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Статті в журналах з теми "Matériaux dangereux":
Lanone, Sophie, and Jorge Boczkowski. "Les nanomatériaux sont-ils dangereux pour notre santé ?" Questions de santé publique, no. 10 (September 2010): 1–4. http://dx.doi.org/10.1051/qsp/2010010.
El Maghri, Sanaa, Samia Yousfi, Hicham Essallaki, and Mouna Latifa Bouamrani. "Étude de l’effet de l’ajout des déchets de marbre sur les propriétés du béton à base de granulats de briques recyclés (GBR)." Matériaux & Techniques 110, no. 5 (2022): 502. http://dx.doi.org/10.1051/mattech/2022032.
McMurray, James. "The Ends of Consent." Social Anthropology/Anthropologie Sociale 32, no. 2 (June 1, 2024): 57–72. http://dx.doi.org/10.3167/saas.2024.320205.
Crolet, Jean-Louis. "Detailed mechanisms of hydrogen charging and hydrogen stress cracking of steel in liquid ammonia storage." Matériaux & Techniques 107, no. 4 (2019): 402. http://dx.doi.org/10.1051/mattech/2019023.
Cordeiro, Robson Costa. "Heidegger e a poesia como caminho para a linguagem." Pensando - Revista de Filosofia 7, no. 14 (July 4, 2016): 247. http://dx.doi.org/10.26694/pensando.v7i14.5022.
Rosa, Márcio, Vanusca Dalosto Jahno, and Patrice Monteiro de Aquim. "VALORIZAÇÃO DOS PRODUTOS ORIUNDOS DO RESÍDUO DE COURO WET-BLUE HIDROLISADO." Revista Tecnologia e Tendências 11, no. 1 (September 15, 2020): 90. http://dx.doi.org/10.25112/rtt.v11i1.2280.
Muller, Aurelia Marine, Claudia Thurnherr, and Daniel Algernon. "Intégration d’un système CND Impact Echo sur un drone." e-journal of nondestructive testing 28, no. 9 (September 2023). http://dx.doi.org/10.58286/28518.
Torres de Cerqueira, Rafael, and Ceci Vilar Noronha. "ESCRITO EM VERMELHO: a construção do discurso sobre criminalidade e linchamento no jornal." Caderno CRH 19, no. 47 (November 23, 2006). http://dx.doi.org/10.9771/ccrh.v19i47.18756.
Paes Machado, Eduardo, and Ana Márcia Duarte Nascimento. "VÍTIMAS À DERIVA: processos sociais de vitimização de bancários por assaltos e seqüestros." Caderno CRH 19, no. 47 (November 23, 2006). http://dx.doi.org/10.9771/ccrh.v19i47.18754.
Дисертації з теми "Matériaux dangereux":
Mellak, Abderrahmane. "Faisabilité des coulis de ciment saumurés et microsilicés adaptés aux formations salifères : application au domaine pétrolier et au stochage des déchets radioactifs." Université Robert Schuman (Strasbourg) (1971-2008), 1994. http://www.theses.fr/1995STR30004.
Ouimet, Nicole. "Etudes en vue de la mise au point d'une chaîne de traitements de matériaux souillés par des goudrons issus de la pyrolyse de la houille." Lyon, INSA, 1996. http://www.theses.fr/1996ISAL0047.
France, as all industrialized countries, has on its territory many potentially contaminated sites containing coal-tar materials from past industrial activities. Specific remediation technologies have been developed, mainly in North America. Existing treatment technologies include thermal processes (incineration, desorption, vapor extraction. . . ), physical methods (such as solidification/stabilization, vitrification. . . ), chemical methods (extraction, washing) and biological processes to a lower extent. A non-destructive remediation process has been developed here to reduce the overall mass of contaminated materials to be incinerated. In a first step, laboratory feasibility studies have been conducted on coal-tar contaminated rubbles. A specific extraction-washing treatment chain has been developed, with the selection of an appropriate organic solvent for the extraction phase and a detergent for the washing phase of the process. Laboratory results being promising, the next step was to test the process at the pilot and industrial scales. Approximately 600 m3 of coal-tar contaminated rubbles from a mixture of various demolition materials were treated. The process included complete excavation of the rubbles contaminated with coal tar, contaminant extraction and washing to achieve specified cleanup levels for organic contaminants. Hence the extraction-washing process was able to significantly diminish most of the contamination associated with PAH, phenols, inorganic nitrogen compounds and total cyanides in the rubbles. Furthermore, the industrial scale data showed a significant total mass reduction of contaminated materials to be incinerated since the treated rubbles were disposed off on the site. In the third step of our study, experiments at the laboratory-scale were conducted in order to improve the process and reduce the amount of byproducts generated during treatment and requiring offsite disposal. Studies were performed on the biological treatment of the waste water containing complex organic pollutants such as phenolic compounds, on the mass reduction of wastes smaller than 10 mm with screening tests, and on the solidification/stabilization trials of other solid contaminated byproducts. The process should be now tested on other sites with rubbles contaminated with coal-tar having different physico-chemical characteristics
Hammoud, Ola. "Caractérisation, prétraitement et valorisation dans un béton prêt à l'emploi de Mâchefers d'Incinération de Déchets Non Dangereux (MIDND)." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI039.
Valorisation of Municipal Solid Waste Incineration Bottom Ash (MSWI-BA) in building materials in order to reduce their expansive storage in technical burying center and preserve the natural ressources constitutes a challenge. A hindrance of this valorisation is the pollutant potential of metals (especially mineral traces elements MTE) and anions likely to be released in use scenarios. This thesis evaluates the impact of incorporation of MSWI-BA into ready-mix concrete formulation. It helps to improve the understanding of MTE and anions behaviour in different leaching conditions and to find adequate solutions to limit their mobility. The first part presents the technical and environmental performances of ready-mix concrete formulated by partially replacing of the natural aggregates with different size fractions of BA incorporated at different substitution rates. The results demonstrate that the environmental performances of the scenario comply with the regulatory requirements of the Netherlands. On the other hand, the compressive strength is reduced by half compared to the standard formulation. Pretreatment of MSWI-BA could improve the mechanical performances. The second part describes the influence of thermal and chemical pretreatments on the mobility of MTE. The results show that the efficiency of the thermal treatment depends on the temperature and the target element. Optimised chemical treatment used in this study appears to be more effective. The third part, dedicated to the geochemical modeling of BA behaviour in leaching scenarios, allowed us to identify the mineralogical phases that control the mobility of MTE. It shows that the majority phases impose the parameters of the solution such as the pH and consequently, influences on the release of the MTE. This knowledge facilitates the definition of the possible pretreatments to be applied on the MSWI-BA before its valorisation
Barbalho, Thiago Jobson. "Ρrοblems, mοdels and methοds fοr risk reductiοn after industrial disasters invοlving dangerοus substances". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH02.
In Europe, more than 250 major accidents involving industrial sites under the Seveso Directive have been reported since 2010. Despite regulations in place to prevent such accidents and minimize their impact, managing risk after these disasters remains a complex challenge. Once an industrial disaster occurs, preliminary on-the-ground information is collected to determine the extent of the accident, and operational decisions need to be made based on the hazardous nature of the products involved and the extent of the affected area. In this thesis, we delve into the realm of complex scheduling problems closely linked to risk factors arising from the treatment (cleaning or neutralizing) of hazardous substances accidentally released by industrial sources. The primary objective is to develop effective optimization models and solutions addressing the challenges faced by industries and logistical operations. We propose new optimization problems to establish a framework for scheduling on-site operations to either clean or neutralize potential hazards. We present mathematical formulations and an Iterated Local Search metaheuristic. The methods were applied to solve various problem scenarios, and we investigate their numerical results and their applicability to realistic situations
Minane, Jacques Rémy. "Contribution à l’élaboration de sables de mâchefers améliorés en vue d’une valorisation dans la formulation de matériaux cimentaires." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10133/document.
This doctoral study focuses on granular mineral wastes from municipal solid waste incineration (MSWI) bottom ash. This research is aiming to elaborate upgraded mineral sands fractions in comparison to standard MSWI bottom ash thanks to its beneficial use in cementitious materials. In the first step, a new methodology is proposed for dry separation of MSWI bottom ash in order to better recover ferrous and non-ferrous metals from the sands fractions and obtain an improved mineral sand fraction at the same time. This proposed methodology is composed of grinding of 0-20 mm input bottom ash fraction through BHS crushers. Subsequently, the main sand fraction (0-4 mm) is processed through magnetic drums and the innovative non-ferrous metal separator NES 4T of STEINERT process. In the second step, physical, chemical, mineralogical and environmental characterizations have been performed on untreated and treated sands fractions. The third step of this research focuses on beneficial use of the 0-2 mm granular fraction in cementitious materials, that is considered most problematic of MSWI bottom ash fractions. The standardized reference sand is replaced in volume for the partial substitution (50% and 75%) and total substitution (100%) by 0-2 mm upgraded mineral fractions in the mortar preparation. Physical, mechanical and environmental characterization have been performed on cement mortar up to 180 days of moist curing. Compressive strengths of mortar containing upgraded bottom ash are promising. Finally, a mechanical characterization on hardened cement paste has been performed as well on mortar containing upgraded bottom ash fractions through indentation technique in order to determine the modulus of elasticity and hardness
Le, Rouzic Mathieu. "Étude des propriétés physico-chimiques et mécaniques des matériaux cimentaires à base d’oxyde de magnésium." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1082/document.
Magnesium phosphate cements are the most representative cements of the activated-by-acid cements family. Despite the fact that they are known since the early 20th century, their use in civil engineering is fairly limited. These materials are used for road repairs where the fast compressive strength development is an advantage. Recently they have also been used in wastes stabilization/solidification (S/S), especially with wastes incompatible with Portland cement. The challenges of the use of these cements are related to the nature of their formation reaction: fast, very exothermic, with a very short setting time (only a few minutes).The bonding phase, k-struvite (MgKPO4.6H2O), is obtained from magnesium oxide mixed in water with monopotassium phosphate (KH2PO4).MgO + KH2PO4 + 5H2O MgKPO4.6H2OThe setting mechanisms are still poorly known and various theories, involving or not secondary product formation, have been suggested. Our researches have aimed to understand the setting mechanisms, as well as the influence of the formulation parameters on the properties of the magnesium phosphate cement. Results show that the formation of k-struvite involved a precipitation-dissolution reaction of an intermediate product, the newberyite (MgHPO4.3H2O). Formation reactions of these two products are controlled by the supersaturation rate and the pH of the solution. The study highlights the strong effect of water on the properties of fresh cement paste. With a low mass ratio e/c in comparison of Portland cement (ratio e/c between 0,1 and 0,25), a slight modification of the ratio (0,02) leads to a segregation and a surface heterogeneity of the cement paste. Among the formulation parameters, the molar ratio MgO/KH2PO4 (Mg/P) seems the most important parameter. Indeed, it impacts most of the properties of the magnesium phosphate cement (compressive strength, setting time, reaction heat, paste fluidity …). Low Mg/P ratios lead to poor water resistance, to crystals formation inside the microstructure that can be seen on the surface of the sample (an efflorescence appearance), and to important swelling of the paste, leading to the cracking of the samples. After the parametric study, a magnesium phosphate cement paste has been defined. Dimensional changes and chemical shrinkage measurement were conducted to understand the mechanisms involved in this swelling phenomenon. In support, microstructural analyses (SEM, XRD, TGA) and leaching tests complete the experimental campaign. The results confirm the influence of a low Mg/P ratio on cement swelling and water resistance. Finally, a study on various additions to the paste has been conducted, with the purpose of improving the cement paste performances. It shows that the addition of an inert filler (siliceous sand or fly ashes) has a retarding effect and reduced the reaction heat
Boucard, Linda. "Etude experimentale : valorisation de sediments fluviaux stabilises." Ecole Centrale de Lille, 2006. http://www.theses.fr/2006ECLI0002.
The river transport is a major stake for the development of the human societies. It generates employment, unblocks the road traffic and contributes to the sustainable development. The silting of the inland waterways makes necessary and compulsory their maintenance. The absence of clearing out of the sediments accentuates the risks of flood, involves a river traffic restraint going until the complete inactivity of certain water ways, causing deviations and the fall of competitivity for a whole sector. The extraction of the sediments is not systematic because it raises problems of an ecological, political and financial nature. The important volume of sediments polluted (heavy metals, organic matter. . . ) to dredge requires an assumption of responsibility, currently, unsuitable or non-existent. Our samples were treated so that heavy metals are stabilized there. After a study of the various solutions and existing treatments, we worked in partnership with the company SOLVAY which developed the chemical process NOVOSOL® based on phosphoric acid. The valorisation of these new stabilized products was the objective of this work of thesis. After an environmental and mineral characterization of the sediments before and after treatment, we worked out and characterized new building materials containing stabilized river sediments. The applications were limited to compressed elements and concretes. These first tracks of valorisation offer attractive and evolutionary prospects thanks to the acquired lesson, with the improvement of methodology, a better control of materials and of their implementation
Antoun, Marc. "Vers une meilleure compatibilité ciment/mâchefer (MIDND) dans la formulation de matériaux cimentaires intégrant un ciment sulfo-alumineux." Thesis, Ecole nationale supérieure Mines-Télécom Lille Douai, 2019. http://www.theses.fr/2019MTLD0002.
In a world where circular economy and the valorization of raw materials is taking a greater importance, municipal solid waste incineration (MSWI) bottom ash is identified as potentially renewable resource in the construction field and more specifically in cementitious materials like mortar and concrete. Given the origin of the bottom ash and in order to have a better cement/MSWI bottom ash compatibility, the fraction used was as refined as possible by removing ferrous, non-ferrous and unwanted materials. The choice of the cement used is a critical factor as well because it affects the quality of the end product since MSWI bottom ash has particular physicochemical properties. The work in this PhD studies the advantages of using a sulfo-aluminate cement to valorize an improved 0/2 mm fraction of bottom ash that has been developed to be used in cementitious matrices. The first part presents the results of the mortar sample mixes containing bottom ash in a substitution by volume of the standard sand. To better highlight the effect of using a sulfo-aluminate (CSA), CSA mortars containing bottom ash were compared to a Portland cement (OPC) mortars, with substitution rates of 25 %, 50 %, 75 % and 100 % were used. A study of the porosity was then conducted at 90 days ; it shows that the pores larger to 50 nm are remarkably less present for CSA mortars. This thesis brings forward a major and innovative result : the level of alkalinity of the mortar plays an important role in the release of hydrogen gas after mixing and before setting. The presence of these gases creates large porosity in the hardened mortar samples. The second part studies the physical and microstructural aspects of the mortars after being immersed in aggressive environments : pure water and sulfate solution. The substitution rates used in this experiment were 50 % and 100 % by volume as well as the reference mortars with no bottom ash. These samples were then studied in the SEM which showed that CSA/bottom ash mortars were clearly less affected than the OPC/bottom ash mortars. This was highlighted by the porosity, the cracking and the depth of degraded zone
Sow, Libasse. "Approche couplée expérimentation - modélisation multi-échelle pour la détermination du comportement mécanique des graves routières traitées aux liants : Application à la valorisation des Mâchefers d'Incinération de Déchêts Non Dangereux." Thesis, Rennes, INSA, 2018. http://www.theses.fr/2018ISAR0001/document.
In this work, the feasibility of a valorisation in road engineering of non-hazardous waste incineration bottom ash aggregates (NHWI) is investigated. This study is first based on an experimental determination of the elastic properties of the bottom ash particles. These properties serve as input data for hierarchical multi-scale modelling developed to study the mechanical behaviour of aggregates treated with binders (cement and bitumen). The original experimental campaign on the bottom ash particles allowed them to be mapped to the Scanning Electron Microscope (SEM). For the particles, a mean reduced modulus of elasticity in between 15 and 68 GPa was found by means of indentation tests and applying the "Olivier and Phan method. The chemical analysis of the aggregates was obtained using qualitative point chemical analyzes (OHS). Based on a 0/25 particle size distribution of NHWI, which was the subject of an experimental study [BEC 07] , we have implemented two 30 models < road materials treated with binders in Representative Elementary Volumes (REV). These models are based on a hierarchical multi-scale modelling strategy. Two types of binder are studied: cement CEM I 42.5 R and bitumen of [NGU 08]. For both types of binder, the treated aggregates we divided into two REV, at respectively the sub-mesoscale (0/6 mm) and the mesoscale (6/25 mm). An application to the valorisation of NHWI bottom ashes in road engineering is studied in both cases. With a 3% cement treatment, a numerical simulation campaign "Virtual Laboratory" was conducted. At the sub-mesoscale, the input parameters for the Concrete Damaged Plasticity Model used at the mesoscale are determined. At the mesoscale, the mechanical characteristics of the road materials usually determined through experiments have been found. The developed simulation strategy has been validated by comparing our numerical results and son experimental results of [BEC 07]. With a 5% bitumen treatment, stress relaxation tests carried out at the two scales enable one to obtain the thermo-rheological properties of the Bitumen Bound Gravel. These properties are the Prony series at a reference temperature of 0°C and the Williams-Landei- Ferry (WLF) law constants. Prony series are obtained by means of standardized elastic moduli. The obtained WLF law constants are Cl = 20 °C-1 and C2 = 130 °C. The numeric simulations have been validated by comparing the responses of heterogeneous and corresponding homogeneous materials
Ngenda, Banka Richard. "Etude de valorisation des rejets des usines à zinc de Kolwezi, République démocratique du Congo." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210144.
A l’aide des techniques modernes de caractérisation (physico–chimique, minéralogique et morphologique), nous sommes arrivés à cibler, à adapter et à justifier l’utilisation d’une technique de valorisation des matières minérales existantes. Les minéraux utiles contenus dans les rejets UZK ont été sulfatés par digestion et sélectivement mis en solution après un grillage. La sulfatation s’est avérée l’étape déterminante du procédé et un intérêt particulier a été focalisé sur cette étape en réalisant une étude cinétique approfondie.
Les données et informations récoltées tout le long de cette recherche nous ont permis de réaliser une simulation du procédé par le logiciel ASPEN PLUS. Ce qui a permis de faire une ébauche d’un schéma de traitement industriel. Ce dernier s’est avéré souple vis-à-vis de l’utilisation d’autres matières comme les calcines des concentrés sulfurés cuivre-zinc.
Residues from the Kolwezi Zinc Plant (Usines à Zinc de Kolwezi UZK) essentially contain zinc in a refractory (ferrite) form, which is difficult to recover by conventional hydrometallurgical methods. « Heavy» metals are also present that make them hazardous towards the environment in which they are currently stored. Most of these metals are valuable; thus, the UZK residues are a real secondary deposit. It is therefore imperative to develop an appropriate method of treatment, hence the theme of the present thesis: « Recovery study of values metals from Kolwezi Zinc Plant residues, DRC ».
Using modern techniques of characterization (physical and chemical, mineralogical and morphological), we focused, adapted and justified the use of a technique for efficient recovery of the existing valuable minerals. The minerals contained in UZK residues have been sulphated by digestion and thereafter selectively dissolved after roasting. Sulphatation proved to be the decisive step of the process and a particular attention has been given to this step by performing a detailed kinetic study.
The data and information collected throughout this research allowed a simulation of the developed method by using the « Aspen Plus » software. This allowed us to propose a draft scheme of industrial processing. The latter proved flexible towards the use of other materials such as calcines of copper-zinc sulphide concentrates.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Книги з теми "Matériaux dangereux":
Canada. Dept. of National Defence., Canada Environment Canada, Canada Health Canada, Canada. Indian and Northern Affairs Canada., Macleod Institute for Environmental Analysis., Environmental Management Solutions (EMS) Inc., Canada. Ministère de la défense nationale., Canada. Ministère des Affaires Indiennes et du Nord., Canada Environnement Canada, and Canada Santé Canada, eds. The technical feasibility of landfilling PCB-amended painted materials : 1999 workshop proceedings =: Faisabilité technique de la mise en décharge contrôlée de matériaux enduits de peintures contenant de BPC : compte rendu de l'atelier de 1999. Ottawa, Ont: Government of Canada = Gouvernement du Canada, 2000.
Canada. Dept. of National Defence., Canada Environment Canada, Canada. Indian and Northern Affairs Canada., Environmental Management Solutions (EMS) Inc., Canada. Ministère de la défense nationale., Canada Environnement Canada, and Canada. Ministère des affaires indiennes et du Nord Canadien., eds. The technical feasibility of landfilling PCB-amended painted materials : workshop proceedings synopsis =: La faisabilité technique de mise en décharge contrôlée de matériaux enduits de peintures contenant des BPC : compte rendu abrégé de l'atelier. Ottawa, Ont: Government of Canada = Gouvernement du Canada, 1998.
Ontario. Ministère du travail. Division des opérations. Règlement concernant système d'information sur les matériaux dangereux utilisés au travail (SIMDUT), pris en application de la Loi sur la santé et la sécurité au travail: L.R.O. de 1990, chap. O.1 tel que modifié Réglement de l'Ontario 356/91 et modifiant le Règl. 36/93. Toronto, Ont: Ministère du travail, 1993.
IAEA. Behaviours of Cementitious Materials in Long Term Storage and Disposal of Radioactive Waste - Results of a Coordinated Research Project: IAEA Tecdoc Series No. 1701. International Atomic Energy Agency, 2013.
Bergeron, Kenneth D. Tritium on Ice: The Dangerous New Alliance of Nuclear Weapons and Nuclear Power. MIT Press, 2004.
Bergeron, Kenneth D. Tritium on Ice: The Dangerous New Alliance of Nuclear Weapons and Nuclear Power. The MIT Press, 2002.
Bergeron, Kenneth D. Tritium on Ice: The Dangerous New Alliance of Nuclear Weapons and Nuclear Power. The MIT Press, 2004.
(Editor), Vladimir M. Kolodkin, and Wolfgang Ruck (Editor), eds. Ecological Risks Associated with the Destruction of Chemical Weapons (NATO Security through Science Series / NATO Security through Science Series C: Environmental Security). Springer, 2006.
Частини книг з теми "Matériaux dangereux":
TOUZE, Nathalie. "Fonctions barrière et drainage : installations de stockage de déchets non dangereux et ouvrages hydrauliques." In Les géosynthétiques d’hier à aujourd’hui, 117–49. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.8175.ch4.