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Author : J. Gotpagar
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (349 download)
Download or read book Reductive Dehalogenation of Trichloroethylene Using Zero-Valent Iron written by J. Gotpagar and published by . This book was released on 1996 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jayant K. Gotpagar
Publisher :
ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.:/5 (49 download)
Download or read book Reductive Dehalogenation of Trichloroethylene by Zero-valent Iron and Multiphase Transport Model written by Jayant K. Gotpagar and published by . This book was released on 1998 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Angela Dee Follett
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (319 download)
Download or read book Explorations Into the Mechanism and Kinetics of the Reduction of Trichloroethylene Using Model Complexes of Cobalamin and Zero-valent Iron written by Angela Dee Follett and published by . This book was released on 2006 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Amanda S. Mutziger
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.3/5 (121 download)
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:
Author : Gregory V. Lowry
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (89 download)
Download or read book Kinetics of Enhanced Dechlorination of Trichloroethylene Using Zero-valent Iron written by Gregory V. Lowry and published by . This book was released on 1995 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kaili Qian
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.3/5 (121 download)
Download or read book Trichloroethylene Degradation by Mixed Culture and Zero-valent Iron written by Kaili Qian and published by . This book was released on 2010 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Neil A. Stewart
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (119 download)
Download or read book Reaction Rates for the Dehalogenation of Trichloroethylene Using Various Types of Zero-valent Iron written by Neil A. Stewart and published by . This book was released on 2005 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The data obtained produced linear first order rate plots from which dehalogenation rate constants were obtained. The rate constants were normalized by iron mass, solution volume, and surface area. The pretreatment techniques employed in this study, including ultrasonication and acid washing, demonstrated a beneficial effect by removing oxide precipitates from the iron surface, thus increasing the reactivity of the iron. Mass loading studies revealed how physical factors, associated with the experimental setup, could influence reaction rates. Surface area studies confirmed that the smaller iron particles, such as the nanoscale iron, have a greater surface area per unit mass. The large mass and volume normalized rate constant, k[subscript MV], obtained for the nanoscale iron was a result of this high surface area. However, the calculated surface area normalized rate constant, k[subscript SA], for the nanoscale iron was significantly lower than those for the granular iron samples tested. It was concluded that differences in surface area normalized rate constants, between different iron particle types, could be attributed to inherent characteristics of the iron, such as composition and crystal structure.
Author : Mengwen Zhang
Publisher :
ISBN 13 : 9781321239010
Total Pages : 76 pages
Book Rating : 4.2/5 (39 download)
Download or read book Rates of Trichloroethylene Reduction in Passivated Zero-valent Iron Upon Application of Low-level Direct Current written by Mengwen Zhang and published by . This book was released on 2014 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permeable reactive barriers (PRB) containing zero-valent iron (ZVI) have been used for the in situ remediation of groundwater contaminated with trichloroethylene (TCE) for almost two decades; however, ZVI is susceptible to passivation over time, which greatly reduces its treatment efficiency. Several recent studies have suggested that electrically-induced reduction (EIR), the application of low-level direct current, may restore the reactivity of passivated ZVI in situ. In this study, a continuous-flow column reactor was fabricated to treat TCE-contaminated groundwater and assess the effects of low-voltage direct current (0-12 V) on abiotic TCE reduction. In experiments with partially passivated ZVI, application of current increased the rate and the extent of abiotic TCE reduction; both were correlated with voltage. Based on calculated reaction rate coefficients, TCE reduction in passivated ZVI is a first-order reaction. While several mechanisms contribute to the abiotic reduction of TCE in passivated ZVI, they are difficult to isolate experimentally.
Author : Ruchi Bipinbhai Shah
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (16 download)
Download or read book Zero Valent Iron Nanoparticles written by Ruchi Bipinbhai Shah and published by . This book was released on 2008 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matthew A. Tarr
Publisher : CRC Press
ISBN 13 : 9780203912553
Total Pages : 506 pages
Book Rating : 4.9/5 (125 download)
Download or read book Chemical Degradation Methods for Wastes and Pollutants written by Matthew A. Tarr and published by CRC Press. This book was released on 2003-08-08 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Degradation Methods for Wastes and Pollutants focuses on established and emerging chemical procedures for the management of pollutants in industrial wastewater and the environment. This reference offers an in-depth explanation of the degradation process, mechanisms, and control factors affecting each method, as well as issues crucial to th
Author : Tanapon Phenrat
Publisher : Springer
ISBN 13 : 3319953400
Total Pages : 611 pages
Book Rating : 4.3/5 (199 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Processes Affecting Reductive Dechlorination of Chlorinated Solvents by Zero-Valent Iron written by and published by . This book was released on 1993 with total page 0 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.
Author : Zhaohui Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (696 download)
Download or read book Admicelle-catalyzed Reductive Dechlorination of Perchloroethylene (PCE) by Zero Valent Iron written by Zhaohui Li and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Warren Lewter
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (546 download)
Download or read book Column Studies to Determine the Effects of PH on the Dechlorination of Trichloroethene by Zero-valent Iron written by Christopher Warren Lewter and published by . This book was released on 2002 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performs column studies to determine the effects of pH and EDTA (ethylenediaminetetraacetic acid) concentration on the degradation of TCE (trichloroethene) by ZVI (zero-valent iron). The aim of the study is to provide additional kinetic data for more efficient methods of using ZVI for the remediation of TCE-contaminated groundwaters.
Author : Isaac Amponsah
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (214 download)
Download or read book Electrochemical Reduction of Trichloroethylene Using Zero-valent Iron as Cathode Material written by Isaac Amponsah and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluates the effects of external cathodic current on the trichloroethylene (TCE) degradation rate by zero-value iron (ZVI). Sets up a bench scale test and a reactor where electrolytic reduction can take place.
Author : Signe Martha Ulsamer
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (841 download)
Download or read book A Model to Characterize the Kinetics of Dechlorination of Tetrachloroethylene and Trichloroethylene By a Zero Valent Iron Permeable Reactive Barrier written by Signe Martha Ulsamer and published by . This book was released on 2011 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A one dimensional, multiple reaction pathway model of the dechlorination reactions of trichloroethylene (TCE) and tetrachloroethylene (PCE) as these species pass through a zero valent iron permeable reactive barrier (PRB) was produced. Three different types of rate equations were tested; first order, surface controlled with interspecies competition, and surface controlled with inter and intra species competition. The first order rate equations predicted the most accurate results when compared to actual data from permeable reactive barriers. Sensitivity analysis shows that the most important variable in determining TCE concentration in the barrier is the first order rate constant for the degradation of TCE. The velocity of the water through the barrier is the second most important variable determining TCE concentration. For PCE the concentration in the barrier is most sensitive to the velocity of the water and to the first order degradation rate constant for the PCE to dichloroacetylene reaction. Overall, zero valent iron barriers are more effective for the treatment of TCE than PCE.
Author : Jan Filip
Publisher : Springer Nature
ISBN 13 : 303029840X
Total Pages : 656 pages
Book Rating : 4.0/5 (32 download)
Download or read book Advanced Nano-Bio Technologies for Water and Soil Treatment written by Jan Filip and published by Springer Nature. This book was released on 2020-01-17 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are proposing this comprehensive volume aimed at bridging and bonding of the theory and practical experiences for the elimination of a broad range of pollutants from various types of water and soil utilizing innovative nanotechnologies, biotechnologies and their possible combinations. Nowadays, a broad range of contaminants are emerging from the industry (and also representing old ecological burdens). Accidents and improper wastewater treatment requires a fast, efficient and cost-effective approach. Therefore, several innovative technologies of water and soil treatments have been invented and suggested in a number of published papers. Out of these, some nanotechnologies and biotechnologies (and possibly also their mutual combinations) turned out to be promising for practical utilization – i.e., based on both extensive laboratory testing and pilot-scale verification. With respect to the diverse character of targeted pollutants, the key technologies covered in this book will include oxidation, reduction, sorption and/or biological degradation. In relation to innovative technologies and new emerging pollutants mentioned in this proposed book, an important part will also cover the ecotoxicity of selected pollutants and novel nanomaterials used for remediation. Thus, this work will consist of 8 sections/chapters with a technical appendix as an important part of the book, where some technical details and standardized protocols will be clearly presented for their possible implementation at different contaminated sites. Although many previously published papers and books (or book chapters) are devoted to some aspects of nano-/biotechnologies, here we will bring a first complete and comprehensive treatise on the latest progress in innovative technologies with a clear demonstration of the applicability of particular methods based on results of the authors from pilot tests (i.e., based on the data collected within several applied projects, mainly national project “Environmentally friendly nanotechnologies and biotechnologies in water and soil treatment” of the Technology Agency of the Czech Republic, and 7FP project NANOREM: “Taking Nanotechnological Remediation Processes from Lab Scale to End User Applications for the Restoration of a Clean Environment”). This multidisciplinary book will be suitable for a broad audience including environmental scientists, practitioners, policymakers and toxicologists (and of course graduate students of diverse fields – material science, chemistry, biology, geology, hydrogeology, engineering etc.).
