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Artykuły w czasopismach na temat "Arsenic – Environnement"
Dugoin-Clément, Christine, Isabelle Cadet i Pierre Louart. "Les lois chinoises de blocage : miroir des lois d’extraterritorialité américaine et triangulation stratégique". Management & Avenir N° 136, nr 4 (3.08.2023): 61–80. http://dx.doi.org/10.3917/mav.136.0061.
Pełny tekst źródłaDecambron, Adeline. "Prise en charge thérapeutique de l’arthrose chez le chat". Le Nouveau Praticien Vétérinaire canine & féline 19 (grudzień 2022): 32–38. http://dx.doi.org/10.1051/npvcafe/2023006.
Pełny tekst źródłaFerdinand, Yao Diby, Assale Fori Jean Paul, Alla Amani Jonas i Digbehi Zeli Bruno. "Caracterisasion Geochimique des Deblais du Substratum de la Baie du Banco, Abidjan, Basse Cote d‘Ivoire". European Scientific Journal, ESJ 19, nr 36 (31.12.2023): 124. http://dx.doi.org/10.19044/esj.2023.v19n36p124.
Pełny tekst źródłaMatonga, Joel Immanuel. "Using the public trust doctrine to hold mining transnational corporations in Africa accountable for environmental wrongs / Utiliser la doctrine de la confiance publique pour obtenir la responsabilité des sociétés multinationales minières quant à leurs atteintes sur l’environnement". Journal of the African Union Commission on International Law 2021 (2021): 162–84. http://dx.doi.org/10.47348/aucil/2021/a5.
Pełny tekst źródłaSantos, Wederson. "Le handicap évalué par l’interaction sociale : contributions d’une relecture d’Erving Goffman". Capacitismes, nr 1 (22.12.2023). http://dx.doi.org/10.56078/cfla_discapacidad.292.
Pełny tekst źródłaLadame, Valérie. "La maltraitance intrafamiliale aux personnes âgées". Trayectorias Humanas Trascontinentales, nr 10 (8.10.2021). http://dx.doi.org/10.25965/trahs.3695.
Pełny tekst źródłaRozprawy doktorskie na temat "Arsenic – Environnement"
Pham, Mac Thu Trang. "Données récentes sur la toxicité de l'arsenic : son comportement dans l'environnement et ses effets biologiques chez l'homme". Paris 5, 1990. http://www.theses.fr/1990PA05P179.
Pełny tekst źródłaQuemeneur, Marianne. "Les processus biogéochimiques impliqués dans la mobilité de l’arsenic : recherche de bioindicateurs". Electronic Thesis or Diss., Nancy 1, 2008. http://www.theses.fr/2008NAN10088.
Pełny tekst źródłaBacteria can play a major role in the environmental mobility of arsenic (As). The aim of this study was to identify key bacterial players involved in the biotransformation of As and to use them as bioindicators or predictive tools of As behaviour in polluted sites. Novel molecular tools were developed based on the aoxB gene which encodes the catalytic subunit of AsIII-oxidase, and validated for use in the qualitative and quantitative analysis of the AsIII-oxidizing bacterial community. The aoxB gene was exclusively detected in all tested AsIII-oxidizing bacteria and AoxB and 16S rRNA gene phylogenies were broadly coherent, demonstrating the usefulness of the aoxB gene as a powerful functional marker. The application of DGGE and real-time PCR on aoxB genes allowed the rapid and sensitive evaluation of changes in the AsIII-oxidizing community as a function of As speciation and pollution level in surface and groundwaters. AsIII-oxidizers and AsV-reducers were found to coexist in tested soils. The crucial role of indirectly As-mobilizing bacteria was also revealed. Indigenous microflorae affected the speciation and mobility of As inherent within the environmental matrix and/or adsorbed on iron oxy-hydroxydes, according to redox conditions. The relevance of the use of aoxB and arrA genes, as functional markers of AsIII-oxidizers and AsV-reducers, respectively, to evaluate potential As transformation was demonstrated. The detection of these bacterial communities using molecular tools was shown to have great promise in the prediction of As mobility in the environment
Rivera, Zambrano Juan Francisco. "Développement d'un procédé d'élimination de l'Arsenic en milieu aqueux, associant électrocatalyse et filtration". Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENV073/document.
Pełny tekst źródłaThis work deals with the electrochemical synthesis and structural characterisation of composite nano-structured functionalized polymer electrodes containing a homogeneous dispersion of ruthenium oxide or iridium oxide nanoparticles, and the study of their electrocatalytic properties towards arsenic (III) oxidation to arsenic (V) in aqueous medium. The combination of electrocatalytic oxidation of arsenic (III) with the ultrafiltration technique LPR (Liquid Phase Polymer-assisted Retention) allowed us to confirm the usefulness of this combined approach for arsenic removal. In this process, the nanocomposite materials based on iridium oxide showed the most interesting properties because they are capable of catalyzing the oxidation of arsenite in neutral and slightly positive potential. Finally, the iridium oxide nanostructured electrodes are also effective for the catalytic water oxidation of 4-electrons in oxygen and thus have the potential to be used in the context of the dissociation reaction of water. Keywords: ruthenium oxide, iridium oxide, nanocomposite, electrocatalysis, arsenic, ultrafiltration, water oxidation
Xiao, Tangfu. "Environmental impact of thallium related to the mercury-thallium-gold mineralization in southwest Guizhou Province, China". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ65214.pdf.
Pełny tekst źródłaBentahar, Yassine. "Caractérisation physico-chimique des argiles marocaines : application à l’adsorption de l'arsenic et des colorants cationiques en solution aqueuse". Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4081/document.
Pełny tekst źródłaToday drinking water resources are greatly reduced due to population increase accompanied by high industrialization and intensive agricultural development. Releases of varying micropollutants (pesticides, dyes, phenols ...) in the environment are increasing. These pollutants, toxic and poorly degradable, are usually the source of many harmful health effects. They also directly affect the balance of ecosystems following the deterioration of the quality of various environmental medium (soil, water, air). Hence the concern to develop methods that work to preserve water resources against pollution by treating polluted sources. The application of natural and abundant adsorbents like clay in the water treatment is a legitimate way to preserve the water capital. That is why my research is articulated around the physicochemical characterization of a series of natural clays sampled in the northern region of Morocco. Several techniques have been sought: XRD, XRF, FTIR, TGA, The BET-N2 specific surface area, electrophoresis. Furthermore the determination of some physicochemical properties such as CEC and TOC. This allowed us to establish a database with the different properties of these materials. This database may be sought to guide the use of these materials according to their nature. In a second step, we studied the adsorption of arsenic and organic contaminants (methylene blue and methylene violet) by clays. The kinetics of equilibrium adsorbent / adsorbate is an essential step to optimize the conditions for determination of adsorption isotherms
Wang, Yuheng. "Etude cristallochimique de l'immobilisation de l'arsenic par les (hydr)oxydes de fer dans les environnements anoxiques". Paris 6, 2007. http://www.theses.fr/2007PA066384.
Pełny tekst źródłaRivera, zambrano Juan francisco. "Développement d'un procédé d'élimination de l'Arsenic en milieu aqueux, associant électrocatalyse et filtration". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00863977.
Pełny tekst źródłaMolénat, Nathalie. "Etude des biotransformations de différentes formes de l'arsenic en traces et ultra traces en présence de certaines souches pures de micro-organismes". Pau, 1999. http://www.theses.fr/1999PAUU3004.
Pełny tekst źródłaSimeonova, Diliana Dancheva. "Arsenic oxidation of Cenibacterium arsenoxidans : Potential application in bioremediation of arsenic contaminated water". Université Louis Pasteur (Strasbourg) (1971-2008), 2004. https://publication-theses.unistra.fr/public/theses_doctorat/2004/SIMEONOVA_Diliana_Dancheva_2004.pdf.
Pełny tekst źródłaBretier, Marie. "Évaluation de la variabilité spatio-temporelle du mercure et de l'arsenic dans les eaux de surface par échantillonnage passif". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1073.
Pełny tekst źródłaDeveloped around 20 years ago, passive samplers are an alternative to discrete sampling. The sampling of contaminants is realized in-situ and allows to integrate the contamination over the exposure period. Passive samplers have the advantage to lower the quantification limits, to avoid matrix effects during the analysis and to facilitate the sample preservation. For metals, DGT is the most employed technique and allow in its classic configuration to sample cationic metals. These tools were adapted in order to sample mercury and arsenic. Nevertheless, the chemical forms of these contaminants influence their toxicity and their bioavailability which have to be taken into account when characterizing the exposition of aquatic environments. Thus, this thesis aimed to: i) develop and validate, in the laboratory, DGT techniques for the measurement of arsenic and mercury chemical speciation in freshwaters; ii) assess the spatio-temporal variability of mercury and arsenic concentrations and their chemical speciation at different scales in surface freshwaters by passive sampling. Arsenic speciation (AsIII + AsV) with a unique DGT could not be assessed according to the usual procedure since arsenic elution from ferrihydrite binging gel cause an oxidation of AsIII to AsV and therefore a loss of information on the speciation. The setting up of screening plans allowed to optimize this elution step and to elute 22 and 32% AsIII and AsV, respectively, from the ferrihydrite binding gel, with ammonium dihydrogenophosphate (NH4H2PO4) 0.5 M at 75°C with a conversion of 30% of AsIII to AsV. Through the use of corrective factors, AsIII and AsV could be monitored from 0.24 et 0.33 μg.L-1 in average on the exposure period for DGT (7 days) in surface freshwaters at 20°C. For the monitoring of mercury speciation (HgII + MeHg) with a unique DGT, the analysis step proved to be problematic since it necessitates to adapt double isotopic dilution technique for the DGT. While MeHg could be measured by DGT from 0.08 ng.L-1 in surface freshwaters, laboratory tests have highlighted specific difficulties in the measurement of HgII certainly in relation to 3M binding gel properties that could not be identified during this thesis. DGT were then applied in-situ in 4 different contexts in order to evaluate their relevance for integrating spatio-temporal variations of metals concentrations. First, during dam flushing operations on the Rhône River during ~15 days, we have showed that DGT were highly representative of the dynamic of metals concentrations and As speciation in comparison with discrete sampling, notably integrating the increase of Mn, Ni, Co and As (AsIII and then AsV) dissolved concentrations. Then, the use of DGT on the Gier and Deûle sites for the monitoring of mercury speciation have evidenced the consistency between mercury and methylmercury concentrations measured by passive and discrete sampling measurements in dynamic surface freshwaters from weekly to annual scales. Nevertheless, in environmental conditions which favor dissolved gaseous mercury production, Hg concentrations estimated by DGT would be overestimated as a reason of an uptake of these mercury chemical forms by DGT, necessitating to interpret the results with caution. Finally, DGT applications on the Rapel lake watershed in Chile have highlighted DGT capacity to identify the spatial variation of contamination as well as DGT relevance to integrate temporal variations of Hg concentrations linked with hydropower production plant operations
Książki na temat "Arsenic – Environnement"
Canada, Canada Environnement. L' arsenic et ses composés. Ottawa, Ont: Ministre des approvisionnements et services Canada, 1993.
Znajdź pełny tekst źródła1952-, Frankenberger W. T., red. Environmental chemistry of arsenic. New York: Marcel Dekker, 2002.
Znajdź pełny tekst źródła