Integration Of Zero Valent Metals And Chemical Oxidation For The Destruction Of 246 Trinitrotoluene Within Aqueous Matrices

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Integration of Zero-Valent Metals and Chemical Oxidation for the Destruction of 2,4,6-Trinitrotoluene Within Aqueous Matrices

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (654 download)

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Book Synopsis Integration of Zero-Valent Metals and Chemical Oxidation for the Destruction of 2,4,6-Trinitrotoluene Within Aqueous Matrices by :

Download or read book Integration of Zero-Valent Metals and Chemical Oxidation for the Destruction of 2,4,6-Trinitrotoluene Within Aqueous Matrices written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Defense (DoD) has numerous sites that contain groundwater contaminated with 2,4,6-trinitrotoluene (TNT). The currently applied technologies for treating TNT contaminated waters are carbon adsorption and chemical oxidation. Carbon adsorption is a non-destructive technology, which could create future liability issues and is inefficient at relatively low TNT concentrations. On the other hand, application of chemical oxidation for the treatment of TNT contaminated water generates trinitrobenzene (TNB), a by-product of the incomplete oxidation of TNT. TNB is regulated as strictly as TNT. Additionally, over 70% of the reactor required treatment time for meeting target levels is due solely for TNB removal. This study evaluated the potential integration of zero-valent metallic species and advanced oxidation for the treatment of waters contaminated with TNT. The idea was to reduce treatment time, and thus, operational costs, when advanced oxidation is used as a stand-alone treatment technology by reducing TNT prior to oxidation. The use of zero-valent metals as the first treatment step transformed TNT into reduced organic compounds which were easily oxidized. The effectiveness of zinc, iron, nickel, copper, and tin as TNT reducing agents was evaluated. Zinc and iron were selected for further study based on their performance degrading TNT. Then, the reduction mechanism (pathway) and associated by-products of TNT reduction using zinc were examined using a zinc specimen manufactured by Sigma Corporation. Three amines were identified during reduction : 2-amino-4,6-dinitrotoluene, 4-amino-2,6-dinitrotoluene, and 2,4-diamino-toluene. Other intermediates were observed but not identified. Many of these reduction by-products adsorbed strongly onto the metal surface, significantly reducing the rate of TNT degradation during aging experiments. The aging of the metallic species was modeled using a power decay law parameter with the rate expression for TNT degradation.

Integration of Zero-valent Metals and Chemical Oxidation for the Destruction of 2,4,6-trinitrotoluene Within Aqueous Matrices

Author : Rafael Hernandez
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (53 download)

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Book Synopsis Integration of Zero-valent Metals and Chemical Oxidation for the Destruction of 2,4,6-trinitrotoluene Within Aqueous Matrices by : Rafael Hernandez

Download or read book Integration of Zero-valent Metals and Chemical Oxidation for the Destruction of 2,4,6-trinitrotoluene Within Aqueous Matrices written by Rafael Hernandez and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Defense (DoD) has numerous sites that contain groundwater contaminated with 2,4,6-trinitrotoluene (TNT). The currently applied technologies for treating TNT contaminated waters are carbon adsorption and chemical oxidation. Carbon adsorption is a non-destructive technology, which could create future liability issues and is inefficient at relatively low TNT concentrations. On the other hand, application of chemical oxidation for the treatment of TNT contaminated water generates trinitrobenzene (TNB), a by-product of the incomplete oxidation of TNT. TNB is regulated as strictly as TNT. Additionally, over 70% of the reactor required treatment time for meeting target levels is due solely for TNB removal. This study evaluated the potential integration of zero-valent metallic species and advanced oxidation for the treatment of waters contaminated with TNT. The idea was to reduce treatment time, and thus, operational costs, when advanced oxidation is used as a stand-alone treatment technology by reducing TNT prior to oxidation. The use of zero-valent metals as the first treatment step transformed TNT into reduced organic compounds which were easily oxidized. The effectiveness of zinc, iron, nickel, copper, and tin as TNT reducing agents was evaluated. Zinc and iron were selected for further study based on their performance degrading TNT. Then, the reduction mechanism (pathway) and associated by-products of TNT reduction using zinc were examined using a zinc specimen manufactured by Sigma Corporation. Three amines were identified during reduction : 2-amino-4,6-dinitrotoluene, 4-amino-2,6-dinitrotoluene, and 2,4-diamino-toluene. Other intermediates were observed but not identified. Many of these reduction by-products adsorbed strongly onto the metal surface, significantly reducing the rate of TNT degradation during aging experiments. The aging of the metallic species was modeled using a power decay law parameter with the rate expression for TNT degradation. Corrosion promoters such as KCl addition, ozonation, and peroxone were evaluated as alternatives to reactivate zinc and iron to achieve steady TNT degradation. The addition of KCl performed significantly better than ozonation and peroxone. Furthermore, addition of KCl during the reduction step using iron or zinc generated organics that were successfully mineralized by ozonation or peroxone.

A survey

Author : Michael R. Blank
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (245 download)

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Book Synopsis A survey by : Michael R. Blank

Download or read book A survey written by Michael R. Blank and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Groundwater Geochemistry

Author : Sughosh Madhav
Publisher : John Wiley & Sons
ISBN 13 : 1119709709
Total Pages : 448 pages
Book Rating : 4.1/5 (197 download)

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Book Synopsis Groundwater Geochemistry by : Sughosh Madhav

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.

Destruction of Aqueous Trihalomethanes in High-surface Area Zero-valent Cobalt Bed Reactors

Author : Samaresh Kumar Singh
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (381 download)

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Book Synopsis Destruction of Aqueous Trihalomethanes in High-surface Area Zero-valent Cobalt Bed Reactors by : Samaresh Kumar Singh

Download or read book Destruction of Aqueous Trihalomethanes in High-surface Area Zero-valent Cobalt Bed Reactors written by Samaresh Kumar Singh and published by . This book was released on 1997 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Chemical Oxidation Applications for Industrial Wastewaters

Author : Olcay Tunay
Publisher : IWA Publishing
ISBN 13 : 1843393077
Total Pages : 361 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Chemical Oxidation Applications for Industrial Wastewaters by : Olcay Tunay

Download or read book Chemical Oxidation Applications for Industrial Wastewaters written by Olcay Tunay and published by IWA Publishing. This book was released on 2010-10-12 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the most recent scientific and technological developments (state-of-the-art) in the field of chemical oxidation processes applicable for the efficient treatment of biologically-difficult-to-degrade, toxic and/or recalcitrant effluents originating from different manufacturing processes. It is a comprehensive review of process and pollution profiles as well as conventional, advanced and emerging treatment processes & technologies developed for the most relevant and pollution (wet processing)-intensive industrial sectors. It addresses chemical/photochemical oxidative treatment processes, case-specific treatability problems of major industrial sectors, emerging (novel) as well as pilot/full-scale applications, process integration, treatment system design & sizing criteria (figure-of-merits), cost evaluation and success stories in the application of chemical oxidative treatment processes. Chemical Oxidation Applications for Industrial Wastewaters is an essential reference for lecturers, researchers, industrial and environmental engineers and practitioners working in the field of environmental science and engineering. Visit the IWA WaterWiki to read and share material related to this title: http://www.iwawaterwiki.org/xwiki/bin/view/Articles/CHEMICALOXIDATIONAPPLICATIONSFORINDUSTRIALWASTEWATERS Authors: Professor Olcay Tünay, Professor Isik Kabdasli, Associate Professor Idil Arslan-Alaton and Assistant Professor Tugba Ölmez-Hanci, Environmental Engineering Department, Istanbul Technical University, Turkey.

Contaminants in the Subsurface

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 030909447X
Total Pages : 371 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Contaminants in the Subsurface by : National Research Council

Download or read book Contaminants in the Subsurface written by National Research Council and published by National Academies Press. This book was released on 2005-04-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.

Arsenic Treatment Technologies for Soil, Waste, and Water

Author :
Publisher : DIANE Publishing
ISBN 13 : 1428900209
Total Pages : 132 pages
Book Rating : 4.4/5 (289 download)

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Book Synopsis Arsenic Treatment Technologies for Soil, Waste, and Water by :

Download or read book Arsenic Treatment Technologies for Soil, Waste, and Water written by and published by DIANE Publishing. This book was released on 2002 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electro-Fenton Process

Author : Minghua Zhou
Publisher : Springer
ISBN 13 : 9811064067
Total Pages : 437 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Electro-Fenton Process by : Minghua Zhou

Download or read book Electro-Fenton Process written by Minghua Zhou and published by Springer. This book was released on 2017-11-25 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the theoretical fundamentals and potential applications of the original electro-Fenton (EF) process and its most innovative and promising versions, all of which are classified as electrochemical advanced oxidation processes. It consists of 15 chapters that review the latest advances and trends, material selection, reaction and reactor modeling and EF scale-up. It particularly focuses on the applications of EF process in the treatment of toxic and persistent organic pollutants in water and soil, showing highly efficient removal for both lab-scale and pre-pilot setups. Indeed, the EF technology is now mature enough to be brought to market, and this collection of contributions from leading experts in the field constitutes a timely milestone for scientists and engineers.

Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309278139
Total Pages : 423 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites by : National Research Council

Download or read book Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites written by National Research Council and published by National Academies Press. This book was released on 2013-02-27 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Across the United States, thousands of hazardous waste sites are contaminated with chemicals that prevent the underlying groundwater from meeting drinking water standards. These include Superfund sites and other facilities that handle and dispose of hazardous waste, active and inactive dry cleaners, and leaking underground storage tanks; many are at federal facilities such as military installations. While many sites have been closed over the past 30 years through cleanup programs run by the U.S. Department of Defense, the U.S. EPA, and other state and federal agencies, the remaining caseload is much more difficult to address because the nature of the contamination and subsurface conditions make it difficult to achieve drinking water standards in the affected groundwater. Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites estimates that at least 126,000 sites across the U.S. still have contaminated groundwater, and their closure is expected to cost at least $110 billion to $127 billion. About 10 percent of these sites are considered "complex," meaning restoration is unlikely to be achieved in the next 50 to 100 years due to technological limitations. At sites where contaminant concentrations have plateaued at levels above cleanup goals despite active efforts, the report recommends evaluating whether the sites should transition to long-term management, where risks would be monitored and harmful exposures prevented, but at reduced costs.

Biodegradation of Nitroaromatic Compounds and Explosives

Author : Jim C. Spain
Publisher : CRC Press
ISBN 13 : 1420032674
Total Pages : 451 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Biodegradation of Nitroaromatic Compounds and Explosives by : Jim C. Spain

Download or read book Biodegradation of Nitroaromatic Compounds and Explosives written by Jim C. Spain and published by CRC Press. This book was released on 2000-06-14 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filled with practical applications and research, Biodegradation of Nitroaromatic Compounds and Explosives presents an international perspective on environmental contamination from explosives. It covers biodegradation strategies for DNT and a wide variety of other nitroaromatic compounds of environmental significance and makes the information access

Biodegradation of Nitroaromatic Compounds

Author : Jim C. Spain
Publisher : Springer Science & Business Media
ISBN 13 : 1475794479
Total Pages : 234 pages
Book Rating : 4.4/5 (757 download)

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Book Synopsis Biodegradation of Nitroaromatic Compounds by : Jim C. Spain

Download or read book Biodegradation of Nitroaromatic Compounds written by Jim C. Spain and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past five years increased awareness of environmental contamination by nitroaromatic compounds has led to a dramatic increase in research on their biodegradation. The resulting discoveries have markedly extended our understanding of degradation mecha nisms and pathways in bacteria and fungi. Futhermore, this new basic knowledge promises the development of field applications of biodegradation systems for nitroaromatic com pounds. In May of 1994, an International Symposium on the Biodegradation of Nitro aromatic Compounds was held in Las Vegas, Nevada. This symposium brought together the scientists at the frontiers of research into the biodegradation of nitro aromatic compounds. The invited speakers were asked to review their area of expertise and write a critical, comprehensive synthesis of their work and related work by others. This book is the result of their efforts. The emphasis of the reviews is on basic research in biodegradation and biotransfor mation. Therefore, the reactions of nitroaromatic compounds in plants, animals, bacteria, fungi, soil, and even nonbiological systems are considered. The goal of the work is to provide the reader with an appreciation of the tremendous range of possibilities for metabolism of aromatic nitro compounds and the experimental approaches used to understand them. This volume should be of interest to biochemists, microbiologists, engineers, toxicologists, and anyone interested in the behavior of synthetic chemicals in the environment or in living systems. Furthermore, a variety of commercial applications can be envisioned for some of the reactions described here.

Treatment of Micropollutants in Water and Wastewater

Author : Jurate Virkutyte
Publisher : IWA Publishing
ISBN 13 : 1843393166
Total Pages : 505 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Treatment of Micropollutants in Water and Wastewater by : Jurate Virkutyte

Download or read book Treatment of Micropollutants in Water and Wastewater written by Jurate Virkutyte and published by IWA Publishing. This book was released on 2010-08-14 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few years there has been a growing concern over the increasing concentration of micropollutants originating from a great variety of sources including pharmaceutical, chemical engineering and personal care product industries in rivers, lakes, soil and groundwater. As most of the micropollutants are polar and persistent compounds, they are only partially or not at all removed from wastewater and thus can enter the environment posing a great risk to the biota. It is hypothesized that wastewater is one of the most important point sources for micropollutants. Treatment of Micropollutants in Water and Wastewater gives a comprehensive overview of modern analytical methods and will summarize novel single and hybrid methods to remove continuously emerging contaminants - micropollutants from the aqueous phase. New trends (e.g. sensor technology, nanotechnology and hybrid treatment technologies) are described in detail. The book is very timely because the new techniques are still in the development phase and have to be realized not only in the laboratory but also on a larger scale. The content of the book is divided into chapters that present current descriptive and analytical methods that are available to detect and measure micropollutants together with detailed information on various chemical, biological and physicochemical methods that have evolved over the last few decades. Treatment of Micropollutants in Water and Wastewater will also enable readers to make well informed choices through providing an understanding of why and how micropollutants must be removed from water sources, and what are the most appropriate and available techniques for providing a cost and technologically effective and sustainable solutions for reaching the goal of micropollutant-free water and wastewater. The book will be suitable for water and wastewater professionals as well for students and researchers in civil engineering, environmental engineering and process engineering fields.

Toxicity of Nitroaromatic Compounds

Author : Douglas E. Rickert
Publisher : CRC Press
ISBN 13 : 9780891163046
Total Pages : 314 pages
Book Rating : 4.1/5 (63 download)

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Book Synopsis Toxicity of Nitroaromatic Compounds by : Douglas E. Rickert

Download or read book Toxicity of Nitroaromatic Compounds written by Douglas E. Rickert and published by CRC Press. This book was released on 1985-01-01 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Chemistry of Advanced Environmental Purification Processes of Water

Author : Erik Sogaard
Publisher : Newnes
ISBN 13 : 0080932401
Total Pages : 359 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Chemistry of Advanced Environmental Purification Processes of Water by : Erik Sogaard

Download or read book Chemistry of Advanced Environmental Purification Processes of Water written by Erik Sogaard and published by Newnes. This book was released on 2014-04-11 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry of Advanced Environmental Purification Processes of Water covers the fundamentals behind a broad spectrum of advanced purification processes for various types of water, showing numerous applications through worked examples. Purification processes for groundwater, soil water, reusable water, and raw water are examined where they are in use full-scale, as a pilot approach, or in the laboratory. This book also describes the production of ceramic particles (nanochemistry) and materials for the creation of filtration systems and catalysts that are involved. - Uses chemistry fundamentals to explain the mechanisms behind the various purification processes - Explains in detail process equipment and technical applications - Describes the production of ceramic particles and other new materials applicable to filtration systems - Includes worked examples

Handbook of Surface Plasmon Resonance

Author : Richard B. M. Schasfoort
Publisher : Royal Society of Chemistry
ISBN 13 : 1782627308
Total Pages : 555 pages
Book Rating : 4.7/5 (826 download)

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Book Synopsis Handbook of Surface Plasmon Resonance by : Richard B. M. Schasfoort

Download or read book Handbook of Surface Plasmon Resonance written by Richard B. M. Schasfoort and published by Royal Society of Chemistry. This book was released on 2017-05-30 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface plasmon resonance (SPR) plays a dominant role in real-time interaction sensing of biomolecular binding events, this book provides a total system description including optics, fluidics and sensor surfaces for a wide researcher audience.

Desalination

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309119235
Total Pages : 313 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Desalination by : National Research Council

Download or read book Desalination written by National Research Council and published by National Academies Press. This book was released on 2008-09-14 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an exponential increase in desalination capacity both globally and nationally since 1960, fueled in part by growing concern for local water scarcity and made possible to a great extent by a major federal investment for desalination research and development. Traditional sources of supply are increasingly expensive, unavailable, or controversial, but desalination technology offers the potential to substantially reduce water scarcity by converting the almost inexhaustible supply of seawater and the apparently vast quantities of brackish groundwater into new sources of freshwater. Desalination assesses the state of the art in relevant desalination technologies, and factors such as cost and implementation challenges. It also describes reasonable long-term goals for advancing desalination technology, posits recommendations for action and research, estimates the funding necessary to support the proposed research agenda, and identifies appropriate roles for governmental and nongovernmental entities.