Download or read book Elimination de pesticides sur charbon actif en grains CAG written by Valérie Perrin-Delhumeau and published by . This book was released on 2000 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elimination de pesticides sur lit de charbon actif en grain en pr sence de mati re organique naturelle written by Stéphane Baup and published by . This book was released on 2000 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: FACE A LA POLLUTION PERSISTANTE DES EAUX NATURELLES PAR LES PESTICIDES, LE CHARBON ACTIF EN GRAIN (CAG) REPRESENTE UNE REELLE POSSIBILITE DE TRAITEMENT, DE PLUS EN PLUS SOUVENT MIS EN UVRE EN POTABILISATION. L'EFFICACITE DE CE TRAITEMENT DEPEND DES EQUILIBRES ET DES CINETIQUES D'ADSORPTION, DE L'HYDRODYNAMIQUE DU REACTEUR ET DE LA COMPETITION AVEC LA MATIERE ORGANIQUE NATURELLE CONTENUE DANS LES EAUX BRUTES DESTINEES A LA POTABILISATION. DANS CE CADRE, L'OBJECTIF DE CETTE RECHERCHE EST DOUBLE : ELABORER UN PROTOCOLE D'ACQUISITION DES PARAMETRES D'EQUILIBRE ET DE CINETIQUE D'ADSORPTION COMPETITIVE ET CONCEVOIR UN LOGICIEL DE SIMULATION DE L'ADSORPTION SUR LIT DE CAG. L'APPROCHE THEORIQUE S'APPUIE SUR : (1) LE MODELE DE LA DIFFUSION DE SURFACE HOMOGENE (HSDM) QUI PREND EN COMPTE LE COEFFICIENT DE TRANSFERT DE MASSE EXTERNE (K F) ET LE COEFFICIENT DE DIFFUSION SUPERFICIELLE (D S) POUR MODELISER LA CINETIQUE D'ADSORPTION, (2) LA THEORIE DE LA SOLUTION ADSORBEE IDEALE (IAST) POUR MODELISER LA COMPETITION ET (3) L'INTRODUCTION D'UN COMPOSE FICTIF (EBC) QUI REPRESENTE LA MATIERE ORGANIQUE NATURELLE. LE TRAVAIL EXPERIMENTAL CONSISTE D'UNE PART A REALISER DES ISOTHERMES D'ADSORPTION SUR L'EAU ULTRA PURE, L'EAU REELLE ET L'EAU REELLE DILUEE PAR DE L'EAU ULTRA PURE AFIN D'OBTENIR LES PARAMETRES D'EQUILIBRE. D'AUTRE PART, DES CINETIQUES D'ADSORPTION, EFFECTUEES SUR COLONNE DIFFERENTIELLE D'ADSORPTION (DCBR), PERMETTENT D'ACQUERIR LES COEFFICIENTS DE DIFFUSION SUPERFICIELLE. LES PROGRAMMES DE SIMULATION ONT ETE CONCUS, ECRITS ET VALIDES SUR PLUSIEURS RESULTATS ISSUS DE LA LITTERATURE. CES PROGRAMMES ONT ENSUITE ETE IMPLIQUES DANS LE PROTOCOLE GLOBAL DE SIMULATION DU FILTRE DE CHARBON ACTIF EN GRAIN REEL. POUR UNE EAU NATURELLE, CE PROTOCOLE

Download or read book Elimination de pesticides par adsorption sur charbon actif en poudre et charbon actif en grains neuf written by Pascal Roche and published by . This book was released on 1996 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ELIMINATION PAR ADSORPTION SUR CHARBON ACTIF DES PESTICIDES CONTENUS DANS LES EAUX A POTABILISER written by LAURENCE.. GICQUEL and published by . This book was released on 1996 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: EN BRETAGNE, LA POLLUTION DES EAUX NATURELLES PAR LES PESTICIDES CONTRAINT LES TRAITEURS D'EAU POTABLE A L'UTILISATION DE PLUS EN PLUS FREQUENTE D'UN TRAITEMENT AU CHARBON ACTIF. L'EFFICACITE DE CE TRAITEMENT EST ETROITEMENT LIEE, ENTRE AUTRES, A LA PRESENCE DE MATIERES ORGANIQUES ET MINERALES DISSOUTES DANS LES EAUX A TRAITER. LORS DE NOTRE TRAVAIL, NOUS AVONS ETUDIE L'INFLUENCE DE CES MATIERES SUR L'ADSORPTION DE L'ATRAZINE PAR QUATRE CHARBONS ACTIFS, PARMI LES PLUS UTILISES DANS LES USINES DE POTABILISATION. LES EXPERIENCES SONT REALISEES AVEC CINQ EAUX NATURELLES PRELEVEES A DIFFERENTS STADES DE TRAITEMENT. L'ANALYSE DE L'ENSEMBLE DES RESULTATS EXPERIMENTAUX CONFIRME LE PHENOMENE DE COMPETITION ENTRE LES PESTICIDES ET LES DIFFERENTS COMPOSES PRESENTS EN SOLUTION. NOTRE ETUDE ATTIRE L'ATTENTION SUR LA COMPLEXITE DES INTERACTIONS MISES EN JEU. CELLES-CI DEPENDENT DE LA NATURE DU CHARBON, DE LA COMPOSITION ET DE LA TENEUR EN MATIERES ORGANIQUES ET MINERALES AINSI QUE DE LA CONCENTRATION INITIALE EN PESTICIDE. LA DEUXIEME PARTIE DE CETTE RECHERCHE, CONCERNE LA PREDICTION DES PERFORMANCES DES CHARBONS ACTIFS POUR L'ELIMINATION DES PESTICIDES EN EAU NATURELLE. EN CONSIDERANT LA MATRICE DES EAUX COMME UN COMPOSE UNIQUE, IL EST POSSIBLE D'EVALUER LA CAPACITE D'ADSORPTION DES CHARBONS SELON LA THEORIE DE LA SOLUTION ADSORBEE IDEALE. LES CARACTERISTIQUES D'ADSORPTION DU COMPOSE FICTIF SONT DETERMINEES SELON UN PROTOCOLE EXPERIMENTAL SIMPLE ET RAPIDE

Download or read book Adsorption et lectrosorption d herbicides et de tensioactifs sur charbons actifs en grains written by Ali Mohd and published by . This book was released on 1996 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL RELATIF A L'ADSORPTION ET L'ELECTROSORPTION (ADSORPTION SOUS POTENTIEL IMPOSE) DE POLLUANTS SUR CHARBONS ACTIFS EN GRAINS COMPORTE TROIS PARTIES : LA PREMIERE PARTIE A POUR BUT D'ETUDIER L'INFLUENCE SUR L'INTERACTION ADSORBAT-ADSORBANT DE LA NATURE PHYSIQUE ET CHIMIQUE DU CHARBON ACTIF. LES RESULTATS OBTENUS, PAR LES METHODES DE TITRAGE DE BOEHM, DE CHROMATOGRAPHIE GAZEUSE INVERSE ET D'UNE COMBINATION DE CES DEUX METHODES, ONT PERMIS D'IDENTIFIER SEPAREMENT L'EFFET SUR LES FORCES D'INTERACTION DE LA POROSITE ET DES GROUPEMENTS FONCTIONNELS. LA DEUXIEME PARTIE EST CONSACREE A L'ETUDE DE L'ADSORPTION D'HERBICIDES ET DE TENSIOACTIFS SUR CHARBON ACTIF EN GRAINS (CAG) EN REGIME DYNAMIQUE. LES RESULTATS OBTENUS MONTRENT QUE LA CAPACITE ET LA CINETIQUE D'ADSORPTION EN FLUX CONTINU SONT INFLUENCEES PAR LES PROPRIETES DE L'ADSORBAT ET CELLES DE L'ADSORBANT. LES PARAMETRES UTILISES SONT LA SOLUBILITE, LA CHARGE ET LA CONCENTRATION POUR LES SOLUTES, LA POROSITE ET LES PROPRIETES ACIDO-BASIQUES POUR L'ADSORBANT. LA CAPACITE D'ADSORPTION VARIE LINEAIREMENT AVEC LN T. LA DERNIERE PARTIE S'INTERESSE A L'ETUDE DE L'ELECTROSORPTION DE DEUX HERBICIDES ET DE TROIS TENSIOACTIFS. LES RESULTATS MONTRENT, POUR LES HERBICIDES ATRAZINE ET SIMAZINE, QUE L'APPLICATION D'UN POTENTIEL NEGATIF AU CAG AUGMENTE LEGEREMENT L'ADSORPTION TANDIS QU'UN POTENTIEL POSITIF DIMINUE NETTEMENT LA QUANTITE RETENUE. POUR LES TENSIOACTIFS ANIONIQUE (ABS) OU NON-IONIQUE (TRITON N-101), L'EFFET D'UN POTENTIEL APPLIQUE EST RELATIVEMENT FAIBLE ET DIFFICILE A INTERPRETER. POUR LE CDBAC, TENSIOACTIF CATIONIQUE, L'ALTERNANCE DE CYCLES POSITIFS ET NEGATIFS DONNE LIEU A UNE ELECTROSORPTION REVERSIBLE ET COMPRISE ENTRE 10 ET 15%.

Download or read book Drinking Water Treatment Chemical and Physical Elimination of Organic Substances and Particles written by Kader Gaid and published by John Wiley & Sons. This book was released on 2023-08-15 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, hundreds of millions of people drink contaminated water without knowing it. Yet water treatment technologies can effectively eliminate contamination and can supply urban and rural populations with safe drinking water in a secure way. For almost two centuries, the huge number of treatments available to guarantee water quality has grown alongside technological progress, the strengthening of industry norms and the reinforcement of consumer expectations. New treatment methods have been developed according to the advancement of knowledge and new sanitary regulations. This five-volume book sets out to clearly present the variety of treatments available along with their performance, limitations and conditions of use as well as ways to combine them to produce safe drinking water, which is a basic need essential to everyday life. The author shares his expertise acquired at Veolia, a company that is a world leader in water services and sanitation, desalination of sea water and the recycling of wastewater. Founded in France in 1853 to bring safe water to populations and to protect them from waterborne epidemics which ravaged cities, its history is intertwined with that of water treatment.

Download or read book Valorisation des d chets agroalimentaires noyaux des dattes Phoenix Dactylifera pour l limination des pesticides organochlor s des eaux contamin es written by Rayane Sahmarani and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail de thèse se développe dans le cadre d'un projet dont l'objectif général de proposer une approche innovante pour la dépollution des eaux contaminées par les pesticides organochlorés par une technique d'adsorption sur charbons actifs issus des noyaux des dattes (espèce : Phoenix dactylifera, types : Ajwa, Anbari et Khudri). Ensuite d'étudier la capacité de rétention de ces matériaux sur colonne en laboratoire avec des applications sur sites contaminés (effluents agricoles et rejets de la station d'épuration). La préparation de meilleurs charbons actifs à partir des noyaux de dattes par un procédé simple de pyrolyse précédé d'une imprégnation chimique à l'acide phosphorique. Le procédé sera optimisé sur la base de l'analyse du rendement massique et de l'indice d'iode. Plusieurs paramètres seront étudiés afin de déterminer les conditions optimales de l'adsorption tels que la dose du charbon actif, le pH de la solution, la concentration initiale des pesticides et le temps du contact, étant donné que la capacité d'adsorption d'un charbon actif dépend en partie de l'adéquation entre la dimension des pores et la dimension des molécules adsorbées, il s'avère donc indispensable d'optimiser la production du charbon actif.

Download or read book Recherche et dosage des pesticides pr sents dans l eau en vue de leur limination written by Rachdi Boussahel and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL A POUR OBJET LA MISE AU POINT, L'OPTIMISATION ET LA VALIDATION DE METHODES D'ANALYSE DES PESTICIDES PRESENTS DANS L'EAU AFIN D'EVALUER L'EFFICACITE DE CERTAINS TRAITEMENTS D'ELIMINATION DES CES MICROPOLLUANTS ORGANIQUES. LES RESULTATS OBTENUS MONTRENT : - L'INTERET D'UTILISER DE NOUVELLES TECHNIQUES D'EXTRACTION TELLES QUE L'EXTRACTION EN PHASE SOLIDE (SPE) OU LA MICROEXTRACTION EN PHASE SOLIDE (SPME) A LA PLACE DE LA TECHNIQUE CLASSIQUE D'EXTRACTION LIQUIDE - LIQUIDE (ELL) TANT DU POINT DE VUE ECONOMIE DE SOLVANT ET PROTECTION DE L'ENVIRONNEMENT QUE DE CELUI DE LA QUALITE DES RESULTATS, - QUE L'EFFICACITE DES METHODES D'ELIMINATION ETUDIEES A SAVOIR LA RETENTION MEMBRANAIRE (NANOFILTRATION), L'ADSORPTION SUR CHARBON ACTIF EN POUDRE ET LA REDUCTION PAR LE FER A LA VALENCE ZERO DEPEND DE LA NATURE CHIMIQUE DE LA MOLECULE DU PESTICIDE VISE ET DE LA COMPOSITION DE LA MATRICE DE L'EAU SURTOUT EN MATIERE ORGANIQUE

Download or read book Aqua written by and published by . This book was released on 1989 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organic Micropollutants in the Aquatic Environment written by G. Angeletti and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 10 years after the "First European Symposium on Organic Micropollutants in the Aquatic Environment", the "Sixth Symposium" was held in Lisbon (Portugal) from 22 to 24 May 1990. The Symposium was organised within the framework of the Concerted Action COST 641 * which is included in the Fourth R&D Programme on the Environment of the Commission of the European Communities expiring at the end of 1990. After restructuring the Concerted Action in 1984, particular attention has been devoted to fate and transformation of organic micropollutants in the aquatic environment. Therefore, a major aim of the Symposium was to review current studies and progress in these areas, besides more general aspects related to analytical methodologies and behaviour of pollutants during water treatment processes. This volume contains the plenary papers presented in the following sessions at the Symposium: - Multidisciplinary studies - Partitioning of organic micropollutants in the aquatic environment - Novel analytical techniques in environmental chemistry - Monitoring micropollutant - Degradation of organic micropollutants during field conditions - Reclamation of polluted ground water - Chemical and photochemical oxidation - Future of environmental chemistry. In addition, extended versions of posters are included, covering the four topics which are dealt within the four Working Parties forming the structure of the Concerted Action: 1. Analytical methodologies 2. Transport and distribution 3. Transformation reactions 4. Water treatment. We believe that the Proceedings give a good overview of current activities in these fields of research in Europe.

Download or read book Basic Technics in Ecological Farming Techniques de Base en Agriculture Biologique Grunds tzliche Verfahren der kologischen Landwirtschaft Le Maintien de la Fertilit des Sols The Maintenance of Soil Fertility Die Erhaltung der Bodenfruchtbarkeit written by Stuart Hill and published by Birkhäuser. This book was released on 2013-12-14 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book International Water Supply Association written by International Water Supply Association. Congress and published by . This book was released on 1980 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biodiversity and Ecophysiology of Yeasts written by Carlos Augusto Rosa and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few decades more and more yeast habitats have been explored, spanning cold climates to tropical regions and dry deserts to rainforests. As a result, a large body of ecological data has been accumulated and the number of known yeast species has increased rapidly. This book provides an overview of the biodiversity of yeasts in different habitats. Recent advances achieved by the application of molecular biological methods in the field of yeast taxonomy and ecology are also incorporated in the book. Wherever possible, the interaction between yeasts and the surrounding environment is discussed.

Download or read book The Periodic Table Nature s Building Blocks written by J. Theo Kloprogge and published by Elsevier. This book was released on 2020-11-18 with total page 931 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Periodic Table: Nature’s Building Blocks: An Introduction to the Naturally Occurring Elements, Their Origins and Their Uses addresses how minerals and their elements are used, where the elements come from in nature, and their applications in modern society. The book is structured in a logical way using the periodic table as its outline. It begins with an introduction of the history of the periodic table and a short introduction to mineralogy. Element sections contain their history, how they were discovered, and a description of the minerals that contain the element. Sections conclude with our current use of each element. Abundant color photos of some of the most characteristic minerals containing the element accompany the discussion. Ideal for students and researchers working in inorganic chemistry, minerology and geology, this book provides the foundational knowledge needed for successful study and work in this exciting area. Describes the link between geology, minerals and chemistry to show how chemistry relies on elements from nature Emphasizes the connection between geology, mineralogy and daily life, showing how minerals contribute to the things we use and in our modern economy Contains abundant color photos of each mineral that bring the periodic table to life

Download or read book Synthetic Fuels Handbook written by James Speight and published by McGraw Hill Professional. This book was released on 2008-06-22 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capitalize on the Vast Potential of Alternative Energy Sources Such as Fuel Cells and Biofuels Synthetic Fuels Handbook is a comprehensive guide to the benefits and trade-offs of numerous alternative fuels, presenting expert analyses of the different properties, processes, and performance characteristics of each fuel. It discusses the concept systems and technology involved in the production of fuels on both industrial and individual scales. Written by internationally renowned fuels expert James G. Speight, this vital resource describes the production and properties of fuels from natural gas and natural gas hydrates...tar sand bitumen...coal...oil shale...synthesis gas...crops...wood sources...biomass...industrial and domestic waste...landfill gas...and much more. Using both U.S. and SI units, Synthetic Fuels Handbook features: Information on conventional and nonconventional fuel sources Discussion of the production of alternative fuels on both industrial and individual scales Analyses of properties and uses of gaseous, liquid, and solid fuels from different sources Comparison of properties of alternative fuels with petroleum-based fuels Discover All the Benefits and Trade-Offs of Synthetic Fuels • Fuel sources: conventional and nonconventional • Natural gas and natural gas hydrates • Petroleum and heavy oil • Tar sand bitumen • Coal • Oil shale • Synthesis gas • Crops • Wood sources • Biomass • Industrial and domestic waste • Landfill gas • Comparison of the properties and uses of gaseous fuels from different sources • Comparison of the properties and uses of liquid fuels from different sources • Comparison of the properties and uses of solid fuels from different sources

Download or read book Health Effects of Environmental Pollution written by and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: