Tesis sobre el tema "Détection d'eau"
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Fontaine, Mélanie. "Détection moléculaire du parasite Cryptosporidium dans des échantillons d'eau". Nantes, 2003. http://archive.bu.univ-nantes.fr/pollux/show.action?id=37b1f1ed-7c51-44e3-8fb8-8e3bfda369d6.
Texto completoThe protozoan parasite Cryptosporidium is known to occur widely in both raw and drinking water and is the cause of water-borne outbreaks of gastroenteritis throughout the world. The routinely used method for the detection of Cryptosporidium oocysts in water is based on an immunofluorescence assay which is non-specific for the human pathogenic species, C. Parvum. We have developed a TaqMan PCR test that accurately quantifies C. Parvum oocysts in water samples. The protocol consisted of the following successive steps: Envirochek® capsule filtration, immunomagnetic-separation (IMS), thermal lysis followed by DNA purification and finally real-time PCR using TaqMan technology. Quantification was accomplished by comparing the fluorescence signals obtained from test samples with those from standard dilutions of C. Parvum oocysts. This IMS-TaqMan PCR assay permits rapid and reliable quantification over six orders of magnitude, with a quantification limit of 5 oocysts. Replicate samples of spiked tap water and Seine river water samples were tested and oocyst recoveries were range respectively from 69,7 % (± 22,3) to 84,5 % (± 9,7) and from 46,4 % (± 7,3) to 57,6 % (± 10,7). We also report on a TaqMan reverse transcription-PCR method that targets and quantifies C. Parvum 18S rRNA for detecting viable oocysts in water. This test performed in water samples obtained similar recoveries. To study the suitability of 18S rRNA as an indicator of Cryptosporidium oocysts viability, the stability of 18S rRNA and rDNA was monitored by real-time RT-PCR following various heat treatments. Our results indicate that 18S rRNA detection may not be directly associated with viability following heat inactivation of oocysts even if in all the experiments 18S rRNA was less stable than rDNA. These new molecular methods offer a rapid, sensitive and specific alternative for C. Parvum oocyst quantification in water and can be useful for better health risk assessment during routine controls of drinking water quality, evaluation of treatment efficiency as well as identification of risk resources
Guépié, Blaise Kévin. "Détection séquentielle de signaux transitoires : application à la surveillance d'un réseau d'eau potable". Troyes, 2013. http://www.theses.fr/2013TROY0004.
Texto completoThis thesis is part of the project "Vigires'eau" funded by the French National Research Agency program through the Concepts, Systems and Tools for Global Security (ANRCSOSG, ANR-08-SECU-013-02). It addresses the problem of sequentially detecting a transient signal in safety-critical systems. For these systems, the detection of a change has to be made, on the one hand, with a detection delay less than a prescribed value, and on the other hand, with the minimal probability of nondetection under constraint on the probability of false alarm. The optimality criteria and algorithms found in the literature are not suitable for this kind of detection. We propose in this thesis a new optimality criterion which aims to minimize the worst probability of missed detection under constraint on the worst probability of false alarm. To solve the detection problem according to the new optimality criterion, we introduce a detection algorithm called Variable Thresholds Window Limited CUSUM. After analyzing the statistical performance of this algorithm, we proceed to the optimization of the latter. The algorithm is then applied to a concrete case which is the monitoring of a drinking water distribution system. Such monitoring is critical in the sense that any contamination, whether accidental or intentional, causes a public health problem
Fitzback, Josée. "Détection des cours d'eau par images radar selon les stratégies de la vision humaine". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0006/MQ41900.pdf.
Texto completoBissery, Christophe. "La détection centralisée des fuites sur les réseaux d'eau potable par réseaux de neurones". Lyon, INSA, 1994. http://www.theses.fr/1994ISAL0112.
Texto completoFor few years, under the influence of the urban environment, the perception of dysfunction risk in technical systems and in particular in water supply networks has changed. The lack of risk doesn't exist and it's necessary to learn how to manage it. It's in this way that appears the need of centralized leakage detection on water supply networks, leaks that represent an important part of the dysfunction risk of water supply. This study proposes a centralized leakage detection system using a computerized neural network approach. The building method of learning bases and the sensors localization method are pointed out and developed. This study has showed that on a realistic network model results obtained with the centralized leakage detection system using a computerized neural network approach allowed experimentations on real networks. The study ends on the presentation of the working priorities for these real experimentations (and in particular the need of hourly water consumption previsions)
Gondrand, Cécile. "Analyse des transferts d'eau dans les micropiles à combustible". Phd thesis, Toulouse, INPT, 2006. http://oatao.univ-toulouse.fr/7543/1/gondrand.pdf.
Texto completoLeyli, Abadi Milad. "Modélisation dynamique, classification et détection de changement dans les panels catégoriels issus d'un réseau d'eau intelligent". Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC2003.
Texto completoNowadays, we observe a growing concern raised by the environmental issues and those related to management of the resources as electricity and water. As part of a collaborative project with Veolia Eau d'Île-de-France and le syndicat des eaux d'Île-de-France, this PhD research addresses initially the clustering of water consumers based on their consumption behavior dynamics over time. These dynamics, in each cluster, depend on a number of exogenous factors. To model this joint density, non-homogeneous Markov models are investigated as the components of a mixture model. Hence, the estimation of the parameters in each cluster allows to predict the future consumption behaviors independently. Afterwards, the problem of online structural change detection in a set of consumption behavior sequences is addressed. To this end, a sequential hypothesis testing of generalized likelihood ratio, based on a non-homogeneous Markov model is proposed. An adaptive threshold is also used which can be adjusted throughout the various types of changes and may reduce the number of false alarms. The results on a real dataset which is issued from a water network allow to highlight the effectiveness of the proposed methods both in terms of clustering and change detection. Finally, the analysis of the estimated parameters of both models allows to study the influence of exogenous factors on clustering and detected changes
Yaradou, Diaraf Farba. "Legionella pneumophila : de la détection dans les réseaux d'eau à l'étude de l'invasion des cellules épithéliales pulmonaires humaines". Lyon 1, 2007. http://www.theses.fr/2007LYO10174.
Texto completoJacob, Paul. "Détection et compréhension des mécanismes de mouillage en distillation membranaire sous vide appliquée au dessalement d'eau de mer". Thesis, Toulouse, INSA, 2018. http://www.theses.fr/2018ISAT0036.
Texto completoWith an ever-increasing population and the growing disparity in potable water resource, humanity has turned its attention to the oceans for its potable water needs. To overcome the current limitations in current desalination technologies, membrane distillation (MD) is actively being developed. The interest of MD for seawater desalination was established in the last decades but today the risk of membrane wetting is one of the major barrier for industrial implementation of MD. Under the framework of the ANR project “WETMEM”, the issue of this thesis was to develop tools for better understanding wetting mechanisms in vacuum membrane distillation. Several fabricated (WETMEM partners) and commercial membranes were studied to understand the influences of membrane properties on wettability. Therefore, a definition and classification on wetting were formulated. After that two wetting indicators were developed using scanning electron microscopy and X-ray dispersion spectroscopy under a method called “Detection of Dissolved Tracer Intrusion”. A proof of concept was provided with various wetting mechanisms visualized and interpreted. These ex-situ indicators were used with wettability tools (Contact Angle, Liquid Entry Pressure) to understand the influence of temperature (35-50°C), salinity (22-310 g/L NaCl sol.) and flow rate (400 – 4000 Re) on wetting and wettability of a PVDF membrane under vacuum membrane distillation. Indeed, it was found that salinity has a greater impact on wetting than the other operating parameters. Additionally, a proof of concept was provided for non-invasive in-situ optical method for visualizing wetting in membrane distillation. Progression of in-situ wetting visualization was validated at different scales for various saline solutions and seawaters
Rouleau, Jean François. "Développement d'une méthode micro-onde différentielle pour la détection de faibles quantités de vapeur d'eau dans l'hexafluorure de soufre (SF6)". Thèse, Université du Québec à Trois-Rivières, 2000. http://depot-e.uqtr.ca/6641/1/000681091.pdf.
Texto completoRenard, Benjamin. "Détection et prise en compte d'éventuels impacts du changement climatique sur les extrêmes hydrologiques en France". Grenoble INPG, 2006. http://www.theses.fr/2006INPG0095.
Texto completoClimate change is widely considered as a reality by scientists. Nevertheless, impacts on hydrological extremes are more difficult to observe and to predict. The aim of this thesis is to answer the following questions: How to detect changes in hydro-climatic series? What are the observed changes for extreme discharges in France? How to take into account possible changes in frequency analysis? These objectives refer to both the local and the regional scales. For this purpose, methodological aspects have been explored, by evaluating the benefit ofusing statistical tools like the Bayesian analysis or the use of copulas as a model for spatial dependence
Ould, Hamoni Mohamed Abderrahmane. "Détection des fuites d'eau dans les barrages en terre par polarisation spontanée : détermination expérimentale du potentiel zêta et du coefficient de couplage". Mémoire, Université de Sherbrooke, 2013. http://hdl.handle.net/11143/6201.
Texto completoPouchet, Ivan. "Sondage atmosphérique par diode laser : application à la détection in situ de H2O, CH4 et CO2 dans la troposphère et la basse stratosphère". Paris 6, 2003. http://www.theses.fr/2003PA066265.
Texto completoBailly, Guillaume. "Développement de la transduction microonde appliquée à la détection d'ammoniac : du nanomatériau au capteur large bande, compréhension des mécanismes et influence des traces d'eau". Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCK029/document.
Texto completoThe main objective of this thesis is to propose an analysis of the microwave transduction specificities in the framework of ammonia sensing applications. The two main features of this transduction are its broadband characterization (1 to 8 GHz) as well as its sensitive materials (dielectrics). This transduction method is based on the interaction between a polluting gas and a sensitive material deposited on the surface of a microwave-specific propagating structure. The response of the sensor is not directly induced by the dielectric properties of the gaseous target molecule, but rather by those of the target species adsorbed on the surface of the sensitive material. This adsorption causes a modification of the sensor parameters measured by a vector network analyzer. Unlike more conventional transducers such as conductimetry, this principle works at room temperature with any type of material, including electrical insulators.The first work carried out during this thesis led to the development of a new experimental bench adapted specifically for the study of microwave gas sensors by measuring the S-parameters in reflection and transmission modes. This development includes the design of two new generations of sensors, coated with metal oxides (iron or titanium oxides) commercially available or synthesized during the study. The first sensor comprises interdigital circuits while the second sensor is a trapezoidal resonator. The latter is characterized by a series of frequencies of interest regularly distributed between 1 and 8 GHz. The association of a mass spectrometer with the measurement bench allowed to follow the adsorption and desorption behavior of the target species which is ammonia (10-100 ppm), but also the behavior of the vector gas conventionally used, argon, and water initially adsorbed on the sensitive material or intentionally added during the experiment. The objective is to study the role of water as interfering with the detection of ammonia, the main target species. A third molecule of interest, ethanol, was also used during the experiments in order to estimate the possible differences in the detected molecules behaviors. The experimental results were exploited using specific data processing protocols established during this thesis. Temporal treatments were carried out to study the kinetic behavior of the sensor, while spectral treatments allowed to apprehend the broadband aspect of the sensor response in the presence of pollutants.The first major result is the significant increase in sensitivity to ammonia, which significantly lowered the detection threshold to ammonia concentrations in the 10 ppm range. Titanium dioxide has been identified as a good candidate for ammonia detection, with reflection coefficient variations up to 6 dB for 300 ppm. The role of the water initially adsorbed on the sensitive material has been elucidated, showing that its influence is significant only during the first few minutes of the experiments. Thus, it is possible to detect ammonia in the presence of residual moisture. The processes induced by the gaseous exposures and particularly by the carrier gas were identified, and confirmed that the sensor response was solely due to its interaction with the target molecules. Another major result is the definition of the operating conditions that are necessary for the establishment of the selectivity. Our theoretical analysis clearly demonstrated the interest of broadband measurements in terms of discrimination of target molecules. This analysis has been tested in multitarget experiments using ammonia, water and ethanol. These observations allowed to establish the specifications of a new generation of microwave sensors, guaranteeing systematic discrimination between these three molecules
Mandel, Denis. "Diagnostic à base de redondance analytique : application à un réseau urbain de distribution d'eau potable". Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL127N.
Texto completoGuyot, Patrice. "Caractérisation et reconnaissance de sons d'eau pour le suivi des activités de la vie quotidienne : une approche fondée sur le signal, l'acoustique et la perception". Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2311/.
Texto completoThe analysis of instrumental activities of daily life is an important tool in the early diagnosis of dementia such as Alzheimer. The IMMED project investigates tele-monitoring technologies to support doctors in the diagnostic and follow-up of the illnesses. The project aims to automatically produce indexes to facilitate the doctor’s navigation throughout the individual video recordings. Water sound recognition is very useful to identify everyday activities (e. G. Hygiene, household, cooking, etc. ). Classical methods of sound recognition, based on learning techniques, are ineffective in the context of the IMMED corpus, where data are very heterogeneous. Computational auditory scene analysis provides a theoretical framework for audio event detection in everyday life recordings. We review applications of single or multiple audio event detection in real life. We propose a new system of water flow recognition, based on a new feature called spectral cover. Our system obtains good results on more than seven hours of videos, and thus is integrated to the IMMED framework. A second stage improves the system precision using Gammatone Cepstral Coefficients and Support Vector Machines. However, a perceptive study shows the difficulty to characterize water sounds by a unique definition. To detect other water sounds than water flow, we used material provide by acoustics studies. A liquid sound comes mainly from harmonic vibrations resulting from the entrainment of air bubbles. We depicted an original system to recognize water sounds as group of air bubble sounds. This new system is able to detect a wide variety of water sounds, but cannot replace our water flow detection system. Our two systems seem complementary to provide a robust recognition of different water sounds of daily living. A perceptive study aims to compare our two approaches with human perception. A free categorization task has been set up on various excerpts of liquid sounds. The framework of this experiment encourages causal similarity. Results show several classes of liquids sounds, which may reflect the cognitive categories. In a final experiment performed on these categories, most of the sounds are detected by one of our two systems. This result emphasizes the necessary and sufficient aspect of our two approaches, which seem relevant to characterize and identify a large set of sounds produced by the water
Bounaix, Fabrice. "Etude et réalisation d'un spectromètre haute sensibilité à diode laser pour la mesure de traces de gaz : application à la détection de la vapeur d'eau". Grenoble 1, 1993. http://www.theses.fr/1993GRE10018.
Texto completoBruny, Guillaume. "Production et caractérisation d'agrégats moléculaires protonés contenant un nombre donné de molécules d'eau auprès de dispositif DIAM". Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00585596.
Texto completoKengne, William Charky. "Détection des ruptures dans les processus causaux : application aux débits du bassin versant de la Sanaga au Cameroun". Phd thesis, Université Panthéon-Sorbonne - Paris I, 2012. http://tel.archives-ouvertes.fr/tel-00695364.
Texto completoHumez, Pauline. "Traçage des intrusions de CO2 dans les aquifères d'eau douce par les méthodes multi-isotopiques". Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2012. http://pastel.archives-ouvertes.fr/pastel-00797525.
Texto completoLimery, Anasthase. "Étude et réalisation d’un lidar Raman pour la détection d’hydrogène et de vapeur d’eau dans une alvéole de stockage de colis radioactifs". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV005/document.
Texto completoThe CIGEO project, led by the ANDRA agency, aims at enabling future deep geological disposal of french nuclear waste packages. Those packages could be stored in hundred-meters long underground galleries, and may release hydrogen gas (H2), which is explosive at concentrations above 4% in the air. For safety concerns, it is important to ensure that H2 concentration remains well below the lower explosive limit. The objective of this thesis work, conducted at the ONERA agency, is to design and build a lidar which enable high-resolution (3 m) remote profiling of H2 concentration (0-4%) over hundreds of meters. Such a lidar could perform nonintrusive H2 detection and then prevent H2-related explosion risks. This lidar measures vibrational Raman scattering in the UV domain (355 – 420 nm). Its design takes into account the specific conditions expected in storage galleries. A highspeed and sensitive detection stage has been chosen, based on SiPM (Silicium Photomultiplier) technology in photon counting mode. Due to a spectral overlap between molecular hydrogen and water vapor Raman spectra, the need of a H2O measurement channel has been demonstrated. A three-channel spectral analyzer (H2, H2O and N2 used as reference) has been designed and implemented. Signal processing in real time has been developed to display H2 and H2O concentration profiles. This lidar has been tested in a reduced range scene (100 m) enabling hydrogen gas releases. Simultaneous measurements of concentration profiles of natural water vapor and hydrogen gas (0-2%) have been performed at 85 m with 1-meter and 1-minute resolution and a 600 ppm detectivity
Krayem, Maha. "Etude des effets de l'arsenic et du cuivre sur un macrophyte aquatique, Myriophyllum alterniflorum D.C. : évaluation des biomarqueurs pour la détection précoce de pollution". Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0131.
Texto completoAlternate watermilfoil, Myriophyllum alterniflorum is an aquatic macrophyte presented in the rivers of the Limousin region in France whose potential for bioindication of metal pollution has been demonstrated. The objective of this study is to identify in this species sensitive biomarkers for the early detection of pollution in a river by a metal copper, and a metalloid, arsenic. To achieve this goal, a synthetic medium whose composition is representative of the water quality of the river Vienne, was prepared (Vienne medium). The composition of the medium studied is verified by ICP-MS and ion chromatography (IC). The development of the macrophyte was followed in a control medium, a copper contaminated medium and another contaminated with arsenic at a concentration of 100 µg/L for 21 days. During this period, the respiratory and photosynthetic activities of Myriophyllum alterniflorum, the concentrations of chlorophyll a, b and carotenoids, levels of malondialdehyde, osmotic potential, and phytochelatins were recorded. This monitoring has been made in a closed system (400mL culture boxes) taking into account the trophy of the medium (eutrophic and oligotrophic conditions), and then in a recirculating system (aquariums of 150 L) taking into account the hydrodynamic conditions (turbulent, laminar and quiet areas)
Thomas, Marielle. "Biodétection en temps réel. Contribution à la réalisation d'un nouveau système de détection biologique précoce de la pollution des eaux de surface, fondé sur l'exploitation des décharges autostimulatrices d'un poisson électrique tropical : Apteronotus albifrons, Apteronotidae-Gymnotiformes". Nancy 1, 1996. http://docnum.univ-lorraine.fr/public/SCD_T_1996_0018_THOMAS.pdf.
Texto completoRoth, Estelle. "Détection et modélisation du vieillissement et du colmatage de membranes d'osmose inverse par traitement numérique de signaux issus de traçage par des ions : application à l'étude des membranes FT30-4040 utilisées dans la préparation d'eau ultrapure". Mulhouse, 1998. http://www.theses.fr/1998MULH0528.
Texto completoBuridon, Victor. "Application de la spectrométrie de masse COINTOF à l'étude de la dissociation de petits agrégats d'eau protonés par collision sur un atome d'argon : développement d'une cible de nano-gouttes de gaz rare". Phd thesis, Université Claude Bernard - Lyon I, 2013. http://tel.archives-ouvertes.fr/tel-00994146.
Texto completoHuppé, Vicky. "Analyse de l'eau de sources naturelles en régions éloignées et étude de gènes conservés dans l'évolution des parasites protozoaires retrouvés dans l'eau". Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26419/26419.pdf.
Texto completoArnold-Bos, Andreas. "La surveillance maritime en imagerie radar bistatique : théorie, simulation, contribution à la détection automatique du sillage des navires". Phd thesis, Université de Bretagne occidentale - Brest, 2010. http://tel.archives-ouvertes.fr/tel-00763477.
Texto completoBerthias, Francis. "Thermalisation dans une nanogoutte d’eau". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1164/document.
Texto completoThe evaporation of a water molecule resulting in the rupture of one or more hydrogen bonds. These hydrogen bonds are responsible for many remarkable properties of water. At the macroscopic scale, water is well known for its ability to thermalize a system, while at the microscopic level, a high-speed transfer of vibrational energy through hydrogen bonding was observed. What scale of nanogoutte when a limited number of molecules come into play? In the experiment carried out with the device DIAM IPN Lyon, the relaxation of a nanogoutte of protonated water is observed after electronic excitation of one of its molecules. The implementation of a velocity vector imaging method associated with the technical COINTOF (Correlated Ion and Neutral Time-Of-Flight) allowed the measurement of the velocity distribution of molecules of evaporated protonated water clusters, mass and energy preselected. The shape of the measured velocity distributions shows that even for some nanodroplets composed of few water molecules, the energy is redistributed in the drop before evaporation. For nanodroplets containing less than ten water molecules, the measured velocity distributions are closed to those expected for macroscopic droplets. The statistical redistribution of energy appears as a dominant relaxation process. However, the measurement of the velocity distribution also highlights a distinct contribution at high velocity corresponding to the ejection of a molecule before complete redistribution of energy. The measured velocity distributions for heavy water nanodroplets deuterated show a proportion of non-ergodic most important events that for normal water. The measurements carried out with different target atoms show that the proportion of non-ergodic events decreases with decreasing the energy deposited in the nanogoutte
Azzi, Mohammed Amin. "Etude du ressuage des bétons de parois moulées - influence des paramètres de formulation". Thesis, Artois, 2017. http://www.theses.fr/2017ARTO0204.
Texto completoThe diaphragm walls are foundations made with reinforced concrete. The concrete of diaphragm wall is never vibrated and has a high fluidity. The observations recorded following excavation and planing of diaphragm walls demonstrate that defects are observed which are correlated with concrete bleeding during placement. Water upwelling pathology represents 90% of all disorders observed at project sites. Mix components are often implicated. A study was conducted to understand the influence of various parameters affecting the bleeding. Four concrete mix designs derived from the field were characterized in the laboratory. On a jobsite, one design has, revealed its robustness with respect to bleeding, whereas the other three have led to pathologies of varying severity. The tested concrete displaying the most of pathologies was modified so as to observe the effect of different mix components on the forced and static bleeding. A range of pressures was introduced as a means of simulating various diaphragm wall heights.This study validated the pressure 5 bar predicted by the Bauer recommendations. The basic formulation of this concrete of foundation has been modified in order to have a continuous granular curve, G / S close to 1 and an increasing in the dosage of fines greater thinly than 430 kg / m3. The results of tests served to limit the admissible threshold of filter press Bauer at 15 ml instead of 24,4 ml. The formulations of the concrete foundation of several diaphragm walls have been modified accordingly, which validated the previous prescriptions. Recommendations have been proposed
Khaoulani, Sohayb. "Traitement d'eaux usées par adsorption sur des polymères de cyclodextrine et développement de capteurs chimiques à base de membranes de verres de chalcogénures destinées à la détection des ions Hg²⁺". Thesis, Littoral, 2015. http://www.theses.fr/2015DUNK0386/document.
Texto completoThe aim of this work was to identify the emerging pollutants in the effluents of wastewater treatment plants as well as in the natural environment, and to propose a method of remediation and monitoring of these pollutants. In the first part of the thesis, we have identified the organic pollutants contained in the wastewater samples using (i) gas and/or liquid chromatography coupled with a mass spectrometry, (ii) static-headspace gas chromatography, and (iii) inductively coupled plasma atomic emission spectroscopy. Different pollutants were found such as phthalates, drugs, cholesterol, and heavy metal traces. In order to trap these pollutants, various water soluble/insoluble cyclodextrin β-CD polymers have been synthesized and their adsorption capacities were evaluated. After the analysis of the effluent samples, we observed a decrease of the Total Organic Carbon (TOC). This decrease was attributed to the adsorption of pollutant by CD polymers which have proven to be effective adsorbents. The second part of the thesis included two main sub-parts : (i) a synthesis and characterization part and (ii) an application part. In the first sub-part, chalcogenide glasses in the pseudo-ternary Agl-HgS-As₂S₃ system have been synthesized by adding silver iodide "Agl" to the quasi-binary HgS-As₂S₃ system. The vitreous domain and the macroscopic properties of glass samples were determined. Electrical conductivity of glasses was studied using both the complex impedance spectroscopy and resistivity measurements ; it was found that adding Agl to the quasi-binary HgS-As₂S₃ alloy causes an increase in the ionic conductivity. Structural studies, using various techniques as Raman spectroscopy, neutron scattering and high-energy X-ray diffraction, have been performed in order to decipher the relation between both structural and transport properties in these glasses. In the second sub-part, the obtained glasses in the ternary system were used as membranes in chemical sensors dedicated to mercury detection in aqueous solution. As a result, various sensors with different compositions were tested to determine their corresponding sensitivity, detection limit and selectivity coefficients in the presence of interfering ions