Leaching Characteristics Of Inorganic Contaminants From Coal Fly Ash

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Leaching Characteristics of Inorganic Contaminants from Coal Fly Ash

Author : Tingzhi Su
Publisher :
ISBN 13 :
Total Pages : 446 pages
Book Rating : 4.:/5 (87 download)

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Book Synopsis Leaching Characteristics of Inorganic Contaminants from Coal Fly Ash by : Tingzhi Su

Download or read book Leaching Characteristics of Inorganic Contaminants from Coal Fly Ash written by Tingzhi Su and published by . This book was released on 2011 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Leaching of trace elements raises environmental concerns in coal fly ash disposal and reuse. US EPA is in the process of creating the first national rule on coal ash management. However, due to the complexity of coal fly ash composition, the leaching characteristics of trace elements are not well understood. Meanwhile, driven by the tightening emission regulations, new types of coal fly ashes are continuously generated as a result of the technological evolution at coal energy industry. The changing landscape highlights the needs for a comprehensive database to assess the leaching characteristics of different types of coal fly ashes, evaluation of the emission control technology on the ashes produced in the power industry, a practical method to predict the leachability of trace contaminants, and effective methods to remediate inorganic contaminants in fly ash. This study investigated the leaching of a group of concerned inorganic contaminants from different types of fly ashes, and assessed the impact of trona inject for SO2 emission control at coal combustion plants on the fly ash produced. The results showed that trona injection greatly changed the fly ash physical and chemical composition, and significantly enhanced the leaching characteristics of oxyanionic trace elements, especially arsenic (As) and selenium (Se). A protocol was developed to quantify the availability and stability of As and Se in raw bituminous fly ash under various field conditions. The effectiveness of EDT A-washing in remediating fly ash was studied, and the results demonstrated promising application of EDT A in removing toxic trace elements, including As and Se, from low-Ca coal fly ashes"--Abstract, leaf iv.

Leaching Characteristics of Selected Elements from Coal Fly Ash as a Function of the Acidity of the Contact Solution and the Liquid/Solid Ratio

Download Leaching Characteristics of Selected Elements from Coal Fly Ash as a Function of the Acidity of the Contact Solution and the Liquid/Solid Ratio PDF Online Free

Author : GJ. de Groot
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Leaching Characteristics of Selected Elements from Coal Fly Ash as a Function of the Acidity of the Contact Solution and the Liquid/Solid Ratio by : GJ. de Groot

Download or read book Leaching Characteristics of Selected Elements from Coal Fly Ash as a Function of the Acidity of the Contact Solution and the Liquid/Solid Ratio written by GJ. de Groot and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: To estimate the environmental consequences of the storage and utilization of coal fly ash, in the Netherlands a standard leaching test has been developed. In this test, leach conditions are used which aim at close approximation with field conditions. The standard test consists of three main parts: a column leaching test, a serial batch leaching test, and a test for the determination of maximum leachability. As a time scale the liquid/solid ratio (LS) is used, where LS is the ratio between the total quantity (L) of liquid used for leaching and the weight (kg) of the leached material. The relation between this relative time scale and the actual time scale depends on the time required for a given LS ratio to be reached in the actual situation.

Leachate Control of Coal Fly Ash Through Hydrophobicity and Contaminant Fixation

Author : Jenet Truelsen Hattaway
Publisher :
ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.:/5 (889 download)

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Book Synopsis Leachate Control of Coal Fly Ash Through Hydrophobicity and Contaminant Fixation by : Jenet Truelsen Hattaway

Download or read book Leachate Control of Coal Fly Ash Through Hydrophobicity and Contaminant Fixation written by Jenet Truelsen Hattaway and published by . This book was released on 2014 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research study was to determine whether the leaching of metals from coal fly ash can be reduced or eliminated by increasing hydrophobicity (water repellency) or contaminant fixation in fly ash. A secondary goal was determining how the newer EPA leaching tests compare with the Resource Conservation and Recovery Act (RCRA) specified Toxicity Characteristic Leaching Procedure (TCLP). Coal fly ash (CFA) is a product of coal combustion that is captured by air pollution control devices. The consistency and physical properties of fly ash make it a valuable substitute for a number of construction components such as road base, structural fill and as a partial substitute for cement in concrete mixtures. However, concerns that metals present in fly ash may leach and migrate into water supplies impacted the expanded use of coal fly ash. Millions of tons of fly ash are produced each year during electric power production and only 42% is recycled, primarily into concrete. Leaching occurs when water in contact with a solid material causes the solid to release some of its constituents into the contacting water. If water can be prevented from contacting the fly ash, leaching should not occur. Organosilanes (OS) are a family of chemicals that facilitate covalent bonding and render surfaces water repellent. Two different OS products were tested in this study as a method of imparting hydrophobicity to the fly ash. A contaminant fixation product, to sequester the metals in chemical bonds, was the third treatment tested. Treated and untreated coal fly ash was tested according to four different leaching procedures, methods 1311, 1313, 1314 and 1316 of the U.S. Environmental Protection Agency's "Test Methods for Evaluating Solid Waste, Physical/Chemical Methods" also known as SW-846. Method 1311 (TCLP) is the established leaching test used for regulatory screening to determine toxicity. Method 1311 was compared with Methods 1313, 1314, and 1316. The leachates were analyzed for seventeen metals: Aluminum, Arsenic, Barium, Boron, Cadmium, Calcium, Chromium, Copper, Iron, Lead, Magnesium, Manganese, Molybdenum, Selenium, Silicon, Vanadium, and Zinc. While no treatment tested prevented leachability of all constituents in this battery of leaching tests, different treatments were effective in reducing leaching of different constituents. For example, one OS treatment reduced arsenic concentrations 24% to 72% within the pH range of 5.5 to 10.5. This suggests that a chemical treatment may be developed that can prevent or reduce leachability. Analysis indicates that treatment efficacy varies with pH, test method and the metal analyzed. The extent to which these leaching results accurately reflect likely field performance remains unclear. Methods 1313, 1314 and 1316 provide more information about the leaching behavior of a material and may provide more appropriate regulatory guidance than Method 1311 (TCLP) if used with applicable environmental conditions rather than a blanket "worse case" scenario. The comparison also highlighted that Method 1311 (TCLP) may under report leaching concentrations for such elements as arsenic, selenium, and molybdenum when the material has a high natural pH.

Coal Fly Ash Beneficiation

Author : Segun Akinyemi
Publisher : BoD – Books on Demand
ISBN 13 : 9535137522
Total Pages : 210 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Coal Fly Ash Beneficiation by : Segun Akinyemi

Download or read book Coal Fly Ash Beneficiation written by Segun Akinyemi and published by BoD – Books on Demand. This book was released on 2018-01-31 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book deals with various, very significant topics of coal fly ash beneficiation, such as treatment of acid mine drainage with coal fly ash, toxic metal adsorption using coal fly ash, recovery of metals from coal fly ash and phytoreclamation of abandoned acid mine drainage site after treatment with coal fly ash, the status of research in coal fly ash utilization and applications and some other related topics in this growing and increasingly important research area. Overall, coal fly ash beneficiation has come to assume an important role in most areas of waste management research today. Continued growth and emphasis on scientific research is expected in all areas of waste management and conversion of waste to wealth technologies.

Leaching Characteristics of Various Elements from Coal Fly Ash

Author : Kazuo Sato
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (152 download)

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Book Synopsis Leaching Characteristics of Various Elements from Coal Fly Ash by : Kazuo Sato

Download or read book Leaching Characteristics of Various Elements from Coal Fly Ash written by Kazuo Sato and published by . This book was released on 1986 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Leaching Characteristics of Varios Elements from Coal Fly Ash

Author : Kazuo Sato
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (965 download)

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Book Synopsis Leaching Characteristics of Varios Elements from Coal Fly Ash by : Kazuo Sato

Download or read book Leaching Characteristics of Varios Elements from Coal Fly Ash written by Kazuo Sato and published by . This book was released on 1986 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Chemical Stabilization of Coal Fly Ash for Simultaneous Suppressing of As, B, and Se Leaching

Author : Sri Hartuti
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis Chemical Stabilization of Coal Fly Ash for Simultaneous Suppressing of As, B, and Se Leaching by : Sri Hartuti

Download or read book Chemical Stabilization of Coal Fly Ash for Simultaneous Suppressing of As, B, and Se Leaching written by Sri Hartuti and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The discard of coal fly ash produced from the combustion of pulverized coal in a coal-fired boiler of thermal power plants has led to environmental concerns. Due to the interaction of fly ash particles with weathering and hydrological processes, the rainfall leaches out toxic elements in coal fly ash from the ash heaps. This situation has been pointed out as a potential contamination of soil, surface, and groundwater. In this chapter, the available fly ash treatment techniques to minimize future release of toxic trace elements (arsenic, boron, and selenium) have been documented, and the recent investigations dealing with leaching suppression effect of arsenic, boron, and selenium from coal fly ash have been reviewed. The leaching characteristics of arsenic, boron, and selenium are discussed, and a simple and low-cost leaching control method is presented in the context of treating the fly ash through chemical stabilization technique using additives containing high levels of calcium. Experimental results described in this chapter show the chemical stabilization technique utilizing Ca-containing additives is an effective technique for simultaneous suppressing of As, B, and Se leaching from coal fly ash.

Characteristics of a Coal Fly Ash Subjected to Additional Processing

Author : Christopher W. Swan
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Characteristics of a Coal Fly Ash Subjected to Additional Processing by : Christopher W. Swan

Download or read book Characteristics of a Coal Fly Ash Subjected to Additional Processing written by Christopher W. Swan and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the results of a study of the physical and environmental properties of pre- and post-processed fly ashes (termed Raw and Processed fly ashes, respectively). The ashes were collected from a coal-fired power plant in the northeastern U.S. which utilizes a carbon burn-out unit (CBO) to prepare the fly ash for concrete and other construction applications. Measured physical properties included carbon contents via loss-on-ignition (LOI), specific gravities, gradation analyses, and scanning electron microscopy (SEM). In addition, total and leachable concentrations of lead, selenium, and arsenic were determined. Leachable concentrations were determined for leaching solution pHs varying between 1.5 and 11.5. When compared to Processed fly ash, Raw fly ashes had an expectedly higher LOI (approximately 2% versus 6% carbon content, respectively) and lower specific gravity (2.37 versus 2.18, respectively). Although the total metal content of the fly ashes was similar, leachable metal concentrations were notably higher for the Processed fly ash over the full range of leaching solution pHs evaluated. The test results indicate that the CBO process, at times necessary to create usable fly ash, can result in fly ashes with notably altered physiochemical properties that lead to higher leachable contaminant concentrations.

A Comparative Field and Laboratory Study of Fly Ash Leaching Characteristics

Author : D. J. R. Dodd
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (463 download)

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Book Synopsis A Comparative Field and Laboratory Study of Fly Ash Leaching Characteristics by : D. J. R. Dodd

Download or read book A Comparative Field and Laboratory Study of Fly Ash Leaching Characteristics written by D. J. R. Dodd and published by . This book was released on 1981 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Leaching Behaviour of Elements from Sub-bituminous Coal Fly Ash

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (697 download)

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Book Synopsis Leaching Behaviour of Elements from Sub-bituminous Coal Fly Ash by :

Download or read book Leaching Behaviour of Elements from Sub-bituminous Coal Fly Ash written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The disposal or use of coal fly ash in ponds, landfills or in construction of roads is a great concern, because of its leaching behavior. It has problem especially when elements from fly ash get leached and contaminate or degrade the quality of drinking water. The aim of this study is to investigate leaching behavior of metals from northeastern coal fly ash. Serial batch leaching test for elements namely Fe, Mn, Zn, Cu and Pb has been carried out with liquid to solid (L/S) ratio at 4 and 12. The pH of the leachate was weekly alkaline in nature, ranging from 7.39 to 7.90. Concentration of Fe and Mn in the leachate is higher than the maximum contaminant level of drinking water. However, concentration of elements in the leachate from the northeastern fly ash is less than that of the Gondwana fly ash. This is possibly due to the different physico-chemical properties of the fly ash.

Harmonization of Leaching/Extraction Tests

Author : L. Heasman
Publisher : Elsevier
ISBN 13 : 0080533302
Total Pages : 293 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Harmonization of Leaching/Extraction Tests by : L. Heasman

Download or read book Harmonization of Leaching/Extraction Tests written by L. Heasman and published by Elsevier. This book was released on 1997-06-10 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a unique compilation on the use of leaching/extraction methods in different fields. The use of leaching test methods is increasing in various areas including: waste treatment and disposal; incineration of waste; soil clean-up and reuse of cleaned soil; sludge treatment. This has led to (and may increasingly lead to) the development of a large number of very similar tests in these different fields. However, these developments are taking place with no clear understanding of their mutual relationships. In view of these developments, efforts are needed to harmonize the leaching procedures that could be adapted for different matrices, as well as validate the use of existing tests in other fields. The development of a wide variety of leaching/extraction tests for different matrices is undesirable from a regulatory point of view and undesirable for industry. Clarity in testing is crucial in producer-consumer relations. This collective document will assist in improving the understanding of leaching from a variety of sources and will, where appropriate, help to bring together the approaches used in different technical fields and in different countries.

Environmental Aspects of Construction with Waste Materials

Author : Th.G. Aalbers
Publisher : Elsevier
ISBN 13 : 008087519X
Total Pages : 1005 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Environmental Aspects of Construction with Waste Materials by : Th.G. Aalbers

Download or read book Environmental Aspects of Construction with Waste Materials written by Th.G. Aalbers and published by Elsevier. This book was released on 1994-05-20 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of Sustainable Development, implicating the protection of soil and groundwater, the limitation of waste production and the re-use of soild waste materials is still the leading theme of WASCON '94. Although it is clearly recognized in most countries that products derived from solid waste materials can be applied as construction materials, research is still needed to assess various environmental problems.

Experimental analysis of the leaching characteristics of residual Hygas coal gasification solids

Author : Richard G. Luthy
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.3/5 ( download)

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Book Synopsis Experimental analysis of the leaching characteristics of residual Hygas coal gasification solids by : Richard G. Luthy

Download or read book Experimental analysis of the leaching characteristics of residual Hygas coal gasification solids written by Richard G. Luthy and published by . This book was released on 1978 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Low Carbon Stabilization and Solidification of Hazardous Wastes

Author : Daniel C.W. Tsang
Publisher : Elsevier
ISBN 13 : 0128242523
Total Pages : 592 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Low Carbon Stabilization and Solidification of Hazardous Wastes by : Daniel C.W. Tsang

Download or read book Low Carbon Stabilization and Solidification of Hazardous Wastes written by Daniel C.W. Tsang and published by Elsevier. This book was released on 2021-09-24 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Carbon Stabilization and Solidification of Hazardous Wastes details sustainable and low-carbon treatments for addressing environmental pollution problems, critically reviewing low-carbon stabilization/solidification technologies. This book presents the latest state-of-the-art knowledge of low-carbon stabilization/solidification technologies to provide cost-effective sustainable solutions for real-life environmental problems related to hazardous wastes including contaminated sediments. As stabilization/solidification is one of the most widely used waste remediation methods for its versatility, fast implementation and final treatment of hazardous waste treatment, it is imperative that those working in this field follow the most recent developments. Low Carbon Stabilization and Solidification of Hazardous Wastes is a necessary read for academics, postgraduates, researchers and engineers in the field of environmental science and engineering, waste management, and soil science, who need to keep up to date with the most recent advances in low-carbon technologies. This audience will develop a better understanding of these low-carbon mechanisms and advanced characterization technologies, fostering the future development of low-carbon technologies and the actualization of green and sustainable remediation. Focuses on stabilization/solidification for environmental remediation, as one of the most widely used environmental remediation technologies in field-scale applications Details the most advanced and up-to-date low-carbon sustainable technologies necessary to guide future research and sustainable development Provides comprehensive coverage of low-carbon solutions for treating a variety of hazardous wastes as well as contaminated soil and sediment

Trace Elements in Coal and Coal Combustion Residues

Author : Robert F. Keefer
Publisher : CRC Press
ISBN 13 : 1000157938
Total Pages : 346 pages
Book Rating : 4.0/5 (1 download)

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Book Synopsis Trace Elements in Coal and Coal Combustion Residues by : Robert F. Keefer

Download or read book Trace Elements in Coal and Coal Combustion Residues written by Robert F. Keefer and published by CRC Press. This book was released on 2020-10-25 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trace Elements in Coal and Coal Combustion Residues focuses on trace metal chemistry of coal and coal combustion residues. Special emphasis is placed on management of coal combustion residues in electric power plants and the influence of coal and associated residues on soils, plants, water, and animals. Topics covered include a brief summary of research sponsored by Electric Power Research Institute, environmental pollution from coal combustion plants in low-rainfall regions, accumulation of trace elements in freshwater mussels near a power plant, testing to evaluate fossil fuel wastes by chemicals and isotopes, transport of metals from coal piles and ash impoundments, leachability and toxicity of metals in fly ash, and plant absorption of chemicals from ash. The book will be a useful reference for environmental and reclamation consultants, environmental engineers, toxicologists, environmental regulatory personnel, officials with electric power utilities and water treatment plants, and soil scientists.

Environmental Aspects of Trace Elements in Coal

Author : D.J. Swaine
Publisher : Springer Science & Business Media
ISBN 13 : 9401584966
Total Pages : 322 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Environmental Aspects of Trace Elements in Coal by : D.J. Swaine

Download or read book Environmental Aspects of Trace Elements in Coal written by D.J. Swaine and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Happy he who could learn the causes of things (Virgil, Georgics 11) There is clearly a place for a book on the environmental aspects of trace elements in coal, especially with the increasing use of coal for power production. Our aim is to provide relevant background information and to update the situation regarding trace elements during beneficiation, combustion, .atmospheric deposition, leaching from wastes anti reclamation. The outcome is a balanced account of the overall situation. The initial chapter gives the rationale behind the planning of the book and puts the topics into the context of trace elements in the environment, while the final chapter summarises the subject matter and conclusions of each chapter. The choice of authors was based on their specialised knowledge. Although every effort has been made to ensure uniformity in layout, use of units, references and the like, authors have been given some latitude in expression and their styles have not been curbed. This book is intended primarily for coal scientists and technologists involved in environmental aspects of trace elements during the mining of coal, its beneficiation and usage, especially for power generation, and for regulatory bodies. It is considered to be suitable for relevant postgraduate courses. Just as it has been said that one of Bruckner's symphonies has enough melodies for a Beethoven to have written ten symphonies, so this book has several chapters that could be themes for other books.

Municipal Solid Waste Incinerator Residues

Author : A.J. Chandler
Publisher : Elsevier
ISBN 13 : 0080537189
Total Pages : 1009 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Municipal Solid Waste Incinerator Residues by : A.J. Chandler

Download or read book Municipal Solid Waste Incinerator Residues written by A.J. Chandler and published by Elsevier. This book was released on 1997-04-09 with total page 1009 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text covers a broad spectrum of topics pertinent to the management of incinerator residues. Background information includes a history of incineration, and the influence of municipal waste composition, incinerator type air pollution control technologies on residue quality. Physical, chemical and leaching characteristics for the various ash streams are described, along with recommended sampling and evaluation methodologies. Residue handling and management options, including, treatment utilisation and disposal are also discussed in detail.