Analyse De Linterface Catalyseur Supporte Milieu Aqueux Dans Loxydation Despeces Dissoutes

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Analyse de l'interface catalyseur supporté-milieu aqueux dans l'oxydation d'espèces dissoutes

Author : Hélène Marchand-Cury
Publisher :
ISBN 13 :
Total Pages : 141 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Analyse de l'interface catalyseur supporté-milieu aqueux dans l'oxydation d'espèces dissoutes by : Hélène Marchand-Cury

Download or read book Analyse de l'interface catalyseur supporté-milieu aqueux dans l'oxydation d'espèces dissoutes written by Hélène Marchand-Cury and published by . This book was released on 1997 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le rôle de l'adsorption a été étudié dans l'oxydation catalytique hétérogène des molécules organiques et du sulfure d'hydrogène en présence d'oxyde métallique supporté. Les propriétés physiques et superficielles des supports ont été mesurées avant et après dispersion du catalyseur. Ensuite, on a étudié le comportement des catalyseurs et des supports vis-à-vis des ions minéraux rencontrés dans une eau naturelle type Méry-sur-Oise (hydrogénocarbonate de sodium et chlorure de calcium). La connaissance approfondie des propriétés superficielles des catalyseurs supportés et de leur affinité vis-à-vis des ions minéraux a permi de préciser le rôle du catalyseur et du support dans l'adsorption de quatre molécules organiques et de connaître les mécanismes de l'adsorption du salicylate (modèle des substances humiques) sur deux supports. Le rôle de l'adsorption dans l'oxydation catalytique a été par la suite estimé à l'aide d'expérimentation faite en présence d'ozone. Il apparaît que l'oxydation peut se produire lorsque la molécule est adsorbée ou non. Les mécanismes de l'oxydation catalytique restent proches de ceux connus de la phase homogène donc ils sont très sensibles au pH. Le catalyseur et les supports adsorbent l'ozone et participent à sa décomposition initiale en présence d'ions hydroxyle ou de peroxyde. La vitesse d'initiation radicalaire est certainement accélérée grâce au catalyseur mais pas suffisament pour éviter des réactions d' adsorption ou d'oxydation directe. L'étude sur l'oxydation catalytique du sulfure d'hydrogène met en évidence son adsorption-oxydation sous trois formes. Deux sont aisément réversibles et représentent la majorité du soufre adsorbé dans des conditions de concentration en sulfure faible. La forme la plus stable, un sulfure métallique, correspond à un empoisonnement limité de l'oxyde. Le support du catalyseur est inerte vis-à-vis des sulfures et des sulfates lorsque l'oxyde métallique est présent

Etude de la réactivité et de la nature des espèces actives dans l'oxydation en milieu aqueux du phénol par le peroxyde d'hydrogène, en présence de catalyseurs à base de fer déposé sur support carboné

Download Etude de la réactivité et de la nature des espèces actives dans l'oxydation en milieu aqueux du phénol par le peroxyde d'hydrogène, en présence de catalyseurs à base de fer déposé sur support carboné PDF Online Free

Author : Annie Majesté Labourdenne
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (799 download)

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Book Synopsis Etude de la réactivité et de la nature des espèces actives dans l'oxydation en milieu aqueux du phénol par le peroxyde d'hydrogène, en présence de catalyseurs à base de fer déposé sur support carboné by : Annie Majesté Labourdenne

Download or read book Etude de la réactivité et de la nature des espèces actives dans l'oxydation en milieu aqueux du phénol par le peroxyde d'hydrogène, en présence de catalyseurs à base de fer déposé sur support carboné written by Annie Majesté Labourdenne and published by . This book was released on 2000 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJECTIF DE CE TRAVAIL EST L'ETUDE DE LA REACTION D'OXYDATION DU PHENOL PAR LE PEROXYDE D'HYDROGENE EN PRESENCE DE CATALYSEURS CONSTITUES DE FER DEPOSE SUR UN SUPPORT CARBONE (CHARBON ACTIF OU GRAPHITE) A TEMPERATURE AMBIANTE ET PRESSION ATMOSPHERIQUE. CES CATALYSEURS SONT TRES ACTIFS (MALGRE UN PHENOMENE D'ADSORPTION ASSEZ CONSEQUENT POUR CEUX SUPPORTES SUR CHARBON ACTIF), LES CONDITIONS OPTIMALES ETANT OBTENUES POUR UN MILIEU PARFAITEMENT AERE, A UN PH DE 3,7. LA STABILITE DES CATALYSEURS SUPPORTES SUR CHARBON ACTIF A PU ETRE AMELIOREE PAR AJOUT DE CERIUM SUR LE CATALYSEUR. TOUTEFOIS, UN CATALYSEUR PREPARE IN SITU PAR AJOUT DU SUPPORT SEUL ET D'UNE SOLUTION DE FER(III) DANS LE MILIEU REACTIONNEL AINSI QU'UN CATALYSEUR PREPARE PAR ADSORPTION D'UNE SOLUTION DE FER(III) SUIVI UNIQUEMENT D'UN SECHAGE (SANS CALCINATION) ONT ETE TROUVES PLUS ACTIFS QUE LES CATALYSEURS AYANT SUBI UNE CALCINATION. LA CARACTERISATION PAR RPE DE CATALYSEURS SOLIDES A MONTRE QUE LE FER ETAIT SOUS FORME DE CLUSTERS OU D'ESPECES ISOLEES, LES CATALYSEURS LES PLUS ACTIFS NE PRESENTANT QUE DES ESPECES FER ISOLEES, IL SEMBLE QU'ELLES PUISSENT ETRE LES SITES ACTIFS DANS L'OXYDATION DU PHENOL PAR H 2O 2. LA NATURE DES ESPECES FORMEES PAR ACTION DE H 2O 2 SUR LE CATALYSEUR A ETE ETUDIEE PAR RPE A L'AIDE D'UN PIEGEUR DE RADICAUX. DES RADICAUX HYDROXYLES ONT ETE DETECTES EN PRESENCE DES CATALYSEURS SOLIDES INDIQUANT QU'ILS SONT LES ESPECES ACTIVES EN OXYDATION DU PHENOL, ALORS QU'EN PRESENCE D'UN CATALYSEUR HOMOGENE (FER(III) EN SOLUTION) DES ESPECES NON-RADICALAIRES POUVANT ETRE DES ENTITES METAL-OXYGENE (FE I V = O OU FE V = O) SONT FORMEES. POUR LES CATALYSEURS SOLIDES, LA REACTION D'OXYDATION SE DEROULE DONC EN SURFACE OU LE PHENOL ET H 2O 2 SONT ADSORBES.

Activated Carbon

Author : Harry Marsh
Publisher : Elsevier
ISBN 13 : 0080455964
Total Pages : 555 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Activated Carbon by : Harry Marsh

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

Scientific Basis for Nuclear Waste Management XXII: Volume 556

Author : David J. Wronkiewicz
Publisher :
ISBN 13 :
Total Pages : 1370 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Scientific Basis for Nuclear Waste Management XXII: Volume 556 by : David J. Wronkiewicz

Download or read book Scientific Basis for Nuclear Waste Management XXII: Volume 556 written by David J. Wronkiewicz and published by . This book was released on 1999-11-24 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe and effective management of nuclear waste provides a broad range of challenges for materials science. Waste processing, waste form and engineered barrier properties, interactions between engineered and geological systems, radiation effects, chemistry and transport of waste species, and long-term predictions of repository performance are just some of the scientific problems facing modern society. This book, the 22nd in a very successful series from MRS, offers an international and inter-disciplinary perspective on the issues, and features developments in both fundamental and applied areas. Topics include: development and characterization of ceramic waste forms; ceramic waste form corrosion; glass waste form processing; glass formulation, properties and structure; glass waste form corrosion; spent nuclear fuel; performance assessment; repository backfill; flow and transport; natural analogues; container corrosion; metal waste form corrosion; radionuclide speciation and solubility; radionuclide sorption; microbial effects; radiation effects; cement waste forms and waste treatment.

Food Chemistry Research Developments

Author : Konstantinos N. Papadopoulos
Publisher : Nova Publishers
ISBN 13 : 9781604562620
Total Pages : 320 pages
Book Rating : 4.5/5 (626 download)

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Book Synopsis Food Chemistry Research Developments by : Konstantinos N. Papadopoulos

Download or read book Food Chemistry Research Developments written by Konstantinos N. Papadopoulos and published by Nova Publishers. This book was released on 2008 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food chemistry is the study of chemical processes and interactions of all biological and non-biological components of foods. The biological substances include such items as meat, poultry, lettuce, beer, and milk as examples. It is similar to biochemistry in its main components such as carbohydrates, lipids, and protein, but it also includes areas such as water, vitamins, minerals, enzymes, food additives, flavours, and colours. This discipline also encompasses how products change under certain food processing techniques and ways either to enhance or to prevent them from happening. An example of enhancing a process would be to encourage fermentation of dairy products with lactic acid; an example of a preventing process would be stopping the Maillard reaction on the surface of freshly cut Red Delicious apples whether by hand or mechanical methods. This book presents the recent research from around the world in this field.

Nanoscale Graphitic Carbon Nitride

Author : Alagarsamy Pandikumar
Publisher : Elsevier
ISBN 13 : 0128230347
Total Pages : 570 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Nanoscale Graphitic Carbon Nitride by : Alagarsamy Pandikumar

Download or read book Nanoscale Graphitic Carbon Nitride written by Alagarsamy Pandikumar and published by Elsevier. This book was released on 2021-09-09 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoscale Graphitic Carbon Nitride focuses on multi-functional applications including energy conversion, storage and healthcare. Polymeric graphitic carbon nitride materials have attracted much attention in recent years because of their similarity to graphene. They are composed of carbon, nitrogen and some minor hydrogen content. In contrast to graphene, g-Graphitic carbon nitride is a medium band-gap semiconductor and in that role an effective photocatalyst and chemical catalyst for a broad variety of reactions and applications. This book covers the fundamentals and applications of graphitic carbon nitride (g-C3N4) in different sectors. It also covers the application of graphitic carbon nitride-based composites with metal, metal oxides, metal sulphide and carbon-based materials. This is an important resource for researchers in the fields of materials science, engineering, energy storage and chemical engineering who want to understand how nanoscale graphitic carbon nitride is being used for a range of industrial applications and processes. Outlines the major properties of nanoscale graphitic carbon nitride, along with their major application areas Assesses the challenges of manufacturing graphitic carbon nitride on a mass scale Explains major synthesis methods for nanoscale graphitic carbon nitride

Flexoelectricity in Liquid Crystals

Author : Agnes Buka
Publisher : World Scientific
ISBN 13 : 1848167997
Total Pages : 299 pages
Book Rating : 4.8/5 (481 download)

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Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Scientific Basis for Nuclear Waste Management XXIII: Volume 608

Author : Robert W. Smith
Publisher :
ISBN 13 :
Total Pages : 800 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Scientific Basis for Nuclear Waste Management XXIII: Volume 608 by : Robert W. Smith

Download or read book Scientific Basis for Nuclear Waste Management XXIII: Volume 608 written by Robert W. Smith and published by . This book was released on 2000-10-09 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-standing symposia series has become the premier, international forum for scientific and engineering issues related to all levels and types of radioactive wastes and their management. Topics include: fuel cladding and spent nuclear fuel; container fabrication and corrosion; performance assessment; repository performance; radionuclide sorption and transport; cement-based materials and waste containment; corrosion of ceramic wasteforms; structure and characterization of ceramics; radiation effects; natural analogs; wasteform characterization and processing; and corrosion and characterization of glass wasteforms.

Porous Carbons

Author : Feiyu Kang
Publisher : Elsevier
ISBN 13 : 0128221534
Total Pages : 874 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Porous Carbons by : Feiyu Kang

Download or read book Porous Carbons written by Feiyu Kang and published by Elsevier. This book was released on 2021-11-04 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon materials form pores ranging in size and morphology, from micropores of less than 1nm, to macropores of more than 50nm, and from channel-like spaces with homogenous diameters in carbon nanotubes, to round spaces in various fullerene cages, including irregularly-shaped pores in polycrystalline carbon materials. The large quantity and rapid rate of absorption of various molecules made possible by these attributes of carbon materials are now used in the storage of foreign atoms and ions for energy storage, conversion and adsorption, and for environmental remediation. Porous Carbons: Syntheses and Applications focuses on the fabrication and application of porous carbons. It considers fabrication at three scales: micropores, mesopores, and macropores. Carbon foams, sponges, and 3D-structured carbons are detailed. The title presents applications in four key areas: energy storage, energy conversion, energy adsorption, including batteries, supercapacitors, and fuel cells and environmental remediation, emphasizing the importance of pore structures at the three scales, and the diffusion and storage of various ions and molecules. The book presents a short history of each technique and material, and assesses advantages and disadvantages. This focused book provides researchers with a comprehensive understanding of both pioneering and current synthesis techniques for porous carbons, and their modern applications. Presents modern porous carbon synthesis techniques and modern applications of porous carbons Presents current research on porous carbons in energy storage, conversion and adsorption, and in environmental remediation Provides a history and assessment of both pioneering and current cutting-edge synthesis techniques and materials Covers a significant range of precursor materials, preparation techniques, and characteristics Considers the future development of porous carbons and their various potential applications

Karen's New Bike (Baby-Sitters Little Sister #62)

Author : Ann M. Martin
Publisher : Scholastic Inc.
ISBN 13 : 1338057812
Total Pages : 76 pages
Book Rating : 4.3/5 (38 download)

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Book Synopsis Karen's New Bike (Baby-Sitters Little Sister #62) by : Ann M. Martin

Download or read book Karen's New Bike (Baby-Sitters Little Sister #62) written by Ann M. Martin and published by Scholastic Inc.. This book was released on 2016-05-31 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Yikes, My Bike! Karen is learning all about bike safety in school. She is even going to enter a bike-a-thon. But Karen’s bike is too small for her. So with Daddy’s help, Karen buys a new bike. Then Karen’s new bike is stolen. Can Karen catch the thief and get her bike back?

Catalogue of the Fresh-water Fishes of Africa in the British Museum (Natural History) ...

Author : British Museum (Natural History). Department of Zoology
Publisher :
ISBN 13 :
Total Pages : 402 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Catalogue of the Fresh-water Fishes of Africa in the British Museum (Natural History) ... by : British Museum (Natural History). Department of Zoology

Download or read book Catalogue of the Fresh-water Fishes of Africa in the British Museum (Natural History) ... written by British Museum (Natural History). Department of Zoology and published by . This book was released on 1909 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Carbon Alloys

Author : E. Yasuda
Publisher : Elsevier
ISBN 13 : 0080528538
Total Pages : 584 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Carbon Alloys by : E. Yasuda

Download or read book Carbon Alloys written by E. Yasuda and published by Elsevier. This book was released on 2003-03-05 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years the Japanese have funded a comprehensive study of carbon materials which incorporate other elements including boron, nitrogen and fluorine, hence the title of the project "Carbon Alloys". Coined in 1992, the phrase "Carbon Alloys" can be applied to those materials mainly composed of carbon materials in multi-component systems. The carbon atoms of each component have a physical and/or chemical interactive relationship with other atoms or compounds. The carbon atoms of the components may have different hybrid bonding orbitals to create quite different carbon components. Eiichi Yasuda and his team consider the definition of Carbon Alloys, present the results of the Carbon Alloys projects, describe typical Carbon Alloys and their uses, discuss recent techniques for their characterization, and finally, illustrate potential applications and future developments for Carbon Alloy science. The book contains over thirty chapters on these studies from as many researchers. The most modern of techniques, particularly in the area of spectroscopy, were used as diagnostic tools, and many of these are applicable to pure carbons also. Porosity in carbons received considerable attention.

Organochlorine Insecticides

Author : F. Moriarty
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Organochlorine Insecticides by : F. Moriarty

Download or read book Organochlorine Insecticides written by F. Moriarty and published by . This book was released on 1975 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring persistent organic pollhitants; exposure and residues; variationin the intake and elimination of pollutants; the role of the thy roid in the production of sublethal effec by organochlorine insecticides and polychlorine insecticides on amimal populations; persistent percides an economic and legal analysis.

Nonlinear Optical Materials

Author : Jerome V. Moloney
Publisher : Springer Science & Business Media
ISBN 13 : 9780387985817
Total Pages : 270 pages
Book Rating : 4.9/5 (858 download)

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Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney

Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.

Rivulins of the Old World

Author : Jørgen J. Scheel
Publisher : TFH Publications
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Rivulins of the Old World by : Jørgen J. Scheel

Download or read book Rivulins of the Old World written by Jørgen J. Scheel and published by TFH Publications. This book was released on 1975 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Desorption Mass Spectrometry

Author : Philip A. Lyon
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Desorption Mass Spectrometry by : Philip A. Lyon

Download or read book Desorption Mass Spectrometry written by Philip A. Lyon and published by . This book was released on 1985 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges the gap between SIMS and FAB mass spectrometry. Focuses on surface techniques that can use either SIMS or FAB mass spectrometry. Includes fundamentals, instrumental design, and applications. Demythologizes particle bombardment by addressing both the chemistry and physics involved.

Bioremediation Technology

Author : M. H. Fulekar
Publisher :
ISBN 13 : 9780367273101
Total Pages : 376 pages
Book Rating : 4.2/5 (731 download)

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Book Synopsis Bioremediation Technology by : M. H. Fulekar

Download or read book Bioremediation Technology written by M. H. Fulekar and published by . This book was released on 2020-01-15 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioremediation Technology: Hazardous Waste Management describes hazardous waste industries, sources of waste generation, characterization and treatment processes/methods, and technique and technology to deal with the treated waste as per the prescribed standard. Advanced treatment based on the microbial remediation, plant-based decontamination, rhizoremediation and nano-based remediation is also explained. Advances in treatment technology using biotechnological tools/bionanotechnology for removal of contaminants are described. This volume will help readers to develop bio-nano-based technologies, which can be transferred from lab to land, and pilot to commercial scenarios. Covers bioremediation aspects of hazardous waste generation from industries, their characterization and treatment Includes case studies at field scale of bioremediation processes Describes electronic waste and their identification, characterization, treatment and recovery of heavy metals through bioleaching/ biosorption Covers toxic waste and statistics, and bioreactor design and applications Discusses relevant technology transfer from lab to land