Download or read book Fluorescence of Organic Matter and Polycyclic Aromatic Hydrocarbons PAHS in Coastal Marine Sediments written by Yixian Zhang and published by . This book was released on 2003 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physico chemical Speciation and Ocean Fluxes of Polycyclic Aromatic Hydrocarbons written by Örjan Gustafsson and published by . This book was released on 1997 with total page 308 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 Analysis of Polycyclic Aromatic Hydrocarbons PAHs in the Sediments of the Port of Tripoli written by Karim Soufi and published by . This book was released on 2014 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metabolism of Polycyclic Aromatic Hydrocarbons in the Aquatic Environment written by Usha Varanasi and published by CRC Press. This book was released on 1989-03-31 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows how the biological transport, bioaccumulation, disposition, and toxicity of polycyclic aromatic hydrocarbons (PAH) in the aquatic environment are influenced by the ability or inability of organisms to metabolize these environmental pollutants. Written by leading scientists in the fields of PAH metabolism and toxicity in both aquatic and mammalian systems, this book discusses recent advances in the areas of PAH biogeochemistry and bioaccumulation, microbial degradation, enzymes of activation, and detoxication, metabolism of PAH, and laboratory and field studies on carcinogenic/toxic effects. Additionally, important similarities and differences in metabolism of PAH by aquatic and terrestrial organisms are featured. The discussion of bioavailability, metabolism, and subsequent toxic effects should aid in the assessment of the ecological consequences of PAH in the aquatic environment.

Download or read book Remobilization of Polycyclic Aromatic Hydrocarbons and Organic Matter in Seawater During Sediment Resuspension Experiments from a Polluted Coastal Environment Insights from Toulon Bay France written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PAHs written by Peter E. T. Douben and published by John Wiley & Sons. This book was released on 2003-07-25 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic aromatic hydrocarbons (PAHs), or polyarenes, are one of the largest and most structurally diverse class of organic molecules known. High percentages of polyarenes, representing a wide range of molecular sizes and structural types, are present in coal tars and petroleum residues. The major sources of PAHs are crude oil, coal and oil shale. The fuels produced from these fossil sources constitute the primary source of energy for the industrial nations of the world, and the petrochemicals from these raw materials are the basis of the synthetic fibre and plastics industries. PAHs are however, widespread pollutants and their impact on the environment and human health must be monitored and controlled. This book will review and assess our scientific understanding of the ecological exposure and effects PAHs have in different environments and habitats. It will accomplish this by taking the recipients of the pollution in the environment as starting points and working its way back through pathways to access what is required for our understanding of effects and rationale for control. Although this book will concentrate on ecological exposure of PAHs, the general impacts of PAHs on human populations will be touched upon. It is thought to be the first book to focus on the ecological aspects of PAHs.

Download or read book Polycyclic Aromatic Hydrocarbons in Sediments of Marinas Western Basin Lake Erie U S A written by Donald E. Nelson (Jr.) and published by . This book was released on 2009 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recreational boating facilities have historically been areas of polycyclic aromatic hydrocarbon (PAH) contamination brought upon by a variety of sources including stormwater runoff, petroleum product combustion, atmospheric deposition, and fueling operations. These compounds can be released to the environment through disturbance of the sediments. Physicochemical reactions of particulate phase organic matter with organic contaminants in contaminated sediments are one of the factors that may influence the release of these contaminants to the surrounding environment. Relationships between these organic matter components and PAHs may be a deciding factor in determining the fate of these dredged sediments, including their possible re-use. In this study, the relationships between PAH concentrations and organic matter components are presented. Desorption kinetics are examined in a laboratory setting using Tenax® TA resin beads that act as an infinite sink for hydrocarbons. Three marinas, along the Western Basin of Lake Erie were chose to represent common marina settings throughout the basin. Samples were analyzed for organic matter, total organic carbon, black carbon, and PAHs. Concentrations of PAH compounds were variable within and between marinas. Ratios of PAH compounds indicated that most chemicals are from a pyrogenic origin. Although it was the smallest portion of the quantified organic matter, black carbon showed the best correlation to PAH concentrations. Desorption trials show compounds desorb in a biphasic component manner, a fast desorbing component and a slow more "refractory" component. Desorption kinetics were mostly related to the quality of organic matter present, with slow desorbing sites having higher black carbon quantities.

Download or read book Determination of Parent and Alkylated Polycyclic Aromatic Hydrocarbons PAHs in Biota and Sediment written by L. Webster and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phenanthrene Adsorption and Desorption by Melanoidins and Marine Sediment Humic Acids written by John Andrew Terschak and published by . This book was released on 2002 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sediments are major reservoirs of persistent petroleum contamination in marine environments. Petroleum hydrocarbons associate with the sediment organic matter, of which humic acids are an important constituent. This study examined the role that humic acids and their structures play in the kinetics and mechanisms of polycyclic aromatic hydrocarbon (PAH) interactions with sediments. Natural humic acids, with a wide range of properties, were isolated from Alaska coastal marine sediments. Melanoidins were synthesized and used as humic acid analogs. The humic acids were characterized by elemental and isotopic analyses, Fourier transform infrared spectroscopy, and cross-polarized magic angle spinning 13C nuclear magnetic resonance spectroscopy. The humic acids were coated onto a standard montmorillonite clay, and the adsorption and desorption of phenanthrene was measured using a radiotracer. Adsorption required about one week to reach steady state, indicative of slow diffusion of PAH within the humic acid. The composition of the humic acids had a greater effect on phenanthrene adsorption than their concentrations on the clay. Organic carbon normalized adsorption partition coefficients were closely correlated with the sum of amide and carboxylic carbons, a measure of the polarity of the humic acids, but were independent of initial phenanthrene concentration, indicating that the binding sites were unlimited and uniform in strength. This explains the fact that initial adsorbed concentration of phenanthrene had no effect on subsequent phenanthrene adsorption. Desorption of phenanthrene was not related to any of the humic acid structural characteristics measured. The initial desorption rate was linearly related to the initial adsorbed concentration, as expected for a diffusive process, and was negatively correlated with the carbon content of the humic acid coated clay. Under most conditions, desorption was complete after one to seven days; there was little evidence for irreversible adsorption. Because of the substantial variability of adsorption and and desorption behavior with organic matter characteristics, interactions of aromatic hydrocarbons with marine sediments cannot be predicted based on total organic matter concentration alone. Information on aspects of organic matter composition is needed in order to make accurate predictions"--Leaves 3-4.

Download or read book Factors Influencing the Microbial Mineralization of Polycyclic Aromatic Hydrocarbons in Coastal Marine Sediments written by Jeanne Debra Gulnick and published by . This book was released on 2000 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Interactions Between Polycyclic Aromatic Hydrocarbons PAHs and Sediments microform Interaction of Naphthalene with Marine Sediments written by Nidia Patricia Grandados Saavedra and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastal Marine Institute written by U. S. Department U.S. Department of the Interior and published by CreateSpace. This book was released on 2015-06-22 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic aromatic hydrocarbons are ubiquitous contaminants in aquatic environments. Because of their hydrophobicity, PAHs accumulate in bed sediments and pose risk to the benthos. Informations on the toxicity of sediment-associated PAHs is, however, limited and more information is needed to improve sediment quality-criteria and eoological risk analysis.

Download or read book The Fluorescence of Dissolved Organic Matter in the Marine Environment written by Robert Francis Chen and published by . This book was released on 1992 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polycyclic Aromatic Hydrocarbons written by and published by National Academies. This book was released on 1983-01-01 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrogenic Polycyclic Aromatic Hydrocarbons in the Aquatic Environment Analysis Synthesis Toxicity and Environmental Impact written by Daniela M. Pampanin and published by Bentham Science Publishers. This book was released on 2017-04-07 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although a lot is known about the influence of Polycyclic Aromatic Hydrocarbons (PAHs) on the marine environment, there are still many unanswered questions. Petrogenic Polycyclic Aromatic Hydrocarbons in the Aquatic Environment is a monograph that sums up basic knowledge about this topic while highlighting current research practices useful in studying the aquatic environment. It starts with an introduction to effect of PAH in the marine environment. It then proceeds to provide information on techniques to monitor PAH levels and investigate the affected environment in order to control the subsequent negative effects. Chapters also detail the carcinogenic and endocrine effects of PAHs on fish as well as the degradation of PAHs by microorganisms. This monograph is a useful reference for environmental science students and professionals learning about the role of PAH in the marine environment.

Download or read book written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: