Download or read book Removal of Perfluorinated Compounds in Drinking Water Treatment written by Chuan Liu and published by . This book was released on 2017 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfluorinated compounds (PFCs) are emerging contaminants which have been detected in various environmental compartments, including drinking water sources. Because of their potential risks to human health, PFCs in drinking water systems have been studied at an increasing rate in recent years. Among all the PFCs, perfluoroalkyl carboxylic acids (PFCAs) and perfluoralkyl sulfonic acids (PFSAs) are two common classes; while perfluorinated phosphonic acids (PFPAs) are a type of PFCs, which have only been detected in the environment in the past few years. As the two most commonly detected PFCs, perfluorooctanoic acid (PFOA) and perfluorooctanoic sulfonate (PFOS) have been included in USEPA's fourth Contaminant Candidate List (CCL4) recently. In terms of treatment, ion exchange batch studies showed promising results for PFC removal. Nanoparticles are novel and promising adsorbents due to their high specific surface areas and other properties. The overall objective of this study is to investigate more efficient approaches to remove PFCs by ion exchange and adsorption processes in drinking water systems, including the application of anion exchange resins and nanoparticles, studying the influence of PFC characteristics on these processes, and the impact of water qualities, especially the effects of natural organic matter (NOM) and inorganic anions. A liquid chromatography tandem mass spectrometry (LC-MS/MS) method was adapted for analyzing seven PFCAs, three PFSAs, and three PFPAs in water samples. Solid phase extraction (SPE) was applied to concentrate water samples and to reach lower detection limits. Both the LC parameters and the multiple reaction monitoring (MRM) conditions of the MS/MS were optimized to reach short retention times, good sensitivity, and nice peak shapes for the selected PFCs. The method detection limits (MDLs) for PFCAs and PFSAs ranged from 0.1 to 1.0 ng/L, while the MDLs for PFPAs were 5.0 to 5.1 ng/L. Four PFCAs and three PFSAs were then selected as target PFCs in subsequent removal studies. Five commercially available anion exchange resins with different properties were chosen to test their PFCs removals in both ultrapure and Grand River water in batch studies. In ultrapure water, all resins had high removals of over 80% for all target PFCs. In Grand River water, all resins had decreased PFC removals though they varied with different types of PFCs. PFSAs had higher removals than PFCAs and short chain PFCs were less removed than long chain PFCs. Based on these results, TAN-1 and PFA444 were selected as target resins to study single compound isotherms in ultrapure water, PFC removal in Lake Erie water, and the effect of inorganic anions. These studies proved that the decrease of PFC removals in surface water was caused by competition from both NOM and inorganic anions. The existence of sulfate in water could decrease PFCs removal, especially short chain PFCAs. Based on the PFC results above, TAN-1, PFA444 and A555 were selected as target anion exchange resins for regeneration batch studies. Regeneration conditions for selected anion exchange resins including regenerant types, cation types, and solvent types were tested in batch studies. The use of higher concentration of the regenerant salts, Na+ ions, and methanol can enhance the PFCs regeneration performance. Short chain PFCs had higher regeneration rates than long chain PFCs, and PFCAs had better regeneration performance compared to PFSAs. A555 had the best regeneration performance among the three selected resins; thus it was chosen as target resin for column tests. In the column regeneration tests, the regeneration conditions of 5% NaCl and 10 ml/min flow rate had the best regeneration performance. In the anion exchange column experiment using Grand River water, the breakthrough of all PFCs gradually increased from 20% after 100000 BV, to 90% breakthrough after 220000 BV. Magnetic nanoparticles with three different modified polymers were designed for PFC removal and synthesized. They were applied in PFC removal kinetic experiments in both ultrapure water and Grand River water. All magnetic nanoparticles achieved short equilibrium times of less than 10 hours in both waters. Magnetic nanoparticles modified with polymer p-DADMAC (N1) had the best PFC removal among all three nanoparticles in both waters. In Grand River water, the PFC removal of all three nanoparticles decreased substantially. NOM rather than inorganic anions was shown to be the main competitor for PFC removal by nanoparticles in surface water. The approach of using synthesized magnetic nanoparticles has potential to remove PFCs and should be further pursued.

Download or read book Polyfluorinated Chemicals and Transformation Products written by Thomas P. Knepper and published by Springer Science & Business Media. This book was released on 2011-09-21 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to their unparalleled effectiveness and efficiency, polyfluorinated chemicals (PFC) have become essential in numerous technical applications. However, many PFCs brought to market show limited biodegradability, and their environmental persistence combined with toxic and bioaccumulative potential have become a matter of concern in some instances. This volume highlights the synthesis of PFCs, focusing on substances with improved application and environmental properties, which are a challenge for synthetic chemists. Further, modern mass spectrometric techniques for the detection and identification of biotransformation products of PFCs are described. The sorption and leaching behavior of PFC in soil is also addressed in order to predict their fate in the environment. Several contributions discuss the monitoring of PFCs in European surface, ground and drinking waters, treatment options for PFC removal from drinking water, occurrence in food, and the human biomonitoring of PFCs.

Download or read book Stantec s Water Treatment written by John C. Crittenden and published by John Wiley & Sons. This book was released on 2022-11-08 with total page 1956 pages. Available in PDF, EPUB and Kindle. Book excerpt: The updated third edition of the definitive guide to water treatment engineering, now with all-new online content Stantec's Water Treatment: Principles and Design provides comprehensive coverage of the principles, theory, and practice of water treatment engineering. Written by world-renowned experts in the field of public water supply, this authoritative volume covers all key aspects of water treatment engineering, including plant design, water chemistry and microbiology, water filtration and disinfection, residuals management, internal corrosion of water conduits, regulatory requirements, and more. The updated third edition of this industry-standard reference includes an entirely new chapter on potable reuse, the recycling of treated wastewater into the water supply using engineered advanced treatment technologies. QR codes embedded throughout the book connect the reader to online resources, including case studies and high-quality photographs and videos of real-world water treatment facilities. This edition provides instructors with access to additional resources via a companion website. Contains in-depth chapters on processes such as coagulation and flocculation, sedimentation, ion exchange, adsorption, and gas transfer Details membrane filtration technologies, advanced oxidation, and potable reuse Addresses ongoing environmental concerns, pharmacological agents in the water supply, and treatment strategies Describes reverse osmosis applications for brackish groundwater, wastewater, and other water sources Includes high-quality images and illustrations, useful appendices, tables of chemical properties and design data, and more than 450 exercises with worked solutions Stantec's Water Treatment: Principles and Design, Updated Third Edition remains an indispensable resource for engineers designing or operating water treatment plants, and is an essential textbook for students of civil, environmental, and water resources engineering.

Download or read book Removal of Perfluorinated Compounds from Ultrapure and Surface Waters by Adsorption and Ion Exchange written by Rahman Mohammad Feisal and published by . This book was released on 2014 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfluorinated compounds (PFCs) have been detected globally in drinking water at trace concentrations. This is attributable to the chemical properties that characterize these compounds: strong saturated carbon-fluorine bonds which make them resistant to chemical, physical, and biological degradation. Manufacturing wastes, sewage treatment plants, and leaching from consumer products are the primary pathways by which PFCs enter the environment. Drinking water occurrence studies indicate that PFCs, if present in source water, can pass through drinking water treatment processes and be present in finished drinking water. While they are currently not regulated, several PFCs have been included in the USEPA's 3rd unregulated contaminant monitoring list. As yet there is no clear understanding of the fate of PFCs during drinking water treatment. Full-scale surveys and bench-scale studies indicate that activated carbon adsorption and ion exchange treatment may be effective. Elucidation of the fate of selected PFCs at environmentally relevant concentrations during granular activated carbon (GAC) and ion exchange treatment was the primary objective of this research.

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 Perfluorinated Chemicals PFCs written by Nicholas P. Cheremisinoff and published by John Wiley & Sons. This book was released on 2016-12-06 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume provides a timely study on the environmental challenges from a specific class of perfluorinated chemical compounds (PFCs) that are now being recognized as a worldwide health threat. Recent studies report that levels of classes of PFCs known as polyfluoroalkyl and perfluoroalkyl (PFASs) exceed federally recommended safety levels in public drinking-water supplies for 6 million people in the United States and that as many as 100 million people could be at risk from exposure to these chemicals. These chemicals occur globally in wildlife and humans. Both PFCAs and PFSAs have been produced for more than 50 years, but have only become of interest to regulators and environmentalists since the late 1990s. Recent advances in analytical methodology has enabled widespread detection in the environment and humans at trace levels. These toxic chemicals have been found in outdoor and indoor air, surface and drinking water, house dust, animal tissue, human blood serum, and human breast milk. Of great concern to communities is the presence of these compounds in a number of drinking water supplies in the U.S. and other countries. This new volume provides a timely explanation of the chemicals, provides a detailed review of the regulations both in the US and European Community, explains the health risk literature, and then explores in great detail available treatment technologies. The volume is a must for public water supply facilities, industrial operations that have historically used these chemicals and face legacy pollution issues, policy makers and the general public.

Download or read book Drinking Water Contaminant Candidate List written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The cost of inaction written by Gretta Goldenman and published by Nordic Council of Ministers. This book was released on 2019-03-17 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: PFAS (per and polyfluoroalkylsubstances) are known to be extremely difficult to degrade in the environment and to be bioaccumulative and toxic. Exposure to PFAS is suspected to increase the risk of adverse health effects, such as impacts on the thyroid gland, the liver, fat metabolism and the immune system. This study estimates the socioeconomic costs that may result from impacts on human health and the environment from the use of PFAS. Better awareness of the costs and problems associated with PFAS exposure will assist decision-makers and the general public to make more efficient and timely risk management decisions. Findings indicate that the costs are substantial, with annual health-related costs estimated to 2.8 – 4.6 billion EUR for the Nordic countries and 52 – 84 billion EUR for all EEA countries. Overall non-health costs are estimated at 46 million – 11 billion EUR for the Nordic countries.Upon request the excel spreadsheets used for the monetarisation and valuation in this report can also be provided along with a guidance on how to use the estimation of costs for value transfer. Please contact any of the consultants or members of the steering group from the Swedish Chemicals Agency or the Danish Environmental Protection Agency if you are interested in receiving these excel spreadsheets.

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 Per and polyfluorinated substances in the Nordic Countries written by Stefan Posner and published by Nordic Council of Ministers. This book was released on 2013-06-19 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Tema Nord report presents a study based on open information and custom market research to review the most common perfluorinated substances (PFC) with less focus on PFOS and PFOA. The study includes three major parts:1) Identification of relevant per-and polyfluorinated substances and their use in various industrial sectors in the Nordic market by interviews with major players and database information; 2) Emissions to and occurence in the Nordic environment of the substances described in 1); 3) A summary of knowledge of the toxic effects on humans and the environment of substances prioritized in 2); There is a lack of physical chemical data, analystical reference substances, human and environmental occurrence and toxicology data, as well as market information regarding PFCs other than PFOA and PFOS and the current legislation cannot enforce disclosure of specific PFC substance information.

Download or read book Physico Chemical Wastewater Treatment and Resource Recovery written by Robina Farooq and published by BoD – Books on Demand. This book was released on 2017-05-03 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book on Physico-Chemical Treatment of Wastewater and Resource Recovery provides an efficient and low-cost solution for remediation of wastewater. This book focuses on physico-chemical treatment via advanced oxidation process, adsorption, its management and recovery of valuable chemicals. It discusses treatment and recovery process for the range of pollutants including BTX, PCB, PCDDs, proteins, phenols, antibiotics, complex organic compounds and metals. The occurrence of persistent pollutants poses deleterious effects on human and environmental health. Simple solutions for recovery of valuable chemicals and water during physico-chemical treatment of wastewater are discussed extensively. This book provides necessary knowledge and experimental studies on emerging physico-chemical processes for reducing water pollution and resource recovery.

Download or read book Drinking Water Principles And Practices written by Hans J C Van Dijk and published by World Scientific. This book was released on 2006-11-24 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique volume provides a comprehensive overview of all the major aspects of modern drinking water systems in the western European context. It not only covers the theoretical principles, but also the historical background and practical aspects of design and operation, legislation, planning and finance of drinking water supply in its social and economic context.The principles and practices are illustrated using experiences from The Netherlands. The Dutch drinking water supply is well known for its multiple barrier systems and high technical standards. The Dutch drinking water is of high quality and does not contain chlorine, and the Dutch therefore readily drink tap water and do not see the need to buy bottled water or in-house filters, with their drawbacks on national economics, public health and the environment. This illustrative overview can be used as a reference for other countries and regions.

Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.

Download or read book Reverse Osmosis and Nanofiltration written by American Water Works Association and published by Amer Water Works Assn. This book was released on 1998 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the processes of membrane technologies applications, used in the treatment of water sources and by medical professionals for kidney dialysis, and is a helpful research tool for engineers, scientists, administrators, and educators seeking an introduction to these processes. Covers history and theory, design and equipment, regulations, and more.

Download or read book Organofluorine Chemistry written by R.E. Banks and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past fifteen years commercial interest in compounds containing carbon fluorine bonds has burgeoned beyond all expectations, mainly owing to business opportunities arising from work on biologically active fluoroorganics-particularly agrochemicals, the relentless search for new markets for fluoropolymers and fluoro carbon fluids, developments in the field of medical diagnostics, and the drive to find replacements for ozone-depleting CFCs and Halon fire-extinguishing agents. Judging the situation to warrant the publication of a comprehensive collection of up-to-date reviews dealing with commercial organofluorine compounds within a single volume of manageable size (and hence reasonable cost), we were delighted to be invited by Plenum Publishing Corporation to produce a suitable book. In order to provide an authentic and wide-ranging account of current commercial applications of fluoroorganic materials, it clearly was necessary to assemble a sizeable team of knowledgeable contributing authors selected almost entirely from industry. Through their efforts we have been able to produce an almost complete coverage of the modem organofluorochemicals business in a manner designed to attract a reader ship ranging from experts in the field, through chemists and technologists currently unaware of the extent of industrial involvement with fluoroorganics, to students of applied chemistry. Promised chapters dedicated to perfluoroolefin oxides and 18F labeling of radiopharmaceuticals failed to materialize. This is somewhat unfortunate in view of our aim to achieve comprehensive coverage of the subject.

Download or read book The Seine River Basin written by Nicolas Flipo and published by Springer Nature. This book was released on 2021-01-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book reviews the water-agro-food and socio-eco-system of the Seine River basin (76,000 km2), and offers a historical perspective on the river’s long-term contamination. The Seine basin is inhabited by circa 17 million people and is impacted by intensive agricultural practices and industrial activities. These pressures have gradually affected its hydrological, chemical and ecological functioning, leading to a maximum chemical degradation between the 1960s and the 1990s. Over the last three decades, while major water-quality improvements have been observed, new issues (e.g. endocrine disruptors, microplastics) have also emerged. The state of the Seine River network, from the headwaters to estuary, is increasingly controlled by the balance between pressures and social responses. This socio-ecosystem provides a unique example of the functioning of a territory under heavy anthropogenic pressure during the Anthropocene era. The achievements made were possible due to the long-term PIREN Seine research program, established in 1989 and today part of the French socio-ecological research network “Zones Ateliers”, itself part of the international Long-term Socio-economic and Ecological Research Network (LTSER). Written by experts in the field, the book provides an introduction to the water budget and the territorial metabolism of the Seine basin, and studies the trajectories and impact of various pollutants in the Seine River. It offers insights into the ecological functioning, the integration of agricultural practices, the analysis of aquatic organic matter, and the evolution of fish assemblages in the Seine basin, and also presents research perspectives and approaches to improve the water quality of the Seine River. Given its scope, it will appeal to environmental managers, scientists and policymakers interested in the long-term contamination of the Seine River.

Download or read book Groundwater Geochemistry written by Sughosh Madhav and published by John Wiley & Sons. This book was released on 2021-06-14 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains both practical and theoretical aspects of groundwater resources relating to geochemistry. Focusing on recent research in groundwater resources, this book helps readers to understand the hydrogeochemistry of groundwater resources. Dealing primarily with the sources of ions in groundwater, the book describes geogenic and anthropogenic input of ions into water. Different organic, inorganic and emerging contamination and salinity problems are described, along with pollution-related issues affecting groundwater. New trends in groundwater contamination remediation measures are included, which will be particularly useful to researchers working in the field of water conservation. The book also contains diverse groundwater modelling examples, enabling a better understanding of water-related issues and their management. Groundwater Geochemistry: Pollution and Remediation offers the reader: An understanding of the quantitative and qualitative challenges of groundwater resources An introduction to the environmental geochemistry of groundwater resources A survey of groundwater pollution-related issues Recent trends in groundwater conservation and remediation Mathematical and statistical modeling related to groundwater resources Students, lecturers and researchers working in the fields of hydrogeochemistry, water pollution and groundwater will find Groundwater Geochemistry an essential companion.