Download or read book Leaching of Heavy Metals from Fly Ash Stabilized Soils written by Md Sazzad Bin-Shafique and published by . This book was released on 2002 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaching of Heavy Metals from Fly Ash Stabilized Soils Used in Highway Pavements written by Md Sazzad Bin-Shafique and published by . This book was released on 2002 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Immobilization of Heavy Metals from the Strucutural Fill Using Fly Ash written by Manik Chandra Mitra and published by . This book was released on 2013 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to ACAA, only 43 percent of the 130.1 million tons of coal ash produced in the US in 2011 was beneficially used (ACAA 2011). Since the fly ash contains hazardous material including heavy metals, the unused fly ashes are dumped in landfill which costs a huge amount of money every year. Although fly ash could be used in many geotechnical applications, such as, structural fill, soil stabilization, fillable fill etc., but the use of fly ash is restricted by environmental regulations due to leaching of hazardous materials possesses a huge threat to the environment. If the hazardous materials, especially the heavy metals could be stabilized, a huge amount of fly ash could be used for beneficial use. This study is focused to immobilize the heavy metals from the fly ash structural fill using relatively low cost triple super phosphate (TSP) and the results are compared with widely used metal stabilization method using chelating agent (EDTA). One Class C and one Class F fly ash were mixed with different dosage of TSP (0%, 2%, 4%, 6%, and 8%) or EDTA (0.2%, 0.4%, 1%, and 2%), and then compacted after adding 15% water to achieve a compacted structural fill. The mixtures were allowed to cure for seven days and then subjected to standard Toxicity Characteristic Leaching Procedure (TCLP). Both TCLP extraction fluids with pH 4.93 and 2.88 were used for the TCLP tests. Additionally, a water leach test (extraction fluid pH = 7) was also conducted using the same solid-liquid ratio to understand the leaching characteristics at different pH of the extraction fluid. The leachates from the leaching tests were subjected to chemical analysis to determine the concentration of metals. For both stabilizers, the leaching of metals showed three distinctive patterns as the stabilizer dosage was increased. Firstly, leaching of some of the metals remained unchanged as the stabilizer content was increased. Secondly, leaching of some of the metals decreased as the stabilizer content was increased, and finally leaching of some of the metals decreased dramatically and went below the detection limit even after using the lowest dosage of the stabilizers. However, the effect of TSP on metal leaching was significantly different than that of EDTA for different metals. As the pH of the extraction fluid decreased, the leaching of metals increased for most of the metals. However, the effect of the stabilizers had the similar effect.
Download or read book The Effect of the Heavy Metal Immobilization Agents on the Strength of Fly Ash Treated Soils and the Long term Stability of the Agents written by Shahid Rehman and published by . This book was released on 2014 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In United States, a large amount of electricity is produced by the burning of coal in power plants produce an immense amount of ash (bottom and fly ash) each year. Fly ash contains hazardous or toxic materials such as heavy metals. If without appropriate treatments, before dumping fly ash in land-fills, heavy metals may leach from the fly ash and contaminate the ground water. This study describes the laboratory evaluation of the effects of the heavy metal immobilization agent on the strength of fly ash treated soil and the long term stability of the immobilization agent. Ethylenediaminetetraacetic acid (EDTA) and Triple Super Phosphate (TSP) were used as immobilization agents and mixed at different ratios, ranging from 0 % to 6 %, with fly ash to check the effect on geotechnical properties of fly ash and long-term resistance to heavy metals found in fly ash. Two types of fly ash, Class C and Class F were mixed with different dosage of TSP (0 % to 6 %) and EDTA (0 % to 1 %) at optimum moisture contents (OMC) to achieve a compacted structural fills. The geotechnical properties of the samples were tested by means of unconfined compressive strength (ASTM-D2166/D2166M-13) at curing periods of 7, 14 and 28 days and for the long-term stability of the agents were tested by the means of standard test method for leaching solid material in a column apparatus (ASTM-D4874-95). For fly ash Class C, adding either EDTA or TSP decreased the fly ash's compressive strength. At 28 days, the average peak compressive strength of the cured fly ash specimens was 1549 kPa. EDTA lowered the compressive strength to 958 from 1549 kPa, while TSP lowered the compressive strength to 950 from 1549 kPa. Fly ash only gives a max compressive strength because of its cementious nature. For fly ash Class F, EDTA did not noticeably affect on the compressive strength of the fly ash, but TSP increased the strength. When TSP was added to fly ash, it showed increase from 58 (fly ash only) to 161 kPa. To immobilize the heavy metal from fly ash, it is recommended to use TSP as chelating agent to achieve the maximum compressive strength. TSP showing the same compressive strength compared to EDTA at 28 days curing time and TSP is very cheap compared to EDTA. For long-term stability of the immobilization agent used with fly ash Class C, it was founded that TSP worked well for almost all of the heavy metals except As. EDTA also showed good immobilization to heavy metals except Hg and Pb. For fly ash Class F, TSP showed better results for the stabilization of Hg and Pb and worst towards As. Addition of EDTA enhanced the stabilization of Cd, Cr, Zn, and As. EDTA gave good response to some metals and TSP gave well to others. The combination of EDTA and TSP showed excellent results towards immobilization of the metals.
Download or read book Potential for Using Paper Mill Fly ash as an Alternate Liming Material and Mobility and Leachability of Heavy Metals in Fly ash and Biochar Amended Agricultural Soil in Western Newfoundland written by Gnanakaran Maheswaran and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Most agricultural soils in Western Newfoundland are acidic and need lime to raise the soil pH to be productive. Corner Brook Pulp and Paper Ltd produces a substantial amount of fly-ash which is being disposed at a local landfill. This study was conducted to assess the potential for using fly-ash as a liming material for an agricultural soil (pH:5.5) in Western Newfoundland with the addition of biochar for heavy metal stabilization. Heavy metal concentration in the soil and fly-ash were analysed and compared with soil and compost guidelines. Lab scale leaching and pot experiments were conducted to assess the leaching and bioavailability of heavy metals in fly-ash amended soil with different biochar rates. As per quality guidelines, only part of the lime requirement can be substituted by fly-ash. Biochar increased the soil pH and biomass production. Total heavy metal leached from biochar treated soils were low and unlikely to cause groundwater contamination. In general biochar reduces the leachability and the bio availability of heavy metals. Application of biochar could provide a sustainable solution for the heavy metal stabilization of fly-ash treated soil.
Download or read book Clean Coal Technologies written by Rajesh Kumar Jyothi and published by Springer Nature. This book was released on 2021-05-10 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of art of the several advanced approaches to beneficiation of coal. The influence of recent technology attains the advantages of processing coal, purification studies, rheological behavior, and the mineral beneficiation. The experts collected in this volume have contributed significantly to the enrichment in the in depth knowledge not only in context of working knowledge, but also future prospects of clean coal technology.
Download or read book Leaching from Soil Stabilized with Fly Ash written by Kanokwan Komonweeraket and published by . This book was released on 2010 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring and Evaluation of Fly Ash Stabilization Stabilized Subgrade Constructed by the WisDOT written by Tuncer Edil and published by . This book was released on 2010 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Metals Leaching from Gray Iron Foundry and Coal Combustion Byproducts written by Jacob J. Sauer and published by . This book was released on 2006 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Environmental Engineering written by Myer Kutz and published by John Wiley & Sons. This book was released on 2018-07-25 with total page 767 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide for both fundamentals and real-world applications of environmental engineering Written by noted experts, Handbook of Environmental Engineering offers a comprehensive guide to environmental engineers who desire to contribute to mitigating problems, such as flooding, caused by extreme weather events, protecting populations in coastal areas threatened by rising sea levels, reducing illnesses caused by polluted air, soil, and water from improperly regulated industrial and transportation activities, promoting the safety of the food supply. Contributors not only cover such timely environmental topics related to soils, water, and air, minimizing pollution created by industrial plants and processes, and managing wastewater, hazardous, solid, and other industrial wastes, but also treat such vital topics as porous pavement design, aerosol measurements, noise pollution control, and industrial waste auditing. This important handbook: Enables environmental engineers to treat problems in systematic ways Discusses climate issues in ways useful for environmental engineers Covers up-to-date measurement techniques important in environmental engineering Reviews current developments in environmental law for environmental engineers Includes information on water quality and wastewater engineering Informs environmental engineers about methods of dealing with industrial and municipal waste, including hazardous waste Designed for use by practitioners, students, and researchers, Handbook of Environmental Engineering contains the most recent information to enable a clear understanding of major environmental issues.
Download or read book Use of Fly Ash in Concrete written by and published by . This book was released on 1989 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Fly Ash written by Kamal K. Kar and published by Butterworth-Heinemann. This book was released on 2021-11-07 with total page 869 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drive to develop more sustainable materials has made fly ash a valuable raw material in many different applications. Comprehensive and authoritative, Handbook of Fly Ash highlights the latest research efforts to develop the properties of fly ash to maximum utility while safeguarding the environment. This book takes an interdisciplinary approach to the research into the classification and compositions of various types of fly ash, such as bottom ash and boiler slag, special classes of fly ash, and their sources around the globe. This is followed by a discussion of fly ash-reinforced composites, such as elastomer-based composites and metal matrix composites. This book also covers a wide range of applications of fly ash in cement, concrete, bricks and blocks, road construction, wastewater treatment, and scrubber sludge solidification. - Highlights the recent developments in the utilization of fly ash including its preparation, functionalization, properties, and handling. - Places a focus on a wide variety of fly ash applications including recent innovations, such as alkali-activated binder, polypropylene composite, and geopolymer concrete. - Includes comprehensive coverage of the characteristics of fly ash with a particular focus on health hazards if it is not properly disposed. - Discusses fly ash-reinforced composites, such as polymer/elastomer-based composites and metal matrix composites.
Download or read book Leaching Behavior of Hazardous Heavy Metals from Lime Fly Ash Cements written by Ojas A. Chaudhari and published by . This book was released on 2011 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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.
Download or read book Leaching of Metals from High Carbon Fly Ash Mixed Soils written by Bora Cetin and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of GeoShanghai 2018 International Conference Geoenvironment and Geohazard written by Arvin Farid and published by Springer. This book was released on 2018-05-10 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the seventh volume of the proceedings of the 4th GeoShanghai International Conference that was held on May 27 - 30, 2018. This volume, entitled “Geoenvironment and Geohazards”, presents the recent advances and technology in geoenvironmental engineering and geohazards. The state-of-the-art theories, methodologies and findings in the related topics are included. This book may benefit researchers and scientists from the academic fields of soil & rock mechanics, geotechnical engineering, geoenvironmental engineering, transportation engineering, geology, mining and energy, as well as practical engineers from the industry. Each of the papers included in this book received at least two positive peer reviews. The editors would like to express their sincerest appreciation to all of the anonymous reviewers all over the world, for their diligent work.
