineral containing these elements. The affinity of minerals for H+ was also determined by correlating hydration constants and pH.
A marine cloud includes a limited number of reactive compounds. Major species are hydrogen peroxide and ozone which are activated by photochemistry and RedOx cycling with trace metals. If we put the trace metals into the reactivity scheme, catalytic cycles appear and completely drive the reactivity even at the very low concentrations found in non polluted areas. This increases the speed of the reactions involving OH, HO2 and O2- radicals. Under these conditions, the reaction of an added dissolved reactive species can be well fitted by a first order law decrease of the degraded compound. This leads to significant simplifications in a reaction mechanism which is suitable for modelling aqueous phase chemistry in unpolluted marine clouds.
Rain water sampling in marine areas was undertaken by four groups working independently at the same time at the same place. The analytical results of the samples collected exhibit large variations and the main cause of these variations is the "non rain deposition" as sea salt during the rain itself. The collected water is a mixture of rain water and variable amounts of more concentrated sea salt transported by the wind. This non rain deposition is influenced by the exposure geometry of the sampler to the wind flow. Because sample conductivity and pH were measured using exactly the same protocol each time, a quantitative model based on simple conductivity and pH measurements is proposed to compute the amount of dissolved sea salt within samples collected under marine conditions. The acid balance of the rain water appears to be not influenced by this non rain deposition. Conclusions given by this work should be taken into account to ensure the data quality of rain sampling and analysis, especially if joint comparative experiments are conducted at different sites.
Chemical processes controlling the dissolved/particulate phase distribution of crustal (Al), and non-crustal metals (Pb, Cu and Zn) appear to differ in marine precipitation sampled over the North Atlantic Ocean and Meditterranean Sea. Dissolved Al is likely to be in equilibrium with a trivalent Al salt at rainwater pH<5.1, whereas dissolved Pb, Cu and Zn concentrations are probably controlled by adsorption/desorption processes in which rainwater particulates provide surface-active sorption sites. In both processes, rainwater pH is a critical parameter. Results suggest that in marine precipitation with pHs<5, >80% of the total Pb, Cu and Zn concentrations are delivered to the surface oceans in the dissolved form. For a corresponding pH range, Al solubility varies from <5% to >60%. Over the wider observed pH range (3.5 to 6.9), the solubilities of Pb, Cu, Zn and Al are highly variable. The use of mean trace metal solubilities for the assessment of dissolved atmospheric trace metal wet deposition fluxes should be constrained by taking into account rainwater pH in future estimates in global models.
Large variations of aluminium solubilities are found in marine and rural precipitations. The results of seven field experiments are used to produce a model of the solubilization of aluminium independent of the sampling site. Large variations of solubility appear, and the pH seems to be a major factor explaining this solubility changes. Thermodynamic calculations at T= 278K suggest that, at higher pHs (>5), equilibrium with gibbsite (aAl(OH)3) or a trivalent alkaline insoluble form acts as a limiting of aluminium solubility and at lower pHs (<5), Al could be in equilibrium with a hydroxysulfate salt Al(OH)1.5(SO4)0.75.
During the ANT VII/1 cruise of the RV Polarstern from Bremerhaven (FGR) to Rio Grande do Sul (Brazil), atmospheric particulate matter was collected by bulk filtration with a time step of 36 hours. Elemental analyses were performed in order to determine atmospheric aerosol concentrations of Al, Si, P, S, K, Ca, Ti, Mn, Fe and Zn over the North-Sea, Channel, North and South Atlantic. The slight and continuous moving in latitude, associated to large variability in concentration levels and chemical composition, allows to point out the relative influence of the major sources of particulate matter: desert soil-dust in the tropical North Atlantic, anthropogenic emissions in the North Sea and Channel and biomass burning and continental biogenic activity in the tropical South Atlantic.
Rainwaters were collected in ultra clean conditions during three field experiments (two in Corsica Island and one during a North-South Atlantic transect of the 1988 "Polarstern" cruise). These rainwaters are immediatly filtered and the major ions were measured by ionic chromatography, atomic absorption and colorimetric methods.
In these marine areas, the concentrations of major ions range over one or two orders of magnitude and are generally dominated by the redissolution in rainwater of the sea salts. The non-sea salt component shows the presence of the anthropogenic nitric and sulfuric acids which are well correlated with the origin of the air masses and which lead to acidic rains (pH from 4 to 5).
High values of pH (6-7) are also observed and can be explained by the neutralization of strong acids by natural alkaline dust as calcite, which are mainly transported from the desertic areas of the African continent. A study of these variations in major ions composition in relation with 3D air mass trajectories allows to demonstrate the behaviour of these two components during African dust transports.
X‐Ray fluorescence is an useful method for quantitative analyses of aerosol assuming the thin layer hypothesis. Analytical results by this method for three standards are compared to reference values. A good agreement is obtained when the thin layer condition is met. In a second step, the range of application of this method for some elements is determined by studying thickness and grain size effects.