Letteratura scientifica selezionata sul tema "Matière organique dissoute – Échantillonnage"
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Articoli di riviste sul tema "Matière organique dissoute – Échantillonnage":
Cazelles, B., e D. Fontvieille. "Modélisation d'un système lotique pollué par une charge organique : prise en compte de l'activité des microorganismes benthiques". Revue des sciences de l'eau 2, n. 4 (12 aprile 2005): 511–41. http://dx.doi.org/10.7202/705041ar.
Mounier, S., N. Patel, L. Quilici, J. Y. Benaim e C. Benamou. "Fluorescence 3D de la matière organique dissoute du fleuve amazone". Water Research 33, n. 6 (aprile 1999): 1523–33. http://dx.doi.org/10.1016/s0043-1354(98)00347-9.
Croue, J. P., B. Martin-Mousset, E. Lefebre, A. Déguin e B. Legube. "Impact des traitement de potabilisation sur le CODB et la distribution des substances humiques et non humiques de la matière organique naturelle". Revue des sciences de l'eau 10, n. 1 (12 aprile 2005): 63–81. http://dx.doi.org/10.7202/705270ar.
Martin-Mousset, B., J. P. Croue, E. Lefebvre e B. Legube. "Distribution et caractérisation de la matière organique dissoute d'eaux naturelles de surface". Water Research 31, n. 3 (marzo 1997): 541–53. http://dx.doi.org/10.1016/s0043-1354(96)00259-x.
El Halouani, H., B. Picoti, C. Casellas, G. Pena e J. Bontoux. "Elimination de l'azote et du phosphore dans un lagunage à haut rendement". Revue des sciences de l'eau 6, n. 1 (12 aprile 2005): 47–61. http://dx.doi.org/10.7202/705165ar.
Cheknane, Benamar, Faiza Zermane, Wahib Mohamed Naceur, Maiouf Belhamel e Maxime Pontie. "Prétraitement de l’eau de mer par coagulation-floculation en lit fluidisé couplée à l’adsorption sur une argile algérienne modifiée". Journal of Renewable Energies 9, n. 1 (30 aprile 2006): 11–16. http://dx.doi.org/10.54966/jreen.v9i1.809.
Côté, R., e C. Otis. "Étude de la biodégradation de l'acide déhydroabiétique par Bacillus psychrophilus". Revue des sciences de l'eau 2, n. 3 (12 aprile 2005): 313–24. http://dx.doi.org/10.7202/705033ar.
Dossier-Berne, F., N. Merleti, B. Cauchi e B. Legube. "Évolution des acides aminés et de la matière organique dissoute dans une filière de production d'eau potable: Corrélations avec le carbone organique dissous biodégradable et le potentiel de demande en chlore à long terme". Revue des sciences de l'eau 9, n. 1 (12 aprile 2005): 115–33. http://dx.doi.org/10.7202/705245ar.
Crottereau, Cécile, e Daniel Delmas. "Régulation de l'activité exoprotéolytique bactérienne aux concentrations naturelles en matière organique dissoute dans un marais maritime". Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie 322, n. 7 (luglio 1999): 551–56. http://dx.doi.org/10.1016/s0764-4469(00)88524-8.
Guibaud, G., e J. Ayele. "Relation entre la spéciation de l'aluminium et sa libération par des sols bruns acides - Influence de la matière organique du sol et de la matière organique dissoute". Journal européen d’hydrologie 31, n. 2 (2000): 201–21. http://dx.doi.org/10.1051/water/20003102201.
Tesi sul tema "Matière organique dissoute – Échantillonnage":
Mougin, Jérémy. "Développement d'outils pour le suivi de la matière organique dans le bassin Artois-Picardie". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILR003.
The origin and fate of organic matter in watercourses are still poorly understood and requirethe implementation of innovative solutions in line with the problems of the environment studied.For that purpose, a mobile laboratory was entirely designed, built and then automated. Itprovides a secure structure for embedding on-line monitoring equipment, including fluorescenceprobes, allowing high frequency monitoring of the selected study site, here the Marque Rivièrein Hem (France).In addition to this high frequency data, this mobile laboratory allows sampling, a necessarystep for a more complete characterisation of dissolved organic matter. An innovative methodologyhas been developed within the framework of this project, through an optimised samplingalgorithm named « OSA ». It is based on the analysis of high frequency data generated by thelaboratory to drive an automatic sampler-filter.The samples collected provided additional insights on the behaviour of dissolved organicmatter at this site and allowed identifying some of its sources. The influence of wastewatertreatment plants located upstream of the study site was particularly pointed out, showing arelevant impact on the variability of organic matter in the river. The operational strategy alsomade it possible to monitor specific and short events, such as soil leaching following heavyrainfall, with specific organic matter inputs
De, Perre Chloé. "Etude des interactions matière organique dissoute : contaminants organiques dans l'environnement aquatique". Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13933/document.
In relation with a widespread human impact on aquatic resources and ecosystems, many organic chemical contaminants are present at trace levels in aquatic environments. In parallel to these contaminants, dissolved organic matter (DOM), which is composed of complex mixtures of molecules and macromolecules, is also found and could be associated with these contaminants and influence their behavior and distribution. Interactions between DOM and contaminants can be very difficult to understand because they depend on many factors such as the nature of contaminants and DOM, as well as on environmental physico-chemical parameters. The aim of this work was thus to study these interactions. Organic contaminants studied were Polycyclic Aromatic Hydrocarbons (PAHs) and pharmaceuticals. On the other hand, several types of natural and commercial DOM have been used. To study the interactions, several analytical techniques have been developed like solid phase microextraction coupled to gas chromatography and mass spectrometry and fluorescence quenching
Landa-Bezwierchy, Marine. "Lien entre matière organique dissoute et diversité des communautés bactériennes hétérotrophobes marines". Paris 6, 2013. http://www.theses.fr/2013PA066460.
Knoth, de Zarruk Katrin. "Transferts réactifs et mobilité de la matière organique dissoute dans les sols". Avignon, 2007. http://www.theses.fr/2007AVIG0605.
DOM is present in all soils, waters and organic wastes and can be important in binding and co-transporting metals and organic polluants, there fore endangering the quality of potable waters. Dom is higly variable over space and time, which complicates its characterization. A new approach to DOM, a bottom-up approach is presented that concentrates on the molecular composition of DOM. By the means of a thorough literature research, the importance of simple individual compounds in environmental processes is demonstrated. Dialysis of DOM from different sources revealed a great variability of DOM samples in respect of molecular composition and size. Eighty, 70, 50 and 40% of the total organic carbon (TOC) was found in the fractions with low molecular weight in vinasse, leaf compost, soil and chicken manure, respectively. More than 40% of the TOC in vinasse and leaf compost belonged to the fraction with a molecular weight <500 Da, revealing the abundance of small weight in vinasse, suggesting a potential co-transport of copper by low molecular weight compounds. In order to enable us to better estimate the true co-transport of copper by low molecular weight compounds, column experiments were conducted to determine sorption and biodegradation dynamics for a set of selected compounds (glucose, glucosamine, glucuronic acid, alanine, citric acid, acetic acid, caffeic acid, dextran). Results showed that functional group content plays a major role in compound mobility. Even seemingly similar molecules that only differ in one functional group are sorbed and biodegraded in very different manners. Afters combining metal-complexing with sorption and biodegradation parameters, acetic acid was found to be the compound with the highest co-transport potential
Martin, Bénédicte. "La matière organique naturelle dissoute des eaux de surface : fractionnement, caractérisation et réactivité". Poitiers, 1995. http://www.theses.fr/1995POIT2268.
El-Nahhal, Ibrahim. "Impact de la matière organique anthropique issue des stations d'épurations sur la fluorescence de la matière organique en zone côtière". Thesis, Toulon, 2018. http://www.theses.fr/2018TOUL0005/document.
Anthropogenic activities have done major changes to our global system. The coastal dissolved organic matter has great influenceon the global carbon cycle and hence climate change. The riverine input of dissolved organic matter represents the terrestrialorganic matter. Urbanized rivers is greatly impacted by the anthropogenic dissolved organic matter coming from wastewatertreatment plants . Chromophoric dissolved organic matter is a subgroup of the dissolved organic matter which can absorb light.Fluorescent dissolved organic matter in turn is a subgroup of the chromophoric dissolved organic matter .The fluorescence signalof the anthropogenic dissolved organic matter in the coastal zone is not well characterized and evaluated in the literature.Photochemically induced degradations and changes at the molecular level is considered to be a great process which could influencethe dissolved organic matter . In the present study, Laboratory mixing experiments several sunlight irradiation experiments wereconducted with several modes of filtration of three endmember mixing components ( River water, Sea water , wastewater treatmentplant effluent discharge) with the objective of finding a specific signal of fluorescence which could be a tracer of the anthropogenicdissolved organic matter through using the fluorescence spectroscopy excitation emission matrices (EEMs) coupled with thechemometric statistical technique of Parallel Factor analysis CP/PARAFAC. Moreover, multilinear regression model between thecontribution of CP/PARAFAC components and two content fraction of River water and Seawater endmember was developed. Inaddition the kinetics of the multilinear regression parameters were investigated. On top of that , geographical investigations of theevolution of fluorescence signal in the Gapeau river till the sea were conducted. Furthermore, Temporal investigation of thefluorescence signal for four water points in the pathway of Gapeau river were done. The multilinear regression model developedwas applied to model the results of the geographical and temporal field experiments. Results have shown that Multilinearregression model for contribution of CP/PARAFAC components is excellent and could be done for the three endmembers. Inaddition the search for specific fluorescence signal or signature for river water, wastewater treatment plants and sea water couldn’tbe done in this work. In human impacted coastal zone, residual fluorescent organic matter come from wastewater treatment plant,and no specific signal from sea water could be detected near the coast
Semaoune, Priscillia. "Dynamique de l'azote à l'interface sol-plante, relation avec la matière organique des sols : apport de la géochimie organique et de la biogéochimie isotopique". Paris 6, 2012. http://www.theses.fr/2012PA066122.
The purpose of this study is a better understanding of the processes involved in the N transfer in soils and soil-plant interface, and the link between the chemical structure of SOM and DOM and NO3- and NH4+ in the soil solution. We experimentally showed that the transport of NO3- in water did not affect their isotopic composition for N and O. The net uptake of maize grown hydroponically with NH4+ or NO3-, revealed a fractionation associated with absorption probably due to an efflux of enriched inorganic N from roots. 15N enrichment was observed in leaves compared to roots, the measurement of δ15N-NO3- in tissue revealed the role of assimilation in this discrimination. The study of continuum SOM, DOM and inorganic N was performed on the watershed Kerrien in permanent grassland. Samples of soil were realized at different depths and along the slope with contrasting water conditions during high and low water periods. The SOM and the DOM were characterized at the molecular level by 13C NMR and pyrolysis. Isotopic biogeochemistry was used to identify the origin of C and N and to trace the processes. We observed an influence of hydromorphic on the continuum. Evolution of δ13C along the transect reflects the preferential degradation of OM, variations with depth resulting from degradation and fractionation associated with microbial respiration. We distinguished three types of profiles along the slope: high in culture, medium in grassland, low in high waterlogging, which reveal the involvement of different processes
Cotrim, Da Cunha Leticia. "Caractérisation de la matière organique particulaire et dissoute dans un fleuve méditerranéen, le Tech". Perpignan, 2000. http://www.theses.fr/2000PERP0376.
Characterisation of organic matter in small rivers and streams is important to qualify the impact of human activity and identify the main biogeochemical processes in the drainage basin. Small drainage basin areas enable a better approach to characterise and qualify the riverine organic matter
Massicotte, Philippe. "Modélisation et simulation de la dynamique de la matière organique dissoute en milieu fluvial". Thèse, Université du Québec à Trois-Rivières, 2012. http://depot-e.uqtr.ca/4459/1/030309442.pdf.
Boualam, Marc. "Origine de la matière organique et devenir de bactéries coliformes dans des eaux faiblement nutritives". Nancy 1, 2001. http://www.theses.fr/2001NAN12009.
Coliform bacteria are faecal contamination indicators and their detection in treated waters is a frequent cause of health non-compliance. Survival of these organisms is strongly related to the biodegradable dissolved organic matter (DOM) of waters. The aim ofthis research work is to underline the influence of the origin of DOM on the fate of planctonic and fixed coliform bacteria in low nutritive waters (river water sampled after heavy rainfalls and algal bloom water), conveying specific organic matrix, of which a fraction is likely to pass through the treatment barrier. The study of coliforms behaviour in drinking waters, without disruption of their nutritive status (DOC ranged from 1. 5 to 2 mg L-1 with BDOC near to 30%) indicates a rapid culturability loss and the absence of durable colonisation of pilot systems. On the other hand, these bacteria are able to keep their culturability at least 28 days in low nutritive waters having DOC concentrations classically observed in drinking waters. A relationship specific of the water type between biodegradable DOC and coliforms culturability loss, clearly appears. Finally, these bacteria keep their capacity to multiply, even when they loss their culturability, suggesting a viable but non-culturable physiological state. The following of coliforms biofilm development by FTIRIATR spectroscopy in low nutritive waters and in a drinking water confirms the previous observations. The biofilm is stable for 15 days in low nutritive waters, whereas its presence become unsignificant only after one day in the drinking water