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 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 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 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 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 The Influence of Cation Exchange Capacity on Metals Leaching from Soil Amended Fly Ash written by Michael J. Glade and published by . This book was released on 1992 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Chemical Treatment of Fly Ash on the Leaching of Metals written by M. Boybay and published by . This book was released on 1984 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted to determine the ability of chemical treatment to reduce the leaching of metals from fly ash. A further objective was to determine the effect of cofiring refuse-derived fuels with coal on leachate composition. Samples of fly ash were treated with portland cement, chemically pure lime, and phosphoric acid and subjected to a column leaching process. The leachates were composited weekly and analyzed using X-ray fluorescence and atomic absorption spectrometry.
Download or read book EPA 530 K written by and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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 Sorption and Leaching Characteristics of Heavy Metals in Artificial Soil written by Joshua Bergsten and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate the heavy metal sorption and leaching characteristics of an "artificial soil" formed by blending industrial and municipal by-products and implemented as a beneficial waste reuse and land reclamation strategy. Materials at the site include an organic-rich O-horizon (yard waste and biosolids) overlying a mineral-rich C-horizon (CKD and coal ash) to simulate a natural residual soil profile. A laboratory investigation of the general engineering, sorptive, and leaching properties of an artificial soil comprising yard waste, biosolids, cement kiln dust (CKD) and coal ash was completed. It consisted of testing for natural (in-situ) moisture content, pH, carbon content, microstructure (via SEM imaging), batch sorption characteristics, and leaching characteristics determined by flow-through column tests. The trends evident in the moisture content, pH, and carbon content profiles support the presence of a cemented Bh layer noted in the field test site at the interface between the O and C Horizon. Batch sorption tests show the artificial soil mix to be very effective in immobilizing free Cd, Pb, and Zn, even at very large concentrations. Leaching with ammonium nitrate to represent plant available amounts proved to be minimal. Column leaching tests confirmed these results, as no detectable amount of Cd, Pb, or Zn leached from prepared soil columns after more then 30 pore volumes of flow.
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 Effect of Flow Rate on Leaching of Metals from Fly Ash and Stabilized Fly Ash written by Daniel N. Creek and published by . This book was released on 1991 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remediation of Heavy Metals written by Inamuddin and published by Springer Nature. This book was released on 2021-11-10 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents recent remediation techniques for heavy metal contamination in wastewater, with a focus on recently-developed and sustainable materials such as metal oxides and their composites, two-dimensional materials, organic-inorganic ion exchange materials, nanomaterials, bagasse, and olive-oil waste chelating materials. Chapters also describe the analysis of heavy metals, membranes for water treatment, sources and impact of heavy metals and opportunities and challenges in heavy metal remediation.
Download or read book Recycling of Biomass Ashes written by Heribert Insam and published by Springer Science & Business Media. This book was released on 2011-07-09 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of renewable bioenergy is increasing, and so is the production of associated wastes: biomass ashes. This book presents eleven chapters on the options for recycling such biomass ashes, ranging from their use as fertilizer in agriculture and forestry to their application as a supplement for the production of cement-based materials or bricks. The book also examines the pros and cons for each of the different uses of biomass ashes.
