Sequential Extraction Evaluation Of Heavy Metal Contaminated Soil
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Sequential Extraction Evaluation Of Heavy Metal Contaminated Soil
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Author :
language : en
Publisher:
Release Date : 1995
Sequential Extraction Evaluation Of Heavy Metal Contaminated Soil written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
As a result of industrial and military operations, large amounts of land have become contaminated with heavy metals. A growing public awareness of metal toxicity in soils and water has forced increased treatment and improved remediation techniques. To develop an adequate knowledge base to definitively judge the usefulness of the remediation technology requires some basic research in how the contaminants are bound in the soil. In this study, the classic five-step sequential extractions were performed on heavy-metal-contaminated soil from Aberdeen Proving Ground to determine the speciation of the metal forms. This technique speciates the heavy metal distribution into an easily extractable (exchangeable) form, carbonates, reducible oxides, organically-bound forms, and residual forms. In order to compare the results of these fractionations with the amount of heavy metals extracted by chelating agents, multi-stage extractions with EDTA were also performed. The results were used to determine the feasibility of using soil washing and soil flushing techniques for remediating the Aberdeen metals-contaminated soils.
Evaluation Of The Removal Of Heavy Metals From Contaminated Sediment In Continuous Flow Tests With Selective Sequential Extraction
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Author : B. Dahrazma
language : en
Publisher:
Release Date : 2006
Evaluation Of The Removal Of Heavy Metals From Contaminated Sediment In Continuous Flow Tests With Selective Sequential Extraction written by B. Dahrazma and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Contaminated sediments categories.
Solutions to heavy metal-contaminated sediment require the understanding of the availability of heavy metals, interaction of the contaminants with soil and sediment particles, and metal retention mechanisms, which are complicated phenomena. The objective of this investigation was to study the removal of heavy metals (copper, zinc, and nickel) from the sediments by employing a biosurfactant rhamnolipid in continuous flow tests. Continuous flow of the biosurfactant in a column was applied to evaluate the feasibility of this type of setup since the configuration simulates the process of soil flushing. In the case of heavy metals, the flowing washing agent is believed to reduce the possibility of readsorption of the metals on to the soil and sediment. In addition, since the distribution of heavy meals between soil and solute is the key to evaluating the environmental impact of the metals, to determining the mobility of metals and to recommending reliable removal techniques, selective sequential extraction tests were used to determine the portion of sediment from which the metal was removed. This method is based on extracting metals with solutions of increasing strengths from different fractions of soils or sediments. Exchangeable, carbonate, reducible oxide, and organic fractions responded to washing techniques while residually bound contaminants are not economical or feasible to remove. This information is vital in proposing the most appropriate conditions for sediment washing.
Sequential Extraction Of Metal Contaminated Soils With Radiochemical Assessment Of Readsorption Effects
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Author : Mark D. Ho
language : en
Publisher:
Release Date : 2000
Sequential Extraction Of Metal Contaminated Soils With Radiochemical Assessment Of Readsorption Effects written by Mark D. Ho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Heavy metals categories.
Analytical evaluation of the Tessier method of sequential extraction of soil and sediment samples to assess the potential bioavailability of metals in the sample. The study, which was conducted to evaluate the importance of the finding that some extracted metals readsorbed onto samples, found that the Tessier method was valid for copper.
Metals Speciation In Soils
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Author :
language : en
Publisher:
Release Date : 1996
Metals Speciation In Soils written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Metals categories.
Biophysico Chemical Processes Of Heavy Metals And Metalloids In Soil Environments
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Author : Antonio Violante
language : en
Publisher: John Wiley & Sons
Release Date : 2007-11-27
Biophysico Chemical Processes Of Heavy Metals And Metalloids In Soil Environments written by Antonio Violante and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-27 with Science categories.
Written by a multidisciplinary group of soil and environmental scientists, Biophysico-Chemical Processes of Heavy Metals and Metalloids in Soil Environments provides the scientific community with a critical qualitative and quantitative review of the fundamentals of the processes of pollutants in soil environments. The book covers pollutants' speciation, mobility, bioavailability and toxicity, and impacts on development of innovative restoration strategies. In addition, the development of innovative remediation strategies for polluted soils is covered.
Evaluation Of Soil Washing For Radiologically Contaminated Soils
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Author :
language : en
Publisher:
Release Date : 1994
Evaluation Of Soil Washing For Radiologically Contaminated Soils written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Soil washing has been applied internationally to decontaminate soils due to the widespread increase in environmental awareness manifested in the United States by promulgation of the Comprehensive Environmental Response, Compensation and Liability Act, yet we continue to lack understanding on why the technique works in one application and not in another. A soil washing process typically integrates a variety of modules, each designed to decontaminate the matrix by destroying a particular phase or segregating a particle size fraction in which the contaminants are concentrated. The more known about how the contaminants are fixed, the more likely the process will succeed. Much can be learned from bioavailability studies on heavy metals in soils. Sequential extraction experiments designed to destroy one fixation mechanism at a time can be used to determine how contaminants are bound. This knowledge provides a technical basis for designing a processing strategy to efficiently decontaminate soil while creating a minimum of secondary wastes. In this study, a soil from the Idaho National Engineering Laboratory was physically and chemically characterized, then sequentially extracted to determine if soil washing could be effectively used to remove cesium, cobalt and chromium.
Heavy Metal Partitioning In Soils Of Variable Texture And Redox Potential
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Author : Robert John Ellis
language : en
Publisher:
Release Date : 1999
Heavy Metal Partitioning In Soils Of Variable Texture And Redox Potential written by Robert John Ellis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Heavy metals categories.
Heavy Metal Contamination Of Water And Soil
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Author : Elham Asrari
language : en
Publisher: CRC Press
Release Date : 2014-02-06
Heavy Metal Contamination Of Water And Soil written by Elham Asrari and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-02-06 with Science categories.
This title includes a number of Open Access chapters.Although adverse health effects of heavy metals have been known for a long time, exposure to heavy metals continues and is even increasing in some areas. Remediating heavy metal contaminated soils and water is necessary to reduce the associated health and ecological risks, make the land resource
Heavy Metal Contamination Of Soils
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Author : Irena Sherameti
language : en
Publisher: Springer
Release Date : 2015-04-06
Heavy Metal Contamination Of Soils written by Irena Sherameti and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-06 with Technology & Engineering categories.
Following a description of the various sources and factors influencing the contents of heavy metal pollution in post-catastrophic and agricultural soils, subsequent chapters examine soil enzymes and eggs as bio-monitors, lead adsorption, the effects of arsenic on microbial diversity, and the effects of Mediterranean grasslands on abandoned mines. A third section focuses on the adaptation strategies used by plants and bacteria, such as Pinus sylvestris in industrial areas, and the rhizosphere in contaminated tropical soils and soil treated with sewage sludge. Further topics addressed include strategies of bioremediation, e.g. using transgenic plants as tools for soil remediation. This new volume on heavy metals in soil will be of interest to researchers and scholars in microbial and plant biotechnology, agriculture, the environmental sciences and soil ecology.
Environmental Remediation Technologies For Metal Contaminated Soils
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Author : Hiroshi Hasegawa
language : en
Publisher: Springer
Release Date : 2015-09-28
Environmental Remediation Technologies For Metal Contaminated Soils written by Hiroshi Hasegawa and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-28 with Technology & Engineering categories.
This book presents a comprehensive and detailed description of remediation techniques for metal-contaminated soils derived from both natural processes and anthropogenic activities. Using a methodical, step-by-step presentation, the book starts by overviewing the origin of toxicants and the correlated comparative extent of contamination to the environment. The legal provisions as proposed or applied in different countries are then discussed to explain the global regulatory situation regarding soil contamination and the extent of consequent concern. The core part of this publication describes the major techniques for in situ or ex situ treatment of the contaminated soil to meet the regulatory limits. Finally, risk evaluation is incorporated, giving special attention to possible impacts during or after implementation of the remediation strategies. The intrusion of metals in soils mostly occurs from various anthropogenic activities, e.g., agricultural practices, industrial activities, and municipal waste disposal. The volumes of metal-contaminated soil are becoming greater than before and are ever-increasing due to rapid urbanization, intensified industrialization, and/or population booms in certain parts of the world. Hence, the options previously proposed, such as isolation of the contaminated site or movement of the contaminated mass to a secure disposal site after excavation, are becoming unsuitable from the economic point of view, and instead, decontamination alternatives are preferred. This book will help readers such as scientists and regulators to understand the details of the remediation techniques available to deal with the soils contaminated by toxic metals.