Processes Affecting Reductive Dechlorination Of Chlorinated Solvents By Zero Valent Iron

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Processes Affecting Reductive Dechlorination of Chlorinated Solvents by Zero-Valent Iron

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Author : Leah J. Matheson
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (455 download)

Book Synopsis Processes Affecting Reductive Dechlorination of Chlorinated Solvents by Zero-Valent Iron by : Leah J. Matheson

Download or read book Processes Affecting Reductive Dechlorination of Chlorinated Solvents by Zero-Valent Iron written by Leah J. Matheson and published by . This book was released on 1993 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zero-valent iron may participate in the reductive dechlorination process by three different mechanisms: direct, electrolytic reduction; reduction by hydrogen produced during the corrosion process; and reduction by dissolved (ferrous) iron that is also produced by corroding iron. The first step of electrolytic reduction is presumably, the transfer of one electron from the metal surface to the organic molecule. This results in an organic anion radical that may then lose a halide anion to give a carbon-centered radical, and oxidized iron, which is eventually released to the solution as Fe(2+). The goal of our research is to provide a comprehensive survey of the mechanisms that affect the performance of this reactive barrier technology.

Factors Affecting the Reductive Dechlorination of Carbon Tetrachloride by Zero-valent Iron

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Author : Amanda S. Mutziger
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.3/5 (121 download)

Book Synopsis Factors Affecting the Reductive Dechlorination of Carbon Tetrachloride by Zero-valent Iron by : Amanda S. Mutziger

Download or read book Factors Affecting the Reductive Dechlorination of Carbon Tetrachloride by Zero-valent Iron written by Amanda S. Mutziger and published by . This book was released on 1996 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Surface Mediated Reduction of Chlorinated Solvents by Zero-valent Iron

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Author : Timothy Lee Johnson
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (411 download)

Book Synopsis Surface Mediated Reduction of Chlorinated Solvents by Zero-valent Iron by : Timothy Lee Johnson

Download or read book Surface Mediated Reduction of Chlorinated Solvents by Zero-valent Iron written by Timothy Lee Johnson and published by . This book was released on 1997 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

In Situ Remediation of Chlorinated Solvent Plumes

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Author : Hans F. Stroo
Publisher : Springer Science & Business Media
ISBN 13 : 1441914013
Total Pages : 807 pages
Book Rating : 4.4/5 (419 download)

Book Synopsis In Situ Remediation of Chlorinated Solvent Plumes by : Hans F. Stroo

Download or read book In Situ Remediation of Chlorinated Solvent Plumes written by Hans F. Stroo and published by Springer Science & Business Media. This book was released on 2010-09-10 with total page 807 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late 1970s and early 1980s, our nation began to grapple with the legacy of past disposal practices for toxic chemicals. With the passage in 1980 of the Comprehensive Envir- mental Response, Compensation, and Liability Act (CERCLA), commonly known as Sup- fund, it became the law of the land to remediate these sites. The U. S. Department of Defense (DoD), the nation’s largest industrial organization, also recognized that it too had a legacy of contaminated sites. Historic operations at Army, Navy, Air Force, and Marine Corps facilities, ranges, manufacturing sites, shipyards, and depots had resulted in widespread contamination of soil, groundwater, and sediment. While Superfund began in 1980 to focus on remediation of heavily contaminated sites largely abandoned or neglected by the private sector, the DoD had already initiated its Installation Restoration Program in the mid-1970s. In 1984, the DoD began the Defense Environmental Restoration Program (DERP) for contaminated site assessment and remediation. Two years later, the U. S. Congress codified the DERP and directed the Secretary of Defense to carry out a concurrent program of research, development, and demonstration of innovative remediation technologies. As chronicled in the 1994 National Research Council report, “Ranking Hazardous-Waste Sites for Remedial Action,” our early estimates on the cost and suitability of existing techn- ogies for cleaning up contaminated sites were wildly optimistic. Original estimates, in 1980, projected an average Superfund cleanup cost of a mere $3.

Fundamentals of Site Remediation

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Author : John Pichtel
Publisher : Government Institutes
ISBN 13 : 159191972X
Total Pages : 460 pages
Book Rating : 4.5/5 (919 download)

Book Synopsis Fundamentals of Site Remediation by : John Pichtel

Download or read book Fundamentals of Site Remediation written by John Pichtel and published by Government Institutes. This book was released on 2007-08-24 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory manual addresses environmental site restoration practices that both ensure compliance with federal statutes and prevent further contamination or expense. It also includes up-to-date information and several new features to enhance the process. Emphasizing environmental chemistry, soil science, microbiology, plant science, and the underlying chemical processes, author John Pichtel discusses relevant chemical principles as they apply to the cleanup and removal of hazardous chemicals from soil, geological strata, and groundwater. The first part of this book provides an overview of the recent history of environmental contamination and the formulation of relevant regulations, leading to regulations for hazardous waste site remediation. This part also provides a background for several salient aspects of site remediation. The second part of the book closely examines field remediation technologies, including phytoremediation, bioremediation, and electrokinetic remediation. Theory of operation, practical considerations, and possible environmental impacts and other consequences of use are also discussed. Readers of the first edition will discover two new chapters in this Second Edition covering permeable reactive walls and technology selection. This updated edition now also includes end-of-chapter questions and instructions for completing two web-based exercises, one for the chapter on environmental site assessments and one for the chapter on technology selection.

Chlorinated Solvent Source Zone Remediation

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Author : Bernard H. Kueper
Publisher : Springer Science & Business
ISBN 13 : 1461469228
Total Pages : 759 pages
Book Rating : 4.4/5 (614 download)

Book Synopsis Chlorinated Solvent Source Zone Remediation by : Bernard H. Kueper

Download or read book Chlorinated Solvent Source Zone Remediation written by Bernard H. Kueper and published by Springer Science & Business. This book was released on 2014-04-22 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to help engineers and scientists better understand dense nonaqueous phase liquid (DNAPL) contamination of groundwater and the methods and technology used for characterization and remediation. Remediation of DNAPL source zones is very difficult and controversial and must be based on state-of-the-art knowledge of the behavior (transport and fate) of nonaqueous phase liquids in the subsurface and site specific geology, chemistry and hydrology. This volume is focused on the characterization and remediation of nonaqueous phase chlorinated solvents and it is hoped that mid-level engineers and scientists will find this book helpful in understanding the current state-of-practice of DNAPL source zone management and remediation.

Fates of Chlorine During Co-compustion of Chlorinated Plastics

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Author : Richard A. Larson
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Fates of Chlorine During Co-compustion of Chlorinated Plastics by : Richard A. Larson

Download or read book Fates of Chlorine During Co-compustion of Chlorinated Plastics written by Richard A. Larson and published by . This book was released on 1994 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Containment Technology Conference

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Author :
Publisher :
ISBN 13 :
Total Pages : 1168 pages
Book Rating : 4.3/5 (121 download)

Book Synopsis International Containment Technology Conference by :

Download or read book International Containment Technology Conference written by and published by . This book was released on 1997 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Chlorinated Solvent and DNAPL Remediation

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Author : Susan M. Henry
Publisher :
ISBN 13 :
Total Pages : 354 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis Chlorinated Solvent and DNAPL Remediation by : Susan M. Henry

Download or read book Chlorinated Solvent and DNAPL Remediation written by Susan M. Henry and published by . This book was released on 2003 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorinated Solvent and DNAPL Remediation addresses remediation of chlorinated solvents and dense nonaqueous phase liquids (DNAPLs) in groundwater and discusses remedial alternatives that are available for subsurface cleanup. Chlorinated Solvent and DNAPL Remediation: Innovative Strategies for Subsurface Cleanup focuses primarily on current technological developments and innovative applications for in situ remediation of chlorinated solvents including DNAPLs in soil and groundwater. However, this book also provides a general overview of all of the physical, chemical, and biological processes available for in situ remediation of groundwater contaminated with chlorinated solvents and DNAPLs. Chapters discuss surfactant flushing to enhance DNAPL removal; in situ chemical destruction by reduction processes involving zero valent iron or related metals; in situ chemical destruction by advanced oxidation processes; and in situ biological destruction by enhanced anaerobic bioremediation or natural bioattenuation. This book also emphasizes zero valent iron-based strategies, including reaction geochemistry, permeable reactive barrier longevity, rejuvenation of iron walls, and emplacement technique. One chapter summarizes 10 years of permeable reactive barrier development and application. The controversial issues related to DNAPL remediation, including the concept that remediation of sites affected by DNAPL could be technically impractical, are reviewed. Another chapter focuses on the evolution of DNAPL remediation practice.

Capstone Report on the Application, Monitoring, and Performance of Permeable Reactive Barriers for Ground-water Remediation: Performance evaluations at two sites

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Author :
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (327 download)

Book Synopsis Capstone Report on the Application, Monitoring, and Performance of Permeable Reactive Barriers for Ground-water Remediation: Performance evaluations at two sites by :

Download or read book Capstone Report on the Application, Monitoring, and Performance of Permeable Reactive Barriers for Ground-water Remediation: Performance evaluations at two sites written by and published by . This book was released on 2003 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Investigations of Reductive Dechlorination Reactions of Chlorinated Ethenes and Ethanes on Zero-valent Metals Using Compound Specific Isotopic Analysis

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Author : Nancy Anne VanStone
Publisher :
ISBN 13 : 9780494157541
Total Pages : 426 pages
Book Rating : 4.1/5 (575 download)

Book Synopsis Investigations of Reductive Dechlorination Reactions of Chlorinated Ethenes and Ethanes on Zero-valent Metals Using Compound Specific Isotopic Analysis by : Nancy Anne VanStone

Download or read book Investigations of Reductive Dechlorination Reactions of Chlorinated Ethenes and Ethanes on Zero-valent Metals Using Compound Specific Isotopic Analysis written by Nancy Anne VanStone and published by . This book was released on 2006 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reductive dechlorination reactions occurring on zero-valent metal surfaces for chlorinated ethenes and chlorinated ethanes are investigated using compound specific isotopic analysis (CSIA) to measure carbon isotopic fractionation and carbon kinetic isotope effects (KIE). Reductive dechlorination of chlorinated contaminants on zero-valent iron (Fe0) is used for remediation purposes at over 100 sites worldwide employing permeable reactive barrier (PRB) technology. Degradation can occur via 3 main pathways: (1) alpha-elimination, (2) beta-elimination and (3) hydrogenolysis. Experiments documenting carbon isotopic fractionation observed during degradation of a suite of chlorinated ethenes are described, and it is demonstrated that reproducible carbon isotopic fractionation occurs for perchloroethene (PCE), trichloroethene (TCE), cis-dichloroethene (cis-DCE) and vinyl chloride (VC). The results for Fe0 from two different sources show distinct differences in both rates of reaction and isotopic fractionation factors (epsilon), particularly for the cis-DCE and VC. Using ground water samples from pre- and post-treatment of a Fe0 PRB at F.E. Warren Air Force Base, it is established that carbon isotopic fractionation of chlorinated ethenes follows the same principles under field conditions, and it is shown that CSIA, in combination with traditional compositional analysis, can help to resolve complex performance-related problems for PRBs. Finally, it is demonstrated that reaction pathways and mechanisms can be investigated using CSIA and ranges of epsilon and KIE are established for the investigated reactions on different zero-valent metals. In batch experiments monitoring dichloroethane (DCA) degradation on Zn0, CSIA was used to determine that a common rate limiting step occurs for hydrogenolysis and alpha-elimination reactions of 1,1-DCA. As well, overall epsilon and KIE are greater for beta-elimination of 1,2-DCA than for hydrogenolysis and alpha-elimination of 1,1-DCA. The degradation of a chlorinated ethene, cis-DCE, was investigated on Fe0. Direct measurements of epsilon and KIE for hydrogenolysis and beta-elimination were measured using CSIA. It is established that these reactions do not share a rate limiting step, and unique and reproducible carbon isotopic fractionation is associated with each reaction pathway. CSIA has been shown to be a versatile tool, aiding research as both a reliable diagnostic (i.e. identification of degradation) and as a valuable analytical instrument for mechanistic studies.

Fundamentals of Hazardous Waste Site Remediation

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Author : Kathleen Sellers
Publisher : Routledge
ISBN 13 : 1351446541
Total Pages : 336 pages
Book Rating : 4.3/5 (514 download)

Book Synopsis Fundamentals of Hazardous Waste Site Remediation by : Kathleen Sellers

Download or read book Fundamentals of Hazardous Waste Site Remediation written by Kathleen Sellers and published by Routledge. This book was released on 2018-10-03 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every practicing environmental engineer should already have a firm grasp on the basics of hazardous waste site remediation-the key to confronting a site problem, and devising an effective solution. Since their original introduction to remediation, technology has kept moving ahead with new ideas and procedures. Fundamentals of Hazardous Waste Site Remediation gives environmental professionals immediate access to the basics of the trade, along with information about recent advancements. This comprehensive overview examines the basics of such areas as hazardous materials chemistry, hydrogeology, reaction engineering, and clean-up level development. A chapter on Cost Estimating will be of particular interest to specialists, in light of recent concerns about the increased costs of remediation. After reading each chapter, test your new knowledge with the review problems. As a refresher guide for career environmental engineers, or a helpful tool to newcomers in the field, Fundamentals of Hazardous Waste Site Remediation is a valuable resource for longtime professionals and newcomers alike.

Capstone report on the application, monitoring, and performance of permeable reactive barriers for groundwater remediation : Volume 1. Performance evaluations at two sites

Download Capstone report on the application, monitoring, and performance of permeable reactive barriers for groundwater remediation : Volume 1. Performance evaluations at two sites PDF Online Free

Author :
Publisher : DIANE Publishing
ISBN 13 : 1428900055
Total Pages : 156 pages
Book Rating : 4.4/5 (289 download)

Book Synopsis Capstone report on the application, monitoring, and performance of permeable reactive barriers for groundwater remediation : Volume 1. Performance evaluations at two sites by :

Download or read book Capstone report on the application, monitoring, and performance of permeable reactive barriers for groundwater remediation : Volume 1. Performance evaluations at two sites written by and published by DIANE Publishing. This book was released on 2003 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Reductive Dechlorination of Chlorinated Aliphatic and Aromatic Compounds Using Zero Valent Metals

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Author : Young-Hun Kim
Publisher :
ISBN 13 :
Total Pages : 320 pages
Book Rating : 4.:/5 (435 download)

Book Synopsis Reductive Dechlorination of Chlorinated Aliphatic and Aromatic Compounds Using Zero Valent Metals by : Young-Hun Kim

Download or read book Reductive Dechlorination of Chlorinated Aliphatic and Aromatic Compounds Using Zero Valent Metals written by Young-Hun Kim and published by . This book was released on 1999 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nanoscale Zerovalent Iron Particles for Environmental Restoration

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Author : Tanapon Phenrat
Publisher : Springer
ISBN 13 : 3319953400
Total Pages : 611 pages
Book Rating : 4.3/5 (199 download)

Book Synopsis Nanoscale Zerovalent Iron Particles for Environmental Restoration by : Tanapon Phenrat

Download or read book Nanoscale Zerovalent Iron Particles for Environmental Restoration written by Tanapon Phenrat and published by Springer. This book was released on 2019-01-31 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first complete edited volume devoted to providing comprehensive and state-of-the art descriptions of science principles and pilot- and field-scaled engineering applications of nanoscale zerovalent iron particles (NZVI) for soil and groundwater remediation. Although several books on environmental nanotechnology contain chapters of NZVI for environmental remediation (Wiesner and Bottero (2007); Geiger and Carvalho-Knighton (2009); Diallo et al. (2009); Ram et al. (2011)), none of them include a comprehensive treatment of the fundamental and applied aspects of NZVI applications. Most devote a chapter or two discussing a contemporary aspect of NZVI. In addition, environmental nanotechnology has a broad audience including environmental engineers and scientists, geochemists, material scientists, physicists, chemists, biologists, ecologists and toxicologists. None of the current books contain enough background material for such multidisciplinary readers, making it difficult for a graduate student or even an experienced researcher or environmental remediation practitioner new to nanotechnology to catch up with the massive, undigested literature. This prohibits the reader from gaining a complete understanding of NZVI science and technology. In this volume, the sixteen chapters are based on more than two decades of laboratory research and development and field-scaled demonstrations of NZVI implementation. The authors of each chapter are leading researchers and/or practitioners in NZVI technology. This book aims to be an important resource for all levels of audiences, i.e. graduate students, experienced environmental and nanotechnology researchers, and practitioners evaluating environmental remediation, as it is designed to involve everything from basic to advanced concepts.

Environmental Monitoring and Biodiagnostics of Hazardous Contaminants

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Author : M. Healy
Publisher : Springer Science & Business Media
ISBN 13 : 9401714452
Total Pages : 337 pages
Book Rating : 4.4/5 (17 download)

Book Synopsis Environmental Monitoring and Biodiagnostics of Hazardous Contaminants by : M. Healy

Download or read book Environmental Monitoring and Biodiagnostics of Hazardous Contaminants written by M. Healy and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years public awareness of the long term toxic affects heavy metal ions in waters and wastewaters has increased significantly. Environmental agencies have been imposing more and more stringent discharge limits on industries involved in processes using metal ions. Numerous industries produce aqueous effluents con taining metal ions and particularly copper and cadmium. Copper sulfate is used on a large scale in the electroplating industries. In addition, copper salts are used as fungicides, timber preservatives, insecticides, paint corrosion inhibitors and in dyestuffs. Cadmium is used in the manufacture of nickel-cadmium batteries, as a corrosion inhibitor and control rods in the nuclear industry. The European Com munity has listed cadmium as one of the most dangerous metal due to its toxicity, persistence and bioaccumulation in List 1 of its Directive 76/464/EEC. Therefore, it is important that methods for the removal of these metal ions are found and that the mechanism of removal is characterized and understood. A number of adsorb ents have been identified which are capable of removing copper (Panday et aI. , 1985; Ho et aI. , 1996; Low and Lee, 1987; Low et aI. , 1993; Quek et aI. , 1998) and cadmium (Battacharya and Venkobachar, 1984; Namasivayam and Ranganathan, 1995; Periasamy and Namasivayam, 1994) from aqueous solutions. Sorption kin etic models have been proposed for some systems.

In Situ Remediation Technology Status Report

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Author :
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (359 download)

Book Synopsis In Situ Remediation Technology Status Report by :

Download or read book In Situ Remediation Technology Status Report written by and published by . This book was released on 1995 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: