Download or read book In Situ Treatment of Soil and Groundwater Contaminated with Chromium written by National Risk Management Research Laboratory (U.S.) and published by . This book was released on 2000 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In Situ Treatment of Soil and Groundwater Contaminated with Chromium written by and published by . This book was released on 2002-07-01 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contamination of soil & groundwater by chromium is a significant problem in the U.S. The poor performance of pump-&-treat systems in the mid-1980s provided the driving force for research of subsurface processes in order to develop more efficient groundwater remediation strategies & techniques. As a result, new information & treatment approaches have been developed for chromium-contaminated soil & groundwater treatment. This document brings together the most current information pertaining to the science of chromium contamination & the treatment & control of sites with groundwater &/or soil contaminated with it. List of acronyms, abbreviations, & symbols. Charts & tables.

Download or read book IN SITU TREATMENT OF SOIL AND GROUNDWATER CONTAMINATED WITH CHROMIUM TECHNICAL RESOURCE GUIDE U S ENVIRONMENTAL PROTECTION AGENCY written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Developments for in Situ Treatment of Metal Contaminated Soils written by and published by DIANE Publishing. This book was released on 1997 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chromium in Soil Perspectives in Chemistry Health and Environmental Regulation written by Paul T. Kostecki and published by CRC Press. This book was released on 1998-01-08 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of understanding complex toxicological and chemical properties of hexavalent and trivalent chromium has increased rapidly over the last few years as state and federal regulators reevaluate environmental standards. The risk management of chromium-contaminated soils continues to be a very dynamic process that presents interesting challenges. Chromium in Soil discusses the challenges faced by those investigating and remediating chromium-impacted soils and groundwater. The chapters address numerous ground-breaking developments in various fields of environmental chromium research, including toxicity, chemistry, environmental fate and transport, remediation technology, and health-based cleanup standards.

Download or read book Laboratory Evaluation of the in Situ Chemical Treatment Approach to Soil and Groundwater Remediation written by and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of initial proof of principle laboratory testing activities successfully demonstrated the viability of the in situ chemical treatment approach for remediation of soil and groundwater contaminated by hexavalent chromium. Testing activities currently in progress further indicate that soils contaminated with hexavalent chromium and uranium at concentrations of several hundred parts per million can be successfully treated with 100 ppM hydrogen sulfide gas mixtures. Greater than 90% immobilization of hexavalent chromium and 50% immobilization of uranium have been achieved in these tests after a treatment period of one day. Activities associated with further development and implementation of the in situ chemical treatment approach include conducting additional bench scale tests with contaminated geomedia, and undertaking scale-up laboratory tests and a field demonstration. This report discusses the testing and further development of this process.

Download or read book Chromium Treatment from Contaminated Soil and Groundwater written by V. Kumar and published by . This book was released on 2023-03-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the treatability study of chromium and other heavy metals from contaminated soil and groundwater. The author provides an in-depth analysis of the various treatment methods and their effectiveness in removing chromium and other heavy metals from contaminated sites. The book discusses the sources of chromium contamination in soil and groundwater, the effects of chromium exposure on human health and the environment, and the regulatory guidelines for chromium levels in soil and water. The author also examines the different treatment methods available for chromium and heavy metal removal, including physical, chemical, and biological methods. The book focuses on the use of advanced oxidation processes (AOPs) for the treatment of chromium-contaminated soil and groundwater. The author explores the application of different AOPs, including photocatalysis, Fenton's reagent, and ozonation, and discusses their advantages and limitations. The book also covers the use of adsorption, ion exchange, and membrane filtration technologies for the removal of heavy metals from contaminated soil and groundwater. The author provides case studies and real-world examples to illustrate the effectiveness of different treatment methods and their applications in the field of environmental remediation. Overall, "Chromium Treatment from Contaminated Soil and Groundwater" is a valuable resource for researchers, scientists, and professionals working in the field of environmental remediation and pollution control.

Download or read book In Situ Immobilization of Heavy Metal Contaminated Soils written by G. Czupyrna and published by William Andrew. This book was released on 1989-12-31 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many waste solutions and sludges contaminated with heavy metals are generated during aircraft maintenance operations at various Air Force Air Logistics Centers. The disposal of these waste streams by previously acceptable means has led to problems with the contamination of both soil and groundwater. Available technologies for treating contaminated soils are expensive. In situ immobilization of heavy metals is a cost-effective treatment alternative to alleviate the environmental and health hazards associated with contaminated soils. The objective of the program was the laboratory evaluation of various treatment chemicals for the in situ immobilization of hexavalent chromium, cadmium, nickel, copper and zinc in soils from Air Force facilities in the United States.

Download or read book Remediation of Chromium Contaminated Soil Theory and Practice written by Weichun Yang and published by Springer Nature. This book was released on 2023-10-03 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: In accordance with the global needs of heavy metal-contaminated site remediation, this book systematically introduces the latest theories and technical achievements of microbial and chemical treatment for the chromium pollution in the chromium slag and chromium-contaminated soil, combined with the author's research achievements over the decades. The book focuses on the biological and chemical behavior of chromium in soil, microbial, and chemical remediation for the chromium-contaminated soil and the cases of chromium-contaminated site remediation project. This book is used by the scientific researchers and engineering technicians engaged in chromium chemical industry and environmental protection. It is also used as a textbook and reference book for graduate students in environmental science and engineering, soil science, chemistry and chemical engineering, and other related fields.

Download or read book Remediation and Reuse of Chromium Contaminated Soils Through Cold Top Ex site Vitrification written by Wiwat Kamolpornwijit and published by . This book was released on 1996 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 150 sites in Hudson County, New Jersey are identified as chromium contaminated sites. Hexavalent chromium, highly soluble in water, is considered as an environmental and health hazard, classified as a group A human carcinogen. In this research, the feasibility was performed to study the possibility of remediation of chromium contaminated soil by ex-situ vitrification and to evaluate reuse potential of vitrified products as highway construction aggregate. A series of physical and chemical analysis was conducted on nine soil samples collected from different chromium contaminated sites. Results were analyzed for their compatibility for vitrification. Sand and carbon were added to enhance vitrification process. Vitrification was performed and the vitrified products were subjected to further chemical and physical tests. TCLP chromium concentration results verified a successful remediation. The vitrified product properties complied with the New Jersey Department of Transportation standards, designating high reuse potential.

Download or read book An In situ Permeable Reactive Barrier for the Treatment of Hexavalent Chromium and Trichloroethylene in Ground Water Performance monitoring written by and published by . This book was released on 1999 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remediation Engineering of Contaminated Soils written by Donald L. Wise and published by CRC Press. This book was released on 2000-07-25 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Offers thorough coverage of the remediation of soils contaminated by hazardous wastes, including materials, analytical techniques, cleanup design and methodology, characterization of geomedia, monitoring of contaminants in the subsurface, and waste containment. Cites specific case studies in hydrocarbon remediation that offer a concise overview of possible technological approaches."

Download or read book Technology Alternatives for the Remediation of Soils Contaminated with As Cd Cr Hg and Pb written by and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory and Field Evaluation of the Gas Treatment Approach for Insitu Remediation of Chromate contaminated Soils written by and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory scale soil treatment tests have been conducted as part of an effort to develop and implement an in situ chemical treatment approach to the remediation of chromate-contaminated soils through the use of reactive gases. These tests involved three different soil samples that were contaminated with Cr(VI) at the 200 ppM level. Treatment of the contaminated soils was performed by passing 100 ppM and 2000 ppM concentrations of hydrogen sulfide in nitrogen through soil columns until a S:Cr mole ratio of 10:1 was achieved. The treated soils were then leached with groundwater or deionized water and analyzed to assess the extent of chromium immobilization. Test results indicate>90% immobilization of chromium and demonstrate that the treatment process is irreversible. Ongoing developmental efforts are being directed towards the demonstration and evaluation of the gas treatment approach in a field test at a chromate-contaminated site. Major planned activities associated with this demonstration include laboratory testing of waste site soil samples, design of the treatment system and injection/extraction well network, geotechnical and geochemical characterization of the test site, and identification and resolution of regulatory and safety requirements.

Download or read book A Steady state Model for Hexavalent Chromium Reduction in Simulated Biological Reactive Barrier written by Phalazane Johanna Mtimunye and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological remediation of Cr(VI) contaminated soil and groundwater is an emerging field. In this study, the in situ bioremediation technology for treating Cr(VI) contaminated groundwater aquifers was evaluated using a laboratory microcosm system. The study was conducted using columns with five equally spaced intermediate sampling ports along the length to facilitate finite difference modelling of the Cr(VI) concentration profile within the column. Cr(VI) concentration was continuously measured in the influent, in five equally spaced intermediate ports within the column and in the effluent port. The change or the shift in microbial community within the inoculated column was also monitored due to exposure to toxic conditions after seven weeks of operation using the 16S rRNA genotype fingerprinting method. The effect of introducing a natural carbon source (sawdust) in inoculated columns in comparison with the performance of sterile controls under various loading conditions was also evaluated. Near complete Cr(VI) removal was achieved in an inoculated carbon source reactor, whereas only 69.5% of Cr(VI) removal was achieved in an inoculated column without an added carbon source after 4 days of operation at 20 mg/L. In a sterile control reactor less than 2% of Cr(VI) was removed after 4 days of operation at 20 mg/L. Experimental cores demonstrated a successful Cr(VI) reduction process in the simulated microbial barrier system that was evaluated internally. The model that simulates Cr(VI) removal and transport in the subsoil environment was developed. The Cr(VI) mass balance model across the reactor that accounts for the flow characteristics and biological removal mechanism successfully captured the trends of Cr(VI) response profiles under quasi-steady state conditions for different loading conditions. This study demonstrate the potential of applying effective Cr(VI) reducers in the reactive barrier systems to contain or attenuate the spread of Cr(VI) contaminant in groundwater aquifer systems. The finite difference model developed in this study to evaluate the behaviour of Cr(VI) in the reactor could contribute towards improved designs of future in situ bioremediation systems that can be implemented for remediation of Cr(VI) on site.

Download or read book Monitored Natural Attenuation of Inorganic Contaminants in Ground Water written by and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.

Download or read book Chromium Contamination written by R. J. F. Bewley and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a series of field and laboratory-scale trials for the remediation of chromium contamination. These relate to several sites in south-east Glasgow. The trials include chemical, physico-chemical and microbiological techniques. The report outlines the objectives and methodologies for each of these trials, discusses the results obtained, and evaluates their overall effectiveness in the treatment of soil, surface water and groundwater contamination by chromium.