Download or read book Analysis of Gas Phase Polycyclic Aromatic Hydrocarbon Mixtures by Laser Induced Fluorescence written by and published by . This book was released on 2011 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser induced Fluorescence Measurements of Vapor phase Polycyclic Aromatic Hydrocarbons I Evaluation of One and Two photon Excitation Processes for Mixture Analysis II Flame Temperature Measurements Using the Anomalous Fluorescence of Pyrene written by Diane LeAnna Peterson and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Induced Fluorescence Study of the Heterogeneous Interaction of Polycyclic Aromatic Hydrocarbons with Aqueous Surfaces microform Adsorption and Reaction with Gas phase Ozone written by Baagi Thema Mmereki and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have also measured the kinetics and products of a reaction between gas-phase ozone and anthracene adsorbed at the air-aqueous interface. The reactions at the "uncoated" air-water interface and at an interface consisting of a monolayer of various organic compounds were studied. In all the cases, the reaction follows a Langmuir-Hinshelwood mechanism, in which ozone first adsorbs to the air-aqueous interface, and then reacts with adsorbed anthracene. For typical atmospheric ozone concentrations, the estimated reactive uptake coefficient ranges from 2 x 10-8 to 3 x 10-7 depending on the nature of the air-aqueous interface. Smaller (C4, C6) carboxylic acids at the interface inhibit the reaction (compared to the "clean" water surface); 1-octanol enhances it. Under some circumstances, oxidation by ozone on aqueous surfaces may be more important in the atmosphere than gas phase oxidation by OH radicals. The fate of atmospheric semi-volatile organic compounds (SOCs) such as polycyclic aromatic hydrocarbons (PAHs) depends, in part, on their distribution between the gas phase and particulate phases, and oxidation reactions. In the daytime troposphere, photochemically produced OH radicals dominate these reactions, whereas chlorine atoms may contribute to the oxidation of certain PAHs in coastal areas. In the dark, oxidation by nitrate radicals (NO3) may also be important, whereas ozone can contribute to the oxidation both during the day and at night. We have developed a laser-induced fluorescence (LIF) method to study adsorption and oxidation of PAHs at the air-aqueous interface. This method allows to directly probe the mechanisms and extent of PAH uptake on aqueous surfaces. The kinetics of the adsorption of anthracene and pyrene onto "pure" water and water coated with an organic film were measured. The surface uptake coefficients of both PAHs are estimated to be on the order of 10-5, and increase by a factor of 2--3 for uptake to the 1-octanol coated water surface. However, the surface uptake of pyrene to a hexanoic-acid-coated aqueous surface does not display this enhancement. Resolved fluorescence spectra of pyrene adsorbed onto 1-octanol-coated surfaces indicate that pyrene is in a less polar environment than when adsorbed at the hexanoic-acid-coated surfaces.

Download or read book Matrix Isolation Analysis of Polycyclic Aromatic Hydrocarbons written by Vincent B. Conrad and published by . This book was released on 1983 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mixture Analysis and Molecular Fluorescence Properties of Polynuclear Aromatic Hydrocarbons PAH by Laser induced Fluorescence Spectroscopy written by Ki-Min Bark and published by . This book was released on 1989 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicological Profile for Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fluorescence Spectroscopy of Gas phase Polycyclic Aromatic Hydrocarbons written by Joshua David Thomas and published by . This book was released on 2006 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Analysis of Particulate and Vapor Phase Polycyclic Aromatic Hydrocarbons in Atmospheric Samples Using Liquid Chromatography with Fluorescence Detection and Gas Chromotography with Mass Spectrometric Detection microform written by Kathleen P. Duggan and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2001 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook on Characterization of Biomass Biowaste and Related By products written by Ange Nzihou and published by Springer Nature. This book was released on 2020-02-17 with total page 1394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides authoritative information, techniques and data necessary for the appropriate understanding of biomass and biowaste (understood as contaminated biomass) composition and behaviour while processed in various conditions and technologies. Numerous techniques for characterizing biomass, biowaste and by-product streams exist in literature. However, there lacks a reference book where these techniques are gathered in a single book, although such information is in increasingly high demand. This handbook provides a wealth of characterization methods, protocols, standards, databases and references relevant to various biomass, biowaste materials and by-products. It specifically addresses sampling and preconditioning methods, extraction techniques of elements and molecules, as well as biochemical, mechanical and thermal characterization methods. Furthermore, advanced and innovative methods under development are highlighted. The characterization will allow the analysis, identification and quantification of molecules and species including biomass feedstocks and related conversion products. The characterization will also provide insight into physical, mechanical and thermal properties of biomass and biowaste as well as the resulting by-products.

Download or read book Vapor Phase Analysis of Aromatic Organic Compounds by Remote Laser induced Fluorescence Via a Fiber Optic Sensor written by Carol J. Botteron and published by . This book was released on 1991 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of Laser Induced Fluorescence Excitation Emission Matrix Spectroscopy for the Analysis of PAHs written by Sean J. Hart and published by . This book was released on 1998 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: For HPLC and FIA, the data are analyzed by examining the summed fluorescence plots and qualitatively comparing the EEMs with standard measurements made with the same system. Species are qualitatively identified and quantitated by RAFA using pure component EEMs as standards and the EEMs measured during an analysis as the unknowns. RAFA calculated PAH concentrations in HPLC and FIA were in the near-quantitative regime, typically within a factor of 2 of the known concentration for laboratory-prepared mixtures. Several real world samples were analyzed and the results were generally acceptable: for HPLC all components were identified and all except two were quantitated to within a factor of 2. Analysis of lab mixtures by FIA yielded good agreement with known concentrations. The analysis of complex real world samples with many components provided reasonable qualitative identification of species and estimates of concentration.

Download or read book Laser Induced Fluorescence Studies in the Gas Phase written by Christopher Guy Atkins and published by . This book was released on 1986 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioenergy Engineering written by Krushna Prasad Shadangi and published by Elsevier. This book was released on 2023-06-20 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioenergy Engineering: Fundamentals, Methods, Modelling, and Applications presents the fundamental principles, recent developments, innovative state-of the-art technologies, challenges, solutions and future perspectives on the production of biofuels and bioenergy. Balancing the scientific and engineering aspects of biofuels production, the book guides readers through the chemical kinetics, modeling, thermodynamics, unit operations and technological advancements in fuel processing from conventional and alternative resources. Each chapter of the book starts with the fundamentals and goes on to assess the latest technologies for the production of renewable fuels on topics. Sections cover biomass utilization, biomass-to-liquid conversion technologies (pyrolysis, liquefaction, solid-state fermentation and submerged fermentation), biomass-to-gas conversion technologies (thermochemical gasification, subcritical and supercritical water gasification, and methanation), gas-to-liquid conversion technologies (Fischer-Tropsch synthesis), carbonization, transesterification, organic transformation, carbon-carbon and carbon-heteroatom coupling reactions, oxidation, reforming, hydrotreating technologies (hydrogenation, hydrodesulfurization, hydrodenitrogenation, hydro dearomatization and hydro demetalization), nanocatalysis and biocatalysis (enzymatic hydrolysis), and much more. Analyzes emerging technologies for the sustainable conversion of various waste and non-waste materials into bioenergy and biofuels Examines a wide range of feedstocks and conversion pathways for liquid and gaseous biofuels Offers practical guidance and data on how to conduct lifecycle assessment, techno-economic analysis, and utilize GIS modeling for a range production pathways

Download or read book Development of a Laser Induced Fluorescence Technique for the Analysis of Organic Air Pollutants written by Patricia B. C. Forbes and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants which are of concern due to their potential human toxicity. They are formed during numerous combustion processes, including biomass burning and diesel vehicular emissions, which are of relevance in developing countries. A novel analytical screening method for atmospheric polycyclic aromatic hydrocarbons (PAHs) was developed in this study based on laser induced fluorescence (LIF) of samples on quartz multi-channel polydimethylsiloxane (PDMS) traps. A tunable dye laser with a frequency doubling crystal provided the excitation radiation, and a double monochromator with a photomultiplier tube detected emitted fluorescence. The method allowed for the rapid (

Download or read book Gas phase Reactions of Polycyclic Aromatic Hydrocarbons with Model DNA Bases written by Andy B. Whitehill and published by . This book was released on 1996 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chromatographic Analysis of the Environment Third Edition written by Leo M.L. Nollet and published by CRC Press. This book was released on 2005-11-29 with total page 1290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromatographic Analysis of the Environment, Third Edition is a detailed handbook on different chromatographic analysis techniques and chromatographic data for compounds found in air, water, soil, and sludge. Taking on a new perspective from previous editions, this third edition discusses the parameters of each environmental compartment in a consistent format that highlights preparation techniques, chromatographic separation methods, and detection methods. Most of the data are compiled in tables and figures to elucidate the text as needed. Separate chapters approach specific aspects of sampling methods especially designed for environmental purposes, quantification of environmental analytes in difficult matrices, and data handling. The second part of the book focuses on the analysis of hazardous chemicals in the environment, including volatile organic carbons (VOCs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and endocrine-disrupting chemicals (EDCs). In addition, the authors feature information on compounds such as phosphates, organic acids, halogenated VOCs, amines, and n-ntirosamines, isocyanates, phthalate esters, and humic substances. Presenting important theoretical and practical aspects from sample collection to laboratory analysis, Chromatographic Analysis of the Environment, Third Edition is a unique resource of chromatographic techniques, data, and references that are useful to all scientists involved in the analysis of environmental compounds.