Download or read book Perfluoroalkylsulfonic and Carboxylic Acids in Earthworms Eisenia Fetida Accumulation and Effects Results from Spiked Soils at PFAS Concentrations Bracketing Environmental Relevance written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Risk to Wildlife from Exposures to Per and Polyfluorinated Alkyl Substances PFAS written by Mark S. Johnson and published by CRC Press. This book was released on 2021-04-21 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding Risk to Wildlife from Exposures to Per- and Polyfluorinated Alkyl Substances (PFAS) provides the most recent summary of toxicity data relevant to mammals, birds, reptiles, and amphibians, and provides values for use in risk assessment applications. Predicting the bioaccumulation of PFAS in terrestrial wildlife (including humans) has proven to be extremely complex. As a group, PFAS act differently than traditional non-ionic organic molecules, where PFAS can break down and reform, whereas some are demonstrated to be extremely persistent. Where sufficient data are provided, this book establishes toxicity reference values (TRVs), which are derived to assist in characterizing environmental sources of contamination and making risk-based decisions. Features: Provides toxicity reference values (TRVs) for vertebrates (mammals, birds, amphibians) for PFAS, where sufficient data are available, and includes objective supporting background information. Assigns a level of confidence to each TRV to provide the risk assessor with an understanding of the relative uncertainty associated with each value. Presents toxicity data in the formats of scatter diagrams and tables for quick review and assessment. Provides TRVs relevant for screening and decision making This book serves as a useful aid for risk assessors and managers in those industries that have sites contaminated with PFAS, consultants tasked with evaluating risks at such sites, and staff at regulatory agencies at various governmental levels, who need to know how much contamination is considered safe for wildlife. It will also appeal to researchers with an interest in filling the gaps in the current toxicological data for PFAS exposure.
Download or read book Current Developments in Biotechnology and Bioengineering written by Sridhar Pilli and published by Elsevier. This book was released on 2022-08-27 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Treatment Technologies for Pre- and Poly-flourakyl Substances provides comprehensive details about per- and poly-fluroalkyls substances (PFASs), which are highly toxic and bio-accumulative substances that do not biodegrade easily or cannot be neutralized under normal environmental conditions. It discusses their occurrence in water, wastewater, and aquatic environment, their bioaccumulation in plants, environmental impacts and various remedial technologies for their treatment and management. All the chapters provide state-of-art information about PFASs, describing their identification methods, characterization and present critical analysis of the treatment methods such as physical, chemical, biological, hybrid and advanced systems. This book is a ready reference for the environmental engineers, municipal engineers, environmental practitioners, policy makers, and planners; it is also a practical guide for industrial engineers, government bodies and ecologists as well as for researchers. Describes occurrence of PFASs in aquatic environment and on plant Provides details on identification methods and characterization of PFAS Describes physical, chemical, biological, hybrid and advanced system treatments for PFASs Covers regulatory aspects on PFASs First dedicated book on PFASs
Download or read book Bioaccumulation of Perfluoroalkyl and Polyfluoroalkyl Substances PFAS in Earthworms Eisenia Fetida from Sorbent amended Soils written by Julie Jarjour and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The use of aqueous film-forming foams (AFFFs) for extinguishing fuel fires has introduced poly- and perfluoroalkyl substances (PFAS) into different environmental media, including soil. Such contaminated sites are long-term sources of PFAS pollution, posing a threat to drinking water supplies in many locations. In situ soil stabilization using sorbent amendments, such as granular activated carbon and modified clay minerals, has demonstrated efficacy in immobilizing PFAS in contaminated soil. The measure is expected to be highly effective in reducing PFAS bioavailability to earthworms, the predominant soil invertebrates, but limited experimental evidence is available. Therefore, PFAS uptake from contaminated soils by earthworms (Eisenia fetida) following amendment was studied to address the knowledge gap. Two different amendments were evaluated for this study: coal-based activated carbon (F400) and a new modified clay-based adsorbent (FLUORO-SORB100®). Surface soil was collected locally and spiked with PFAS at ~ 100 ng/g dry weight to simulate a moderately contaminated soil, to which the sorbents were amended at different concentrations (0-4 w/w%). A field-collected AFFF-impacted soil with high PFAS levels was tested at one amendment concentration (4 w/w%). The mixture of representative PFAS included 4 perfluoroalkyl sulfonates (PFSAs), 6 perfluoroalkyl carboxylates (PFCAs), and 3 (n:2) fluorotelomer sulfonates (FTSAs). Earthworms were exposed to PFAS during the uptake phase test until the expected steady-state was reached (28 days). Both amendments resulted in reduced earthworm body burdens compared to the setup without amendment, with 4 w/w% amendment being the most effective, reducing body burdens of total PFAS by>95% in the spiked soil. Activated carbon performed slightly better at reducing body burdens in both soils in terms of total PFAS, possibly owing to minimal gut exposure; earthworms largely avoided ingesting the activated carbon probably due to its particle size. In clay-amended soil, both gut route and skin contact contributed to PFAS uptake by earthworms. Furthermore, a soil leaching test was performed at the end of the uptake phase to understand the mobility of PFAS following the soil amendment. The clay-based adsorbent performed better at immobilizing most analytes in the contaminated soil; however, in the spiked soil, clay was not as effective as activated carbon for short-chain PFCAs. Strong positive log-log relationships were observed between leachate concentrations and earthworm body burdens for most PFAS analytes in the spiked soil. The finding suggests that although the leaching test evaluates PFAS mobility, the PFAS leachate concentrations might be correlated with pore water concentrations, thus partly explain the extent of earthworm body burdens. Overall, this study allows for a risk-based assessment strategy for the use of amendments for mitigating PFAS pollution of soils"--
Download or read book Drug Transporters written by Martin F. Fromm and published by Springer Science & Business Media. This book was released on 2010-11-19 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is increasingly recognized that various transporter proteins are expressed throughout the body and determine absorption, tissue distribution, biliary and renal elimination of endogenous compounds and drugs and drug effects. This book will give an overview on the transporter families which are most important for drug therapy. Most chapters will focus on one transporter family highlighting tissue expression, substrates, inhibitors, knock-out mouse models and clinical studies.
Download or read book The North American Quails Partridges and Pheasants written by Paul Johnsgard and published by Lulu.com. This book was released on 2017-10-10 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book documents the biology of six species of New World quails that are native to North America north of Mexico (mountain, scaled, Gambel's, California, and Montezuma quails, and the northern bobwhite), three introduced Old World partridges (chukar, Himalayan snowcock, and gray partridge), and the introduced common (ring-necked) pheasant. Collectively, quails, partridges, and pheasants range throughout all of the continental United States and the Canadian provinces. Two of the species, the northern bobwhite and ring-necked pheasant, are the most economically important of all North American upland game birds. All of the species are hunted extensively for sport and are highly popular with naturalists, birders, and other outdoor enthusiasts.
Download or read book Fluorinated Surfactants and Repellents Second Edition written by Erik Kissa and published by CRC Press. This book was released on 2001-02-09 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: A discussion of the synthesis, problems, theories and applications of fluorinated surfactants, this second edition is updated with four new chapters on repellency and protection against soiling and staining and over 2900 references, equations, and drawings (800 more than the previous edition). It lists alphabetically and explores numerous applications of fluorinated surfactants. Called "...a most useful introduction to these fascinating materials" by the Journal of Dispersion Science and Technology and "...a coherent and stimulating handbook...the most useful book in the fluorinated surfactants field to date. Recommended." by the Journal of the Chemical Society, Faraday Transactions - this book is a source of factual data, methods of manufacture, and chemical structures for the surfactant scientist and user.
Download or read book OECD Guidelines for the Testing of Chemicals Section 3 Test No 317 Bioaccumulation in Terrestrial Oligochaetes written by OECD and published by OECD Publishing. This book was released on 2010-07-23 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Test Guideline describes procedures designed to assess bioaccumulation of chemicals in soil oligochaetes. The parameters which characterise the bioaccumulation of a substance include the bioaccumulation factor (BAF), the uptake rate constant ...
Download or read book Molecular Immunotoxicology written by Emanuela Corsini and published by John Wiley & Sons. This book was released on 2014-11-24 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: The human immune system is constantly exposed to chemical contaminants, whether from food, water or air. Some chemicals directly elicit an immune response, while others indirectly activate or deactivate components within the immune system. Thus when tracking or predicting the effect of a chemical on the immune system, many different pathways and modes of action need to be considered. Following an introduction to the various pathways and toxicity mechanisms from a systemic perspective, the main part of this comprehensive reference surveys individual molecular mechanisms of important immunotoxicants, from PAHs to biopharmaceuticals, and from receptor-mediated toxicity to nanoparticle toxicity, using analyses based on molecular effects rather than on animal models. Taken together, the knowledge presented here provides an up-to-date overview of this hot topic that can be directly applied to the prediction and characterization of immunotoxic effects in drugs, chemicals, and environmental contaminants.
Download or read book Toxicological Effects of Perfluoroalkyl and Polyfluoroalkyl Substances written by Jamie C. DeWitt and published by Humana Press. This book was released on 2015-04-14 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a timely and comprehensive overview of the latest science for perfluoroalkyl and polyfluoroalkyl substances (PFASs), covering the development of methods for assessing PFASs in biological fluids and tissues as well as the current knowledge regarding their toxicity to vertebrate organisms. This book includes chapters on human and wildlife exposure/body burdens, reviews of metabolism and toxicological effects by organ system/developmental stage and aspects of PFAS toxicity that are driving PFAS research and regulatory oversight. Toxicological Effects of Perfluoroalkyl and Polyfluoroalkyl Substances provide critical assessments of the most controversial topics surrounding toxicological evaluation of PFASs to give readers an expert perspective on the issues. Emphasis is placed on the integration of modes and mechanisms of action with functional endpoints that are relevant to human and wildlife health. This book will be a useful resource for toxicologists, environmental chemists, risk assessors and researchers with an interest in the class of compounds known as perfluoroalkyl and polyfluoroalkyl substances.
Download or read book Phosphorus in Action written by Else K. Bünemann and published by Springer Science & Business Media. This book was released on 2010-11-08 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus (P) is a finite resource which is essential for life. It is a limiting nutrient in many ecosystems but also a pollutant which can affect biodiversity in terrestrial ecosystems and change the ecology of water bodies. This book collects the latest information on biological processes in soil P cycling, which to date have remained much less understood than physico-chemical processes. The methods section presents spectroscopic techniques and the characterization of microbial P forms, as well as the use of tracers, molecular approaches and modeling of soil-plant systems. The section on processes deals with mycorrhizal symbioses, microbial P solubilization, soil macrofauna, phosphatase enzymes and rhizosphere processes. On the system level, P cycling is examined for grasslands, arctic and alpine soils, forest plantations, tropical forests, and dryland regions. Further, P management with respect to animal production and cropping, and the interactions between global change and P cycling, are treated.
Download or read book Nucleic Acids and Proteins in Soil written by Paolo Nannipieri and published by Springer Science & Business Media. This book was released on 2006-09-22 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: With millions of different bacterial species living in soil, the microbial community is extremely complex, varying at very small scales. Microbe-driven functions are essential for most processes in soil. Thus, a better understanding of this microbial diversity will be invaluable for the management of the various soil functions. Nucleic Acids and Proteins in Soil combines traditional approaches in soil microbiology and biochemistry with the latest techniques in molecular microbial ecology. Included are methods to analyse the presence and importance of nucleic acids and proteins both inside and outside microbial cells, the horizontal gene transfer which drives bacterial diversity, as well as soil proteomes. Further chapters describe techniques such as PCR, fingerprinting, the challenging use of gene arrays for structural and functional analysis, stable isotope probing to identify in situ metabolic functions, and the use of marker and reporter genes in soil microbial ecology.
Download or read book Wastewater Treatment written by Amin Mojiri and published by Mdpi AG. This book was released on 2022-02-21 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the state-of-the-art water and wastewater treatment methods that can be applied to develop a sustainable treatment technique in the future. Of the several high-quality articles submitted, twelve were published after the peer-review process, with an acceptance rate of 59 percent. In the first section of this book, the articles include the occurrence and removal of emerging contaminants in water bodies. Moreover, the presence of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in water sources is discussed in detail. Subsequently, the removal of polycyclic aromatic hydrocarbons (PAHs), pharmaceuticals and personal care products (PPCPs), and dye with different physicochemical methods is investigated. In another section of this book, the removal of ammonia with anaerobic ammonium oxidation (anammox) is studied. Additionally, the elimination of heavy metals using the adsorption process, as an effective method, is discussed. Moreover, the performance of membrane bioreactors in the elimination of pollutants from landfill leachate is investigated in another article in this book. In addition to this, green and sustainable wastewater technologies (GSWTs) have recently attracted the attention of researchers. Therefore, nanoremediation and microalgae-based systems are discussed as the GSWTs.
Download or read book Perfluoroalkyl Substances in the Environment written by David M. Kempisty and published by CRC Press. This book was released on 2018-08-06 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Per- and polyfluorinated alkyl substances (PFAS), often referred to as per- (and poly) fluorinated compounds (PFCs), have been used for years in many everyday3⁄4 and some lifesaving3⁄4 products. However, their use has been linked to adverse health effects in humans, a problem compounded by their persistence in the environment. This book discusses the various challenges of PFAS in our environment today, including their historical use as well as their chemical and toxicological properties. It also presents robust discussion of analytical challenges and special considerations in sampling. The work goes on to give practical recommendations for dealing with these compounds in today's dynamic regulatory landscape and includes several chapters on various remediation techniques. Key Features: Comprehensive overview of per- and polyfluorinated alkyl substances (PFAS) historical use and chemical/physical properties which help us understand their persistence, transport, and transformation pathways in the environment In-depth analysis of PFAS toxicology Detailed descriptions of conventional and state-of-the-art remediation technologies Practical recommendations for dealing with PFAS in a dynamic regulatory landscape Robust discussion of important sampling and analytical considerations Perfluoroalkyl Substances in the Environment: Theory, Practice, and Innovation explores the challenges across the topical areas of regulation and management, toxicology, environmental remediation, and analytical sampling and analysis.Readers will find this text helpful in understanding complexities associated with PFAS and informing management strategies to effectively protect this and future generations.
Download or read book Spatial Modeling and Assessment of Environmental Contaminants written by Pravat Kumar Shit and published by Springer Nature. This book was released on 2021-02-05 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates the measurement, monitoring and mapping of environmental contaminants in soil & sediment, surface & groundwater and atmosphere. This book explores state-of-art techniques based on methodological and modeling in modern geospatial techniques specifically focusing on the recent trends in data mining techniques and robust modeling. It also presents modifications of and improvements to existing control technologies for remediation of environmental contaminants. In addition, it includes three separate sections on contaminants, risk assessment and remediation of different existing and emerging pollutants. It covers major topics such as: Radioactive Wastes, Solid and Hazardous Wastes, Heavy Metal Contaminants, Arsenic Contaminants, Microplastic Pollution, Microbiology of Soil and Sediments, Soil Salinity and Sodicity, Aquatic Ecotoxicity Assessment, Fluoride Contamination, Hydrochemistry, Geochemistry, Indoor Pollution and Human Health aspects. The content of this book will be of interest to researchers, professionals, and policymakers whose work involves environmental contaminants and related solutions.
Download or read book Handbook of Fluorous Chemistry written by John A. Gladysz and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by the leading experts John Gladysz, Dennis Curran, and István Horváth, this handbook is the first to summarize all the essential aspects of this emerging field of chemistry. Whether the reader is seeking an introduction to the concept of fluorous biphase catalysis, summaries of partition coefficients involving fluorous and organic solvents, or information on the latest fluorous mixture separation techniques, this authoritative compilation of contributions, written by the world's top authors, provides key information needed for successfully working with the diverse and fascinating families of fluorous molecules. The large number of reliable experimental procedures in particular makes this the ideal guide for newcomers wanting to use this elegant method in the laboratory. In addition, experts will also find a wealth of important information concisely contained in one ready reference. The result is an indispensable resource for everyone currently working or intending to work in this field.
Download or read book Natural Attenuation of Chlorinated Solvents Petroleum Hydrocarbons and Other Organic Compounds written by Bruce C. Alleman and published by . This book was released on 1999 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural attenuation was first demonstrated at sites with hydrocarbon contamination, but recent studies at sites contaminated by chlorinated compounds have shown that this approach often has merit for these more challenging contamination problems. This volume covers natural attenuation in media ranging from deep aquifers to shallow soils, and for contaminants ranging from fuels to solvents to herbicides, and offers the reader a comprehensive overview of case studies that represent the state of the art in natural attenuation approaches to site remediation.
