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Degradation Of Trichloroethylene Tce And Polychlorinated Biphenyls Pcbs By Fe And Fe Pd Bimetals In The Presence Of Surfactants And Cosolvents
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Book Synopsis Degradation of Trichloroethylene (TCE) and Polychlorinated Biphenyls (PCBs) by Fe and Fe-Pd Bimetals in the Presence of Surfactants and Cosolvents by :
Download or read book Degradation of Trichloroethylene (TCE) and Polychlorinated Biphenyls (PCBs) by Fe and Fe-Pd Bimetals in the Presence of Surfactants and Cosolvents written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surfactants and cosolvents are being used to enhance the removal of dense non-aqueous phase liquids (DNAPL) such as trichloroethylene (TCE) and polychlorinated biphenyls (PCBS) from contaminated soils. However, the waste surfactant solution containing TCE and PCBs must be treated before it can be disposed. This study evaluated the use of zero-valence iron and palladized iron fillings on the dechlorination of TCE and a PCB congener in a dihexylsulfosuccinate surfactant solution. Batch experimental results indicated that TCE can be rapidly degraded by palladized iron filings with a half-life of 27.4 min. PCB was degraded at a slower rate than TCE with a half-life ranging from 100 min to 500 min as the concentration of surfactant increased. In column flow-through experiments, both TCE and PCBs degrade at an enhanced rate with a half-life about 1.5 and 6 min because of an increased solid to solution ratio in the column than in the batch experiments. Results of this work suggest that Fe-Pd filings may be potentially applicable for ex-situ treatment of TCE and PCBs in the surfactant solutions that are generated during surfactant washing of the contaminated soils.
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:
Book Synopsis The Office of Environmental Management Technical Reports: A Bibliography by :
Download or read book The Office of Environmental Management Technical Reports: A Bibliography written by and published by DIANE Publishing. This book was released on 2001 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Environmental Management's (EM) technical reports bibliography is an annual publication that contains information on scientific and technical reports sponsored by the Office of Environmental Management added to the Energy Science and Technology Database from July 1, 1994 through June 30, 1995. This information is divided into the following categories: Focus Areas, Cross-Cutting Programs, and Support Programs. In addition, a category for general information is included. EM's Office of Science and Technology sponsors this bibliography.
Book Synopsis Interaction PrInteraction Profile for : Stontium, Cobalt, Cesium, Trichloroethylene, and Polychlorinated Biuphenys by : Department of Health & Human Services
Download or read book Interaction PrInteraction Profile for : Stontium, Cobalt, Cesium, Trichloroethylene, and Polychlorinated Biuphenys written by Department of Health & Human Services and published by . This book was released on 2001 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Degradation of Trichloroethylene Using Iron, Bimetals and Trimetals by : Wanchun Yuan
Download or read book Degradation of Trichloroethylene Using Iron, Bimetals and Trimetals written by Wanchun Yuan and published by . This book was released on 2000 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of non-chlorinated hydrocarbons consisting Of C3 to C6 alkanes and alkenes was also observed. In the presence of various anions, competition between N03− and TCE was observed for zero-valent iron, bimetals and trimetals, especially when the concentration of N03− was higher than 200 mg/L. In the presence Of S042− and PO43−, there appeared to be an increase in TCE degradation rate using Fe/Cu/Ni but no significant effect using Fe/Ni, Fe/Cu and Fe. The presence Of HC03− did not affect the degradation rates of TCE dechlorination with zero-valent, bimetals and trimetals. Except in the 200 mg/L N03− solution, the degradation of TCE in the HC03−, SO42−, PO43−, and N03− was faster in Fe/Cu/Ni followed by Fe/Ni, Fe/Cu, and Fe. This study indicated that plating copper and nickel onto zero-valent iron will enhance TCE degradation rate constants by approximately one to two orders of magnitude.
Book Synopsis Enhanced Degradation of Polychlorinated Biphenyls by Surfactants and a Dioxygenase Enzyme Complex by : Bernard F. Gibbs
Download or read book Enhanced Degradation of Polychlorinated Biphenyls by Surfactants and a Dioxygenase Enzyme Complex written by Bernard F. Gibbs and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a worldwide initiative to remove polychlorinated biphenyls (PCBs) from the environment because of their potential hazard. Animal experiments have shown they can produce liver damage, developmental defects and even cancer. Thirty per cent of the 310,000 tons of PCBs that have been produced globally are now considered as persistent toxicants in the environment. To date, only 4% have been successfully treated. Although a number of technologies are in existence for the treatment of persistent organic pollutants (POPs), they do have several drawbacks including the production of toxic volatiles in incinerators and high cost associated with these procedures. On the other hand, successful bioremediation is relatively inexpensive, as shown for polyaromatic hydrocarbons (PAH) degradation, with the added advantages of being able to be carried out in situ . In this study, preliminary experiments demonstrated that certain surfactants enhance PCB degradation in aqueous solution in the presence of enzymes, in a concentration-dependent manner. These surfactants have not been previously reported as enhancers in PCB degradation. Conditions were optimized before experiments with soil samples were performed. A soil sample (free of PCBs) was spiked with varying amounts of PCBs and internal standards. Samples were mixed at various speeds, temperatures, incubation periods and concentrations of surfactants, before the metabolites were extracted and mass analyzed. An aged PCB-contaminated soil sample was also studied. PCBs extraction recoveries for the spiked samples two hours after exposure to the toxicants were 93% whereas average recovery from the samples extracted after 60 days of toxicant exposure was 67%. Within 2 hours of incubation, 47, 28 and 14% of PCBs were biodegraded from the contaminated sample by the addition of surfactin, rhamnolipids and octyl glucoside respectively, at concentrations above their critical micelle concentrations. If the soil composition and mechanism for removal at a contaminated site are fully understood, in situ biodegradation can be exploited.
Book Synopsis Fate of Polychlorinated Biphenyls (PCBs) in Soil Following Stabilization with Quicklime by : Robert L. Einhaus
Download or read book Fate of Polychlorinated Biphenyls (PCBs) in Soil Following Stabilization with Quicklime written by Robert L. Einhaus and published by . This book was released on 1991 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Degradation of Polychlorinated Biphenyls by : Bernard Gibbs
Download or read book Enhanced Degradation of Polychlorinated Biphenyls written by Bernard Gibbs and published by LAP Lambert Academic Publishing. This book was released on 2011-03 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a worldwide initiative to remove polychlorinated biphenyls (PCBs) from the environment because of their potential hazard. Animal experiments have shown they can produce liver damage, developmental defects and even cancer. Thirty per cent of the 310,000 tons of PCBs that have been produced globally are now considered as persistent toxicants in the environment. To date, only 4% have been successfully treated. Although a number of technologies are in existence for the treatment of persistent organic pollutants (POPs), they do have several drawbacks including the production of toxic volatiles in incinerators and high cost associated with these procedures. On the other hand, successful bioremediation is relatively inexpensive, as shown for polyaromatic hydrocarbons (PAH) degradation, with the added advantages of being able to be carried out in situ. In this study, preliminary experiments demonstrated that certain surfactants enhance PCB degradation in aqueous solution in the presence of enzymes, in a concentration-dependent manner. These surfactants have not been previously reported as enhancers in PCB degradation.
Book Synopsis Occupational Exposure to Polychlorinated Biphenyls (PCBs) by : National Institute for Occupational Safety and Health
Download or read book Occupational Exposure to Polychlorinated Biphenyls (PCBs) written by National Institute for Occupational Safety and Health and published by . This book was released on 1977 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polychlorinated Biphenyls (PCBs) by : Havard J. Prosser
Download or read book Polychlorinated Biphenyls (PCBs) written by Havard J. Prosser and published by . This book was released on 1990 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Soil Remediation and Rehabilitation by : Eric D. van Hullebusch
Download or read book Environmental Soil Remediation and Rehabilitation written by Eric D. van Hullebusch and published by Springer Nature. This book was released on 2020-04-22 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of innovative remediation techniques and strategies for soils contaminated by heavy metals or organic compounds (e.g. petroleum hydrocarbons, NAPLs and chlorinated organic compounds). It discusses various novel chemical remediation approaches (in-situ and ex-situ) used alone and in combination with physical and/or thermal treatment. Further, it addresses the recovery of NAPLs, reuse of leaching solutions, and in-situ chemical reduction and oxidation, and explores the chemical enhancement of physical NAPLs recovery from both practical and theoretical perspectives. Also presenting the state-of-the-art in waste-assisted bioremediation to improve soil quality and the remediation of petroleum hydrocarbons, the book is a valuable resource for students, researchers and R&D professionals in industry engaged in the treatment of contaminated soils.
Book Synopsis Physical and Chemical Processes in the Aquatic Environment by : Erik R. Christensen
Download or read book Physical and Chemical Processes in the Aquatic Environment written by Erik R. Christensen and published by John Wiley & Sons. This book was released on 2014-09-15 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is need in environmental research for a book on fresh waters including rivers and lakes. Compared with other books on the topic, this book has a unique outline in that it follows pollution from sources to impact. Included in the text is the treatment of various tracers, ranging from pathogens to stable isotopes of elements and providing a comprehensive discussion which is lacking in many other books on pollution control of natural waters. Geophysical processes are discussed emphasizing mixing of water, interaction between water and the atmosphere, and sedimentation processes. Important geochemistry processes occurring in natural waters are described as are the processes specific to nutrients, organic pollutants, metals, and pathogens in subsequent chapters. Each of these chapters includes an introduction on the selected groups, followed by the physicochemical properties which are the most relevant to their behavior in natural waters, and the theories and models to describe their speciation, transport and transformation. The book also includes the most up to date information including a discussion on emerging pollutants such as brominated and phosphate flame retardants, perflurochemicals, and pharmaceutical and personal care products. Due to its importance an ecotoxicology chapter has been included featuring molecular biological methods, nanoparticles, and comparison of the basis of biotic ligand model with the Weibull dose-response model. Finally, the last chapter briefly summarizes the regulations on ambient water quality.
Book Synopsis Pollution Prevention by : Paul L. Bishop
Download or read book Pollution Prevention written by Paul L. Bishop and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollution Prevention: Fundamentals and Practice provides a thorough foundation in pollution prevention concepts and methods. It fills an important role in the engineering curriculum by giving engineers in all disciplines the tools to incorporate environmental consequences in decision making in the same way that economic and safety factors are considered. The wealth of background information included makes this an ideal choice for those new to the field as well as for environmental engineering or chemical engineering majors and practitioners. Starting with an introduction to pollution prevention, the author progresses through a review of pollution and its consequences and describes the regulatory framework under which the industry must operate. Later chapters emphasize the sources of industrial pollution and how these can be minimized, the methodology for conducting life-cycle assessments and developing successful pollution prevention plans, and technological means for minimizing the use of water, energy, and reagents in manufacturing. Materials selection, process and product design, and packaging also are addressed. Throughout the text, example problems provide abundant opportunities to apply the concepts learned.
Book Synopsis Advances in Bionanomaterials by : Stefano Piotto
Download or read book Advances in Bionanomaterials written by Stefano Piotto and published by Springer. This book was released on 2017-07-24 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on multidisciplinary research focusing on the analysis, synthesis and design of bionanomaterials. It merges the biophysicists’, the biochemists’ and bioengineers’ perspectives, covering the study of the basic properties of materials and their interaction with biological systems, the development of new devices for medical purposes such as implantable systems, and new algorithms and methods for modeling the mechanical, physical or biological properties of biomaterials. The different chapters, which are based on selected contributions presented at the second edition of BIONAM, held on October 4-7, 2016, in Salerno, Italy, cover both basic and applied research. This includes novel synthetic strategies for nanomaterials, as well as the implementation of bio- and smart materials for pharmacological and medical purposes (e.g. drug delivery, implantable systems), environmental applications, and many others. The book provides a broad audience of academic and professionals with a comprehensive, timely snapshot of the field of biomaterials. Besides offering a set of innovative theories together with the necessary practical tools for their implementation, it also highlights current challenges in the field, thus fostering new discussions and possible future collaborations between groups with different backgrounds.
Book Synopsis Organohalide-Respiring Bacteria by : Lorenz Adrian
Download or read book Organohalide-Respiring Bacteria written by Lorenz Adrian and published by Springer. This book was released on 2016-08-03 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the current state of knowledge concerning bacteria that use halogenated organic compounds as respiratory electron acceptors. The discovery of organohalide-respiring bacteria has expanded the range of electron acceptors used for energy conservation, and serves as a prime example of how scientific discoveries are enabling innovative engineering solutions that have transformed remediation practice. Individual chapters provide in-depth background information on the discovery, isolation, phylogeny, biochemistry, genomic features, and ecology of individual organohalide-respiring genera, including Dehalococcoides, Dehalogenimonas, Dehalobacter, Desulfitobacterium and Sulfurospirillum, as well as organohalide-respiring members of the Deltaproteobacteria. The book introduces readers to the fascinating biology of organohalide-respiring bacteria, offering a valuable resource for students, engineers and practitioners alike.
Book Synopsis Transverse Dispersion in Liquid Flow Through Porous Media by : Eugene Sidney Simpson
Download or read book Transverse Dispersion in Liquid Flow Through Porous Media written by Eugene Sidney Simpson and published by . This book was released on 1962 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pump-and-treat Ground-water Remediation by :
Download or read book Pump-and-treat Ground-water Remediation written by and published by . This book was released on 1996 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
