Given the presence of a wide variety of contaminants in the environment, it is important to understand what drives a contaminant from one medium to another, as well as the manner and extent to which a contaminant associates with the different media or phases within a local environmental system. Partition and Adsorption of Organic Contaminants in Environmental Systems forms a comprehensive resource on the behavioral characteristics of contaminants so that appropriate strategies can be adopted to either prevent or minimize their adverse impacts on human welfare and natural resources. Cary Chiou’s far-reaching text depicts the processes by which nonionic organic contaminants are sorbed to natural biotic and abiotic substances. This book focuses on physical principles and system parameters that affect the contaminant uptake by soil from water, air, and other media; by fish from water; and by plants from soil and water. As contaminant uptake by natural organic substances is often predominantly a partition interaction, the partition characteristics in several solvent-water model mixtures are treated in detail to elucidate the relevant physicochemical parameters. The account of contaminant sorption to soils, fish, and plants is strengthened by companion chapters on: Fundamentals of solution theory Interphase partition equations Fundamentals of adsorption theory Vapor adsorption on mineral and carbonaceous solids No other single source in the field delivers as compelling a combination of background understanding and «state-of-the-science» comprehension of current issues. Ideally suited for a graduate-level environmental course, Partition and Adsorption of Organic Contaminants in Environmental Systems also serves as a technical guide to current and future research in the field.
Solid-phase synthesis of carbohydrates presents unique challenges to synthetic chemists and currently represents one of the hottest areas of research in bioorganic chemistry. Solid Support Oligosaccharide Synthesis and Combinatorial Carbohydrate Libraries addresses the exciting expectation that solid-phase assembly of oligosaccharides will have a fundamental impact on the field of glycobiology. This publication details the methodologies currently investigated for the attachment of carbohydrates to beads, synthesis including coupling strategies, and removal of the product from beads. With chapters written by eminent contributing authors, the material explores different synthetic strategies, glycosylation protocols, the use of solid supports versus soluble polymeric supports, and «on-resin» analytical methods. Tremendous progress in the field has set the stage for Solid Support Oligosaccharide Synthesis and Combinatorial Carbohydrate Libraries to provide a wealth of information on such topics as: Specific oligosaccharide structures used in signal transduction processes Preparation and screening of glycopeptide libraries Solid-phase carbohydrate synthesis
The most useful reactions of organonitro compounds in organic synthesis Compounds containing nitro groups are useful intermediates for the synthesis of natural products and other complex organic molecules. The Nitro Group in Organic Synthesis focuses on reactions that proceed under mild conditions, important functional groups that can be synthesized by conversion of nitro groups, and the stereoselectivity of reactions of nitro compounds. These issues are of great importance to practicing researchers in today's pharmaceutical, agrochemical, and fine chemical industries. The Nitro Group in Organic Synthesis also emphasizes environmentally-friendly methods for nitration, the importance of aliphatic nitro compounds, and modern preparation of nitro compounds. Other topics discussed include: Henry reaction Asymmetric Michael addition Alkylation, acylation, halogenation, and related reactions of RNO2 Substitution and elimination of NO2 and RNO2 The Nitro Group in Organic Synthesis is a useful resource for researchers and students in organic and medicinal chemistry.
The Drinking Water Act Amendments of 1996 instituted wide-ranging regulatory changes to the seminal Safe Drinking Water Act (SDWA)-such as providing funding to communities facing health risks, focusing regulatory efforts on contaminants posing such health risks, and adding flexibility to the regulatory process- and the amendments continue to shape regulations and regulatory policy to this day. Editor Frederick Pontius's Drinking Water Regulation and Health provides a comprehensive, up-to-date resource on the current regulatory landscape. Drinking Water Regulation and Health serves as a guide for water utilities, regulators, and consultants, forecasting future trends and explaining the latest developments in regulations. A diverse group of contributors covers topics such as water treatment, water protection, how some of the regulations have been interpreted in the courts, how water utilities can stay in compliance, and how to satisfy customer expectations, especially sensitive subpopulations. Divided into four sections – The SDWA and Public Health, Regulation Development, Contaminant Regulation and Treatment, and Compliance Challenges – the book includes chapters on: * Improving Waterborne Disease Surveillance * Application of Risk Assessments in Crafting Drinking Water Regulations * Control of Drinking Water Pathogens and Disinfection By-Products * Selection of Treatment Technology for SDWA Compliance * Death of the Silent Service: Meeting Consumer Expectations * Achieving Sustainable Water Systems * What Water Suppliers Need to Know About Toxic Tort Litigation
The activated sludge process is the most versatile, commonly used wastewater treatment system in North America; however, many activated sludge processes frequently experience operational problems related to poor compaction or settleability of secondary solids and loss of secondary solids from the clarifier. Eschewing the technical jargon and copious chemical equations found in the majority of wastewater studies, Settleability Problems and Loss of Solids in the Activated Sludge Process speaks directly to plant operators, showing them how to identify and solve common problems and achieve maximum efficiency. Michael H. Gerardi’s hands-on guide addresses the most common plant operational problems, such as increased costs, loss of treatment efficiency, and permit violations. Using numerous tables and illustrations, Settleability Problems provides microscopic and analytical techniques for troubleshooting and identifying the conditions responsible for settleability problems and loss of solids. It includes pictures of wet mounts and smears of acceptable and unacceptable microscopic conditions of the activated sludge and presents corrective measures for operational problems. Chapters include: Undesired Filamentous Growth Nutrient-Deficient Floc Particles Denitrification Slug Discharge of Soluble cBOD Viscous Bulking or Zoogloeal Growth Production and Accumulation of Foam and Scum Volume II in the series, Settleability Problems will prove to be of unparalleled value to wastewater treatment plant operators as well as students of wastewater microbiology.
Aniline is the parent molecule of a vast family of aromatic amines. Since its discovery in 1826 it has become one of the hundred most important building blocks in chemistry. Aniline is used as an intermediate in many different fields of applications, such as isocyanates, rubber processing chemicals, dyes and pigments, agricultural chemicals and pharmaceuticals. The understanding of functional groups is key for the understanding of all organic chemistry. In the tradition of the Patai Series, this volume treats all aspects of this functional group. It contains chapters on the theoretical and computational foundations; on analytical and spectroscopical aspects with dedicated chapters on Mass Spectrometry, NMR, IR/UV, etc.; on reaction mechanisms; on applications in syntheses.
A knowledge of the chemical structure and concentration of organometal compounds throughout the ecosystem is important in working out the pathways and mechanisms by which metals distribute themselves throughout the environment. Treating the topic as an integrated subject area, the Second Edition of Organometallic Compounds in the Environment covers all the recent developments in analytical techniques and reports all the new work that has been achieved since the first book. Covers the general importance and characteristics of organometallic species. Includes general developments in analytical techniques. Discusses several minority elements including antimony and selenium. The book addresses the subject in a single, manageable size and each chapter can be used either as a single review or sequentially within the topic area. A useful resource for all researchers and scientists in industry working with organometallic compounds, including, chemists, environmentalists and ecologists.
The Chemistry of Peroxides is a new volume in the Chemistry of Functional Groups series. This series covers all aspects of organic chemistry with each volume containing chapters on: General and theoretical aspects Computational approaches Thermodynamics and kinetics NMR and ESR Mass Spectrometry Spectroscopies Analytical aspects Reaction mechanisms Syntheses Biological effects Environmental effects Industrial applications Edited by Zvi Rappoport, this series provides outstanding reviews on all aspects of functional groups in analytical, physical, synthetic and applied chemistry.
N-heterocyclic carbenes (NHCs) have found increasing use as reagents for a range of organic transformations and in asymmetric organocatalysis. The performance of these molecules can be improved and tuned by functionalisation. Functionalised carbenes can anchor free carbenes to the metal site, introduce hemilability, provide a means to immobilise transition metal carbene catalysts, introduce chirality, provide a chelate ligand or bridge two metal centres. NHC can be attached to carbohydrates and campher, derived from amino acids and purines, they can be used as organocatalysts mimicking vitamin B1 or as weak “solvent” donors in lanthanide chemistry. Functionalised N-Heterocyclic Carbene Complexes describes major trends in functionalised NHC ligands, aiming to assist readers in their attempts to develop and apply their own functionalised carbenes. After an introduction to the chemistry and behaviour of NHC, the book gives a detailed description of functionalised carbenes and their complexes according to a range of functional groups, each with a discussion of the synthetic route, structure, stability and performance. Functionalised N-Heterocyclic Carbene Complexes is an essential guide to fine-tuning this important class of compounds for practitioners, researchers and advanced students working in synthetic organometallic and organic chemistry and catalysis.
This book coves one of the most important areas in analytical sciences, extraction techniques for organic compounds in environmental and related matrices. This text discusses all of the key stages for analysing a sample for organic compounds from the initial sampling protocols, the range of different extraction techniques for solid, liquid and air samples through to the final chromatographic analysis. The topics covered include: Initial steps for solid, aqueous and air sampling. Extraction techniques for aqueous samples, including LLE, purge and trap, SPE, SPME, SBSE, SDME, membrane microextraction and MPES. Extraction techniques for solid samples, including Soxhlet, 'Soxtec', Shake-flask, sonication, PFE, MAE, SFE and MSPD. Extraction techniques for air sampling, including whole air, enrichment approaches and desorption techniques. Pre-concentration approaches for post-extraction. Practical aspects for chromatographic analysis (GC and HPLC) of organic compounds. Quality assurance aspects of analysis. Health and safety considerations. Key features include: Up-to-date information on the latest development in extraction techniques for organic compounds in environmental and food matrices. Ideal for use as a self-study guide, as the basis of a taught course or guided reading for new 'early-career' researchers. Includes a guide for the reader to other sources of information. Extraction Techniques in Analytical Sciences is suitable for undergraduate and postgraduate students, as well as providing an invaluable starting point for individuals undertaking applied research in the fields of analytical, bioanalytical, environmental and food sciences. The Analytical Techniques in the Sciences series of books provides coverage of all of the major analytical techniques and their application in the most important areas of physical, life and materials science. Each text is presented in an open learning/distance learning style, in which the learning objectives are clearly identified. the reader's understanding of the material is constantly evaluated by the use of self-assessment and discussion questions.