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Dispersion Active En Milieux Poreux Heterogenes Contamines Par Des Produits Hydrocarbones
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Book Synopsis Dispersion active en milieux poreux hétérogènes contaminés par des produits hydrocarbonés by : Adrienne Yra
Download or read book Dispersion active en milieux poreux hétérogènes contaminés par des produits hydrocarbonés written by Adrienne Yra and published by . This book was released on 2006 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail présenté concerne le problème de dissolution d'un solvant partiellement miscible dans l'eau (connu sous l'anglicisme NAPLs) dans un milieu poreux hétérogène. Il comprend trois chapitres. Le premier chapitre est une introduction générale à la problématique de la thèse. Après une présentation du problème de la pollution des eaux souterraines et de la physique des milieux poreux, le chapitre est consacré aux pollutions par les NAPLs. Une étude bibliographique présente la problématique de la modélisation de la dissolution de la phase NAPL piègée en mettant un accent sur les aspects multi-échelles et de l'hypothèse d'équilibre local et de non équilibre local. L'effet des hétérogénéités du milieu poreux, qui fait l'objet de peu de contributions dans la littérature, reste un problème très ouvert qui constitue l'objectif de la thèse : une première approche de ce problème est basée sur une réalisation d'expériences à l'échelle du laboratoire, en utilisant un outil de mesure de saturation qui permet de déterminer le champ de saturation interne au milieu poreux, ainsi qu'un suivi de la coube d'élution par chromatographie en phase gazeuse. Un chapitre est consacré à l'analyse numérique des résultats expériemntaux.
Book Synopsis Dispersion dans un aquifère contaminé par des hydrocarbures by : Anne Aigueperse
Download or read book Dispersion dans un aquifère contaminé par des hydrocarbures written by Anne Aigueperse and published by . This book was released on 1998 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA POLLUTION DES NAPPES PHREATIQUES PAR DES PRODUITS HYDROCARBONES MET EN UVRE UN TYPE DE DISPERSION PARTICULIER DU FAIT DU PIEGEAGE DE LA PHASE LIQUIDE NON AQUEUSE (PLNA). CE MODE DE TRANSPORT EST DECRIT DANS UNE EQUATION MACROSCOPIQUE DE DISPERSION ACTIVE QUI FAIT APPARAITRE DES TERMES SUPPLEMENTAIRES. LES COEFFICIENTS DE CETTE EQUATION SONT OBTENUS APRES AVOIR RESOLU DEUX PROBLEMES DE FERMETURE SUR DES CELLULES UNITAIRES REPRESENTATIVES DU MILIEUX POREUX CONTENANT DES BULLES DE POLLUANT RESIDUEL. LE TRAVAIL DE THESE A CONSISTE, D'UNE PART, A RESOUDRE NUMERIQUEMENT CES PROBLEMES AFIN DE CALCULER LES PROPRIETES DE TRANSPORT DANS L'EQUATION DE DISPERSION ACTIVE, ET, D'AUTRE PART, A ETUDIER L'INFLUENCE DES DIVERS PARAMETRES GEOMETRIQUES ET PHYSIQUES SUR CES PROPRIETES. L'IMPLEMENTATION DES CALCULS DES COEFFICIENTS DE TRANSPORT AU CAS TRIDIMENSIONNEL AVEC UNE METHODE AUX VOLUMES FINIS A ETE REALISEE. DE MANIERE ORIGINALE, CES PROBLEMES ONT ETE EGALEMENT RESOLUS SUR DES RESEAUX PLUS COMPLEXES REPRESENTANT LE MILIEU POREUX SOUS LA FORME DE SPHERES ET DE CYLINDRES DISPOSES ET CONNECTES DE FACON ALEATOIRE. L'ETUDE DE CES COEFFICIENTS, SUR DIFFERENTES CELLULES (ORDONNEES, ALEATOIRES PUIS TRIDIMENSIONNELLES), A CONDUIT A UNE MEILLEURE COMPREHENSION DE LEUR STRUCTURE VIS A VIS DES PARAMETRES DU MILIEU ET DE L'ECOULEMENT.
Book Synopsis Dispersion de solutés réactifs en milieux poreux chimiquement hétérogènes by : Safia Semra
Download or read book Dispersion de solutés réactifs en milieux poreux chimiquement hétérogènes written by Safia Semra and published by . This book was released on 2003 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée à l'étude du rôle de l'hétérogénéité chimique dans le transport de solutés interactifs en milieux poreux saturés. Il s'agit plus précisément de mettre en évidence l'augmentation de la dispersion d'un traceur linéairement interactif par rapport à la dispersion du traceur de l'eau. La méthodologie expérimentale consiste au traçage à l'échelle chromatographique de milieux modèles chimiquement hétérogènes. Ces milieux, de sont constitués de deux phases solides : des grains inertes, et des grains imprégnés de phase active dispersés uniformément parmi les premiers. L'hétérogénéité chimique dépend de leur proportion en nombre dans le milieu. Plus ils sont nombreux, moins le milieu est hétérogène. Les résultats expérimentaux montrent que pour un comportement hydrodynamique similaire, la dispersion du traceur réactif est différente de la dispersion hydrodynamique, mais n'en est pas découplée. Elle augmente linéairement avec l'échelle de l'hétérogénéité chimique. Les termes dans la dispersion globale, dus respectivement à l'hétérogénéité et à la cinétique de transfert sont découplés et simplement additifs. L'approche de modélisation des mélangeurs en cascade a été appliquée au transport en milieux hétérogènes. La taille d'un mélangeur qui détermine la valeur du coefficient de dispersion du réactif est supérieure à la taille d'un mélangeur dans le cas du transport de l'eau. Les résultats obtenus par le modèle sont très cohérents avec les constatations expérimentales.
Book Synopsis Dispersion en milieux poreux hétérogènes by : Constantin Moutsopoulos
Download or read book Dispersion en milieux poreux hétérogènes written by Constantin Moutsopoulos and published by . This book was released on 1993 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE TRANSFERT DE MASSE D'UN CONTAMINANT PASSIF (CAS DU TRACEUR) DANS UN MILIEU POREUX HETEROGENE CONSTITUE PAR DES INCLUSIONS SPHERIQUES IMPERMEABLES DE MEME DIAMETRE, REPARTIES DE FACON STATIONNAIRE, ALEATOIRE ET STATISTIQUEMENT HOMOGENE DANS UNE MATRICE POREUSE UNIFORME, EST ETUDIE THEORIQUEMENT. LA DIFFUSIVITE LONGITUDINALE EFFECTIVE EST CALCULEE POUR LES TEMPS LONGS, EN METTANT EN UVRE LA METHODE GENERALE PROPOSEE PAR BATCHELOR ET HINCH, POUR L'ETUDE DES SUSPENSIONS DILUEES. DANS LE CAS DES NOMBRES DE PECLET ELEVES ET DES FAIBLES CONCENTRATIONS VOLUMIQUES EN INCLUSIONS, LA DISPERSION MECANIQUE EST PROPORTIONNELLE AU PECLET ET VARIE DE FACON NON LINEAIRE AVEC LA CONCENTRATION VOLUMIQUE. EN VUE DE PROCEDER A LA VALIDATION DE CES RESULTATS, UNE INSTALLATION EXPERIMENTALE A ETE REALISEE ET UNE SERIE DE TESTS DE QUALIFICATION EFFECTUES
Book Synopsis DNAPL Site Evaluation by : James W. Mercer
Download or read book DNAPL Site Evaluation written by James W. Mercer and published by CRC-Press. This book was released on 1993-04-29 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: DNAPL Site Evaluation covers long-term contamination of ground water by DNAPL (dense non-aqueous phase liquids) chemicals. The book develops a framework for planning and implementing DNAPL site characterization activities. It provides detailed methods to identify, characterize, and monitor sites and analyzes their utility, limitations, risks, availability, and cost. Methods to interpret contaminant fate and transport are identified, and new site characterization methods are assessed. DNAPL Site Evaluation will maximize the cost-effectiveness of site investigation/remediation by providing the best information available to describe and evaluate methods to be used for determining the presence, fate, and transport of subsurface DNAPL contamination. The book will be a useful reference for groundwater professionals and environmental regulatory personnel.
Book Synopsis Soils and Sediments by : Helene Paquet
Download or read book Soils and Sediments written by Helene Paquet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays and soils are of great importance in various scientific fields, such as agriculture and environmental science, and in mineral deposits. Students and close collaborators of Georges Millot, the eminent French clay sedimentologist, have put together a book with topics ranging from weathering processes and diagenetic evalution of sediments to sedimentary mineral deposits. The book is of interest to practitioners, advanced students as well as teachers in the above fields.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Solid/ Liquid Separation by : Stephen Tarleton
Download or read book Solid/ Liquid Separation written by Stephen Tarleton and published by Elsevier. This book was released on 2005-09-26 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid/fluid separation is a major element in the processes performed in pharmaceutical, food, beverage, water, pulp and paper industries. Several books now exist on the more esoteric aspects of the techniques, but accounts of the fundemental principles involved are few. Written by two well-known chemical engineers, this book reviews the scientific and engineering bases for solid/fluid separation processes in an approachable style. Coverage focuses on fluid dynamics, gravity, centrifugal and membrane separations, filter cake formation, de-liquoring and washing. Complete with an extensive bibliography to allow readers to pursue topics in greater depth. - Help readers to understand how filtration processes work - Facilitate the application of knowledge to start-up and existing processes, helping readers to improve process performance - Help ensure your equipment is appropriate for its purpose and is working optimally, saving time and money
Download or read book Remediation Case Studies written by and published by . This book was released on 1995 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Underground Disposal of Radioactive Wastes by : International Atomic Energy Agency
Download or read book Underground Disposal of Radioactive Wastes written by International Atomic Energy Agency and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid/Liquid Separation: Equipment Selection and Process Design by : Steve Tarleton
Download or read book Solid/Liquid Separation: Equipment Selection and Process Design written by Steve Tarleton and published by Elsevier. This book was released on 2006-12-07 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, the third in a set specifically written for the industrial process and chemical engineer, the authors provide the detailed information on filtration equipment and media which allows the reader to then consider the pre-treatment of suspensions, selection of the most appropriate equipment for the task, data analysis and the subsequent design of the processes involved for particular separations. The result is a comprehensive book which is designed to be used frequently and referred to regularly in order to achieve better industrial separations.Successful industrial-scale separation of solids from liquids requires not only a thorough understanding of the principles involved, but also an appreciation of which equipment to use for best effect, and a start-to-finish plan for the various processes involved in the operation. If these factors are all correct, then successful separations should result. - Part of 3-volume set - Unique approach to industrial separations - Internationally-known authors
Book Synopsis Environmental Soil Remediation and Rehabilitation by : Eric D. van Hullebusch
Download or read book Environmental Soil Remediation and Rehabilitation written by Eric D. van Hullebusch and published by Springer Nature. This book was released on 2020-04-22 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of innovative remediation techniques and strategies for soils contaminated by heavy metals or organic compounds (e.g. petroleum hydrocarbons, NAPLs and chlorinated organic compounds). It discusses various novel chemical remediation approaches (in-situ and ex-situ) used alone and in combination with physical and/or thermal treatment. Further, it addresses the recovery of NAPLs, reuse of leaching solutions, and in-situ chemical reduction and oxidation, and explores the chemical enhancement of physical NAPLs recovery from both practical and theoretical perspectives. Also presenting the state-of-the-art in waste-assisted bioremediation to improve soil quality and the remediation of petroleum hydrocarbons, the book is a valuable resource for students, researchers and R&D professionals in industry engaged in the treatment of contaminated soils.
Download or read book Activated Carbon written by Harry Marsh and published by Elsevier. This book was released on 2006-07-12 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen an expansion in speciality uses of activated carbons including medicine, filtration, and the purification of liquids and gaseous media. Much of current research and information surrounding the nature and use of activated carbon is scattered throughout various literature, which has created the need for an up-to-date comprehensive and integrated review reference. In this book, special attention is paid to porosities in all forms of carbon, and to the modern-day materials which use activated carbons - including fibres, clothes, felts and monoliths. In addition, the use of activated carbon in its granular and powder forms to facilitate usage in liquid and gaseous media is explored. Activated Carbon will make essential reading for Material Scientists, Chemists and Engineers in academia and industry. - Characterization of porosity - The surface chemistry of the carbons - Methods of activation and mechanisms of adsorptio - Computer modelling of structure and porosity within carbons - Modern instrumental analytical methods
Book Synopsis Faecal Sludge Management by : Linda Strande
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Book Synopsis Management of Radioactive Wastes from the Nuclear Fuel Cycle by :
Download or read book Management of Radioactive Wastes from the Nuclear Fuel Cycle written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis How to Effectively Recover Free Product at Leaking Underground Storage Tank Sites by :
Download or read book How to Effectively Recover Free Product at Leaking Underground Storage Tank Sites written by and published by . This book was released on 1996 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
