Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash written by T. L. Theis and published by . This book was released on 1975 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash Final Report written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Information is provided on laboratory and field research to assess the aquatic effects and extent of release, migration, and attenuation of trace metals from fly ash into subsurface soil environments for a typical disposal regime. Those metals analyzed were arsenic, cadmium, chromium, copper, lead, mercury, nickel, and zinc. Laboratory studies indicated that the major effects of fly ash in water were pH alterations, which could be either acidic or basic, and comparatively high proportions of trace metals released from the ash surface, controlled largely by pH. Field studies confirmed the continued importance of pH in defining the attenuation of the metals by the soil but also suggested that pSO4, ionic strength, and soil chemical parameters, such as iron and manganese content, could not be ignored. Theoretical thermodynamic analysis in concert with field data indicated that both adsorption onto soil phases and precipitation of metal phases occurred, the dominant attenuation mechanism depending upon the specific metal and soil conditions.
Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash Technical Progress Report June 1 1977 March 31 1978 written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been undertaken on a specific ponded fly ash disposal site to determine the degree of subsurface leaching of various ionic forms, especially heavy metals. The location is the site of the Michigan City generating station of the Northern Indiana Public Service Company, Michigan City, Indiana. The present ash ponding system consists of two primary ash ponds (volume of each 16.5 million gallons) which are loaded alternately, i.e., when one is in service the other is allowed to dry for the removal operation. The ash is sluiced to the ponds in a concentrated slurry. After primary and secondary settling the water is brought back for further ash sluicing. A constant elevation is maintained in the ponds at approximately 31.5 feet above the surface of Lake Michigan. The system cannot be considered closed because of losses due to evaporation and subsurface leaching. The station produces 340 to 400 tons of fly ash per day when operating at full capacity. A typical pond cycle requires six to nine months between removal periods. Observation wells were installed at various locations. Typically, the chemical composition of the groundwater varied with both time in the pond cycle as well as distance from the pond. Heavy metal concentrations decreased rapidly from the rather high levels found in the pond but a smaller peak concentration occurred some 100 meters from the pond after which the concentration decreased to rather low levels. The dominant mechanisms of attenuation are adsorption of metals onto hydrous oxides of iron and manganese and precipitation of various solid phases.
Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash Technical Progress Report September 1 1976 May 31 1977 written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Field studies were conducted at the fly ash disposal site of a 735 MW coal-fired power plant. Disposal consisted of ponding the ash followed by eventual removal and ultimate deposition as fill. Several sampling wells were made in order to monitor the groundwater quality. Trace metals analyzed include As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn. Results indicated that trace metals are released to the groundwater from the pond at generally low levels. Increased concentrations several times the normal levels were observed when the pond first began the filling cycle and again when maintenance procedures brought about a large fly ash loading in a short time. Metals were found to accumulate in soils at the point of confluence of the pond seepage water with the natural groundwater which was high in dissolved carbonate. Deposition as carbonates and adsorption of metals onto the higher levels of hydrous iron and manganese oxides were considered responsible for this. Effective control strategies, if deemed necessary, would include pH adjustment of pond water with lime or limestone, lining of ponds with natural or chemical materials, and relocation to a more environmentally suitable site.
Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash Technical Progress Report June 1 1975 February 29 1976 As Ca Cd Cr Cu Fe Hg Pb Zn written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Major emphasis was placed on laboratory evaluations of heavy metal associations with fly ash. Data are presented showing that most fly ashes contain considerable amounts of As, Ca, Cd, Cr, Cu, Fe, Hg, Pb, and Zn. Desorption studies suggest that pH and the presence of various heavy metal sinks on the ash particle surface (notably hydrous iron oxides) play significant roles in the release of these metals into solution. Adsorption studies using natural ash leachate/soil systems and vertical soil columns give quantitative estimates (through the use of adsorption isotherms) of the degree of attenuation of the heavy metals. Results verify the importance of solution pH and iron oxide concentration. In general the element cadmium shows the least tendency toward sorbing onto local solid phases while lead is sorbed to the greatest extent. Among soil types, organic peat was the most effective in removing metals while silica was least effective.
Download or read book Contamination of Groundwater by Heavy Metals from the Land Disposal of Fly Ash Technical Progress Report June 1 1976 August 31 1976 written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A useful method of differentiating surface from total heavy metals associated with fly ash is selective extraction for those metal oxide sinks (Fe, Al, Mn) with which the heavy metals have become associated. This association is important in defining the release of the metals in aqueous environments. This desorption, as well as subsequent adsorption onto local soil matter is pH dependent, lower pH values favoring greater release or less adsorption in the system. Another aspect of trace metal chemistry is solubility, which generally decreases with increasing pH. In view of this pH dependency, it would appear that the more critical case of potential contamination of water resources is that of the acid fly ashes, i.e., those where iron oxide deposits control the pH of the system. The problem could be reduced by maintaining the ash in a neutral or alkaline environment, although at extremely high pH values (approximately 12) the desorbtive tendency of most metals increased slightly. Even at neutral pH values, soluble complexes may increase the concentration of a given metal in excess of solubility. The average percentage of metals released for all fly ashes studied from their surface sinks at pH = 9 were cadmium--17 percent, lead--8 percent, chromium--6 percent, copper--1 percent, and zinc less than 1 percent. Another important factor is the absolute amount of metal on the surface. For instance, even though copper is released very little at neutral pH's, surface concentrations up to 200 .mu.g/g of fly ash were found.
Download or read book Metals in Groundwater written by Herbert E. Allen and published by CRC Press. This book was released on 2020-11-25 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal contamination of groundwater results from many human activities, including agriculture, mining, and the disposal of municipal waste and fly ash. Metals in Groundwater describes the transport of metals to groundwater from these and other sources. It also covers risk assessment of metals in groundwater, coupling of chemicals and hydrological models, and sorption of metals onto soils and clays. The speciation of metals is examined in detail. The book will interest researchers in environmental quality, mining, and agriculture; consultants; industry professionals; and personnel within regulatory agencies.
Download or read book Heavy Metal Contamination of Water and Soil written by Elham Asrari and published by CRC Press. This book was released on 2014-02-06 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contamination of Water written by Arif Ahamad and published by Elsevier. This book was released on 2021-08-06 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water containing significant amounts of inorganic and organic contaminants can have serious environmental consequences and serious health implications when ingested. Contamination of Water: Health Risk Assessment and Treatment Strategies takes an interconnected look at the various pollutants, the source of contamination, the effects of contamination on aquatic ecosystems and human health, and what the potential mitigation strategies are. This book is organized into three sections. The first section examines the sources of potential contamination. This includes considering the current scenario of heavy metal and pesticide contamination in water as well as the regions impacted due to industrialization, mining, or urbanization. The second section goes on to discuss water contamination and health risks caused by toxic elements, radiological contaminants, microplastics and nanoparticles, and pharmaceutical and personal care products. This book concludes with a section exploring efficient low-cost treatment technologies and remediation strategies that remove toxic pollutants from water. Contamination of Water incorporates both theoretical and practical information that will be useful for researchers, professors, graduate students, and professionals working on water contamination, environmental and health impacts, and the management and treatment of water resources. - Provides practical case studies of various types and sources of contamination - Discusses inorganic and organic contaminants and their impact on human health - Evaluates effective water treatment and remediation technologies to remove toxins from water and minimize risk
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook Of Environment And Waste Management Volume 2 Land And Groundwater Pollution Control written by Yung-tse Hung and published by World Scientific. This book was released on 2013-12-24 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Environment and Waste Management, Volume 2, Land and Groundwater Pollution Control, is a comprehensive compilation of topics that are at the forefront of many of the technical advances and practices in solid waste management and groundwater pollution control. These include biosolids management, landfill for solid waste disposal, landfill liners, beneficial reuse of waste products, municipal solid waste recovery and recycling and groundwater remediation.Internationally recognized authorities in the field of environment and waste management contribute chapters in their areas of expertise. This handbook is an essential source of reference for professionals and researchers in the areas of solid waste management and groundwater pollution control, and as a text for advanced undergraduate and graduate courses in these fields.
Download or read book Solid Waste Management written by Dorothy P. Mitchell and published by . This book was released on 1979 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Health Perspectives written by and published by . This book was released on 1993 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
