Letteratura scientifica selezionata sul tema "Traçage de pollution"
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Articoli di riviste sul tema "Traçage de pollution":
Grapin, G., e J. F. Collin. "Facteurs de la qualité sanitaire des eaux de piscines. Etude des aspects hydrauliques par application de techniques de traçage". Journal français d’hydrologie 19, n. 2 (1988): 191–202. http://dx.doi.org/10.1051/water/19881902191.
Hallet, V. "Modélisation mathématique de l'évolution, à long terme, des teneurs en nitrates dans la nappe aquifère des craies du Crétacé de Hesbaye (Belgique)". Revue des sciences de l'eau 17, n. 1 (12 aprile 2005): 3–22. http://dx.doi.org/10.7202/705520ar.
Vilas Boas, Naylor, Verena Andreatta, Francesca Martinelli e Talita Simão Luiz Araujo. "Avenida Presidente Vargas". Labor e Engenho 16 (29 dicembre 2022): e022028. http://dx.doi.org/10.20396/labore.v16i00.8671580.
Costa, Graciete Guerra da, Derick Figueiredo, Tamara Chaveco e Angélica Pereira Triani. "O uso de tecnologia em projetos de urbanismo durante a pandemia de Covid-19". Labor e Engenho 16 (3 ottobre 2022): e022009. http://dx.doi.org/10.20396/labore.v16i00.8666336.
De Paula, Gisandra Faria, Narayana Saniele Massocco e Nathália Freitas Boaventura. "Avaliação da erodibilidade de áreas degradadas na faixa de domínio da DF-250 Brasil". Labor e Engenho 17 (17 ottobre 2023): e023007. http://dx.doi.org/10.20396/labore.v17i00.8673218.
Orand, A., e M. Colon. "La fluorimétrie appliquée à la mesure du débit en milieu torrentie". Revue des sciences de l'eau 6, n. 2 (12 aprile 2005): 195–209. http://dx.doi.org/10.7202/705173ar.
Alves Martins, Maria Virgínia, Márcia Andréia Da Silva Nunes, Marcio Inacio Alves, Marco Helenio de Paula Alves Coelho, Wellen Fernanda Louzada Castelo, Lucia Maria Lorini, Denise Terroso et al. "GEOCHEMICAL NORMALIZERS APPLIED TO THE STUDY OF THE PROVENANCE OF LITHOGENIC MATERIALS DEPOSITED AT THE ENTRANCE OF A COASTAL LAGOON. A CASE STUDY IN AVEIRO LAGOON (PORTUGAL) / NORMALIZADORES GEOQUÍMICOS APLICADOS AO ESTUDO DE PROVENIÊNCIA DE MATERIAIS LITOGÉNICOS DEPOSITADOS NA ENTRADA DE UMA LAGUNA COSTEIRA. UM ESTUDO DE CASO NA LAGUNA DE AVEIRO (PORTUGAL)". Journal of Sedimentary Environments 3, n. 2 (9 giugno 2018): 74–92. http://dx.doi.org/10.12957/jse.2018.34815.
Coletti, Tomé. "Ninguém diga “desta água não beberei”: produção agropecuária e contaminação hídrica no Oeste Catarinense, Brasil". Cadernos de Saúde Pública 38, n. 4 (2022). http://dx.doi.org/10.1590/0102-311xpt165421.
Tesi sul tema "Traçage de pollution":
Estrade, Nicolas. "Discrimination et traçage isotopique des sources anthropiques du mercure dans l’environnement". Pau, 2010. http://www.theses.fr/2010PAUU3024.
This work reports the investigation of the mercury (Hg) isotopes composition in several environmental compartments and anthropogenic materials in order to use Hg isotopes to discriminate and trace anthropogenic contamination sources in the environment. First, this work summarizes results from isotopic analysis in multiple environmental matrices and reference materials. Secondly, it reports mass dependent and mass independent fractionation measured during experimental works of liquid Hg evaporation and abiotic reduction by green rust. A third part consists in showing how to use Hg isotope composition to discriminate and trace anthropogenic as well as natural sources. Hg isotope compositions measured in lichens from an urban area display significant range of mass dependent and mass independent fractionation characteristic of the geographical area that can be use to discriminate the atmospheric Hg sources (anthropogenic and atmospheric pool). Hg isotope compositions in contaminated and urban soils indicate that the isotope signature of the anthropogenic source was preserved with the time and the soils conditions. This demonstrates the potential use of Hg isotopes as tracer of anthropogenic sources. Finally, this work presents preliminary results on the Hg isotopic composition of fumes emissions of a municipal solid waste combustor located in an urban area. Isotope fractionation was found during the condensation of the fumes. The isotopic composition of the HgII fraction at the stack exhaust indicates mass dependent fractionation whereas the Hg0 fraction may be affected by mass independent fractionation giving novel insight for anthropogenic source tracing
Babey, Tristan. "Compartimentation et transfert de contaminants dans les milieux souterrains : interaction entre transport physique, réactivité chimique et activité biologique". Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S107/document.
Modelling of contaminant transfer in the subsurface classically relies on a detailed representation of transport processes (groundwater flow controlled by geological structures) coupled to chemical and biological reactivity (immobilization, degradation). Calibration of such detailed models is however often limited by the small amount of available data on the subsurface structures and characteristics. In this thesis, we develop an alternative approach of parsimonious models based on simple graphs of interconnected compartments, taken as generalized multiple interacting continua (MINC) and multiple rate mass transfer (MRMT). We show that this approach is well suited to systems where diffusion-like processes are dominant over advection, like for instance in soils or highly heterogeneous aquifers like fractured aquifers. Homogenization induced by diffusion reduces concentration gradients, speeds up mixing between chemical species and makes residence time distributions excellent proxies for reactivity. Indeed, simplified structures calibrated solely from transit time information prove to provide consistent estimations of non-linear reactivity (e.g. sorption and precipitation/dissolution). Finally, we show how these models can be applied to tracer observations and to biodegradation reactions. Two important advantages of these parsimonious approaches are their facility of development and application. They help identifying the major controls of exchanges between advective and diffusive zones or between inert and reactive zones. They are also amenable to extrapolate reactive processes at larger scale. The use of isotopic fractionation data is proposed to help discriminating between structure-induced effects and reactivity
Derrien, Morgane. "Validation de l'utilisation des stéroïdes en tant qu'outil de traçage de l'origine des contaminations fécales des eaux de surface". Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00674626.
Bothamy, Nina. "Fractionnement anthropique et naturel des isotopes stables du néodyme (Nd) dans l'environnement". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0295.
With the worldwide growing demand for various applications (new technologies, green energies, etc.), rare earth elements (REEs) are now considered as emerging pollutants. These pollutions are/will be of industrial origin (e.g. industrial wastes), of mining origin, or caused by the inappropriate storage of industrial products (e.g. neodymium (Nd) magnets fragile against corrosion). In this context, this PhD project aims to develop a new tool: the study of the mass-dependent isotopic fractionation of Nd (δNd in ‰). The goals of this work were to i) bring the maximum of information in order to help to identify and trace anthropogenic Nd in the environment, and ii) help the understanding of how plants accumulate REEs, especially the hyperaccumulator Dicranopteris linearis ferns, in order to support the studies about the phytoremediation of polluted areas. The δNd of anthropogenic materials (pure Nd synthetic solutions, Nd2Fe14B industrial magnets; δ148Nd range of 1.45 ‰, literature included) was compared to the signature of natural terrestrial rocks of the literature (δ148Nd range of 0.66 ‰). Our results show that the use together of i) the 143Nd radiogenic isotope (ε143Nd, tracer of sources), ii) the stable Nd isotopic composition of Nd (δNd, tracer of sources and processes) and, iii) the kind of stable Nd isotopic fractionation (kinetic or thermodynamic equilibrium), could allow the distinction of the natural from the anthropogenic Nd, and to trace the anthropogenic Nd in the environment. The measurement of the δNd of 5 D. linearis fern specimens, and of 3 biological standards (lichen, apple leaves and duck weed) allowed discovering that biology can fractionate the stable Nd isotopes. Extreme δ148Nd values are -0.415 ± 0.060 ‰ and -0.011 ± 0.022 ‰ (2σmean), respectively for one of the fern petiole and the duck weed. Three principal results were obtained: i) the δNd fractionation is correlated to the fractionation of the light REEs than the heavy REEs for all the studied samples (ferns, lichen, apple leaves, duck weed and all soil materials); ii) the distribution and transport of Nd (and REEs) in the different parts of ferns are correlated to those of manganese (Mn), suggesting similar transport mechanisms for REEs and Mn, for ferns but also for other plants as apple trees; iii) the degradation of clay minerals, on which REEs are mostly adsorbed in the studied soils, can induce the fractionation of stable Nd isotopes, from natural processes (e.g. biological) or anthropogenic processes (REEs mining acidic extraction)
Rabiet, Marion. "Contamination de la ressource en eau par les eaux usées dans un bassin versant Méditerranéen - Apport des éléments majeurs, traces et terres rares". Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2006. http://tel.archives-ouvertes.fr/tel-00126551.
Jean-Baptiste, Julien. "Exposition d’une nappe d’accompagnement aux contaminants organiques et au changement climatique : Une approche par l’isotopie et la géochimie". Thesis, Nîmes, 2020. https://tel.archives-ouvertes.fr/tel-03178442.
France draws nearly 40% of its groundwater from alluvial aquifers in direct contact with surface entities. The catchment fields located there exploit a resource in a surface water-groundwater continuum. The impact of anthropogenic activities through contaminants transferred by surface water or the effects of climate change are priority risks that managers are obliged to control in order to guarantee the continuity and quality of their services.This thesis develops an approach to study these risks based on an understanding of the hydrogeological functioning of a typical accompanying groundwater table: the Comps table. Its catchment field continuously exploits the alluvial groundwater of the Rhône and has a simple and adapted configuration allowing the characterisation of determining parameters in the face of these risks. This approach makes it possible to check the consistency of the results between independent tools and to compare their divergences in order to arrive at a synthetic interpretation taking into account their specific characteristics. The knowledge acquired in the course of this work favours intercomparison with similar studies and provides decision-makers with operational tools for resource management.Thus, in the law of the Comps aquifer, the use of geochemical and isotopic tracers and statistical tools reveals that :- the Rhône, and not the Gardon, mainly supplies water from boreholes located as close as possible to the river bank,- A mixture between the waters of the Rhône and those of the karstified limestone massif bordering the Comps tablecloth on its western limit, feeds the boreholes far from the banks,- The transfer time from surface water to the boreholes located near the river bank is characterised by a combination of transfer times ranging from 1 to 120 days, with an average transfer time of 40 days (±10). This configuration evolves significantly during flood periods with faster transfer times that need to be taken into consideration.The exposure of the resource to organic contaminants is therefore subject to this double feeding of the water table, as well as to transfer times spread over several months for contaminants coming from surface water.The monitoring of the different water masses shows an almost continuous exposure of the water table to 11 of the 31 contaminants analysed via its two sources of supply. These are compounds from urban, industrial, agricultural and hospital activities at concentrations of the order of ng/L: caffeine, carbamazepine, sulfamethoxazole, sotalol, salicylic acid, metformin, acetaminophen, atrazine, DEA, simazine and PFOA.During their transfer into the water table, the fate of these contaminants highlights the existence of natural protection mechanisms: reactive degradation-sorption and dilution processes. However, the effectiveness of these mechanisms varies according to the characteristics of the contaminants and the hydrogeological conditions. The evaluation of these processes makes it possible to define a permanent coordination of the configuration of the boreholes in the catchment field in order to meet the needs of the community by optimising the exploitation capacities of the resource associated with a maximum reduction for these eleven contaminants.Furthermore, the contribution of Alpine waters in the Rhône was evaluated at 70 ± 6% in the summer period (mid-July to early September for the years studied). This contribution, which is potentially essential to the sustainability of the river, is essential for the supply of the Comps catchment area
Sivry, Yann. "Utilisation des isotopes stables de Cd, Zn, Cu, Ni et Pb pour quantifier le compartiment échangeable des éléments trace métalliques et de delta66Zn pour tracer les pollutions polymétalliques". Toulouse 3, 2008. http://thesesups.ups-tlse.fr/471/.
A multi-elementary spiking method has been is developpeddeveloped in order to simultaneously quantify and caracterizecharacterize simultaneously the labile pools fraction of Cd, Zn, Ni, Cu and Pb in contaminated soils. This method is has been validated by comparison with 1) radioactive Cd spiking data,g Cd and of2) chemical extractions results. In additionFurthermore, an integrated study of Zn isotopic signatures (d66Zn) in various compartments pools of two contaminated ecosystems (zinc smelting sites of Viviez-Decazeville, S. -W. Of France and of Kempen, N. -E of Belgium) has been performed allowing the identification of various allows to assume a coherent scheme of Zn isotopic fractionations during associated to the metallurgical processes. The differents d66Zn ratio observed in between "enriched" and "residual" zinc would be a powerfull tool to identify the metallurgical contaminations origins. These results demonstrate the efficiency of stable isotopes as tracers for contamination processes and sourcescontaminations tracers
Atti di convegni sul tema "Traçage de pollution":
Leal Junior, Jose Hamilton L., e Ayrton Portilho Bueno. "A segregação planejada: o plano de modernização de Teresina". In Seminario Internacional de Investigación en Urbanismo. Barcelona: Instituto de Arte Americano. Universidad de Buenos Aires, 2013. http://dx.doi.org/10.5821/siiu.5905.