- The laboratory contains: several Portable Continuous Radon Gas Monitors, ... U.S. Geologic al Survey Radon Homepage · American Lung Association Fact Sheet ... A Computer Program for Calculating Cancer Risks from Radon ... K. J. Renken and T. Lambert, "The Utilization of Fly Ash and Silica Fume to Reduce Radon Gas ...
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- Fly ash - A by-product of coal burning, fly ash is a fine, .... Radon - Radon is a cancer-causing, radioactive gas. Radon comes from the ... The Surgeon General says radon is the second leading cause of lung cancer in the United States. ...
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- 22 Jun 2009 ... Radon is a cancer-causing natural radioactive gas that you can't see, .....power plants and breathing in micro particles of fly ash 24×7. ...
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- OF CALIBRATION FACILITIES FOR RADON GAS ACTIVITY CONCENTRATION .... N203, RADIOENVIRONMENTAL SURVEY OF THE MEGALOPOLIS POWER PLANTS FLY-ASHDEPOSITS ... N243, META-ANALYSIS OF TWENTY RADON AND LUNG CANCER CASE CONTROL STUDIES ...
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- Design/methodology/approach – An initial slope of radon gas growth against time and a mass... atmosphere is at risk from lung cancer (Field et al., 2003; Godish, 1989; Kenneth, 1990).... Stone with fly ash. 3.3. 41. Concrete (Germany
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From Wikipedia, the free encyclopedia
Fly ash is one of the residues generated in the combustion of coal. Fly ash is generally captured from the chimneys of coal-fired power plants, and is one of two types of ash that jointly are known as coal ash; the other, bottom ash, is removed from the bottom of coal furnaces. Depending upon the source and makeup of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2) (both amorphous and crystalline) and calcium oxide (CaO), both being endemic ingredients in many coal bearing rock strata.
Toxic constituents depend upon the specific coal bed makeup, but may include one or more of the following elements or substances in quantities from trace amounts to several percent:arsenic, beryllium, boron, cadmium, chromium, chromium VI, cobalt, lead, manganese,mercury, molybdenum, selenium, strontium, thallium, and vanadium, along with dioxins andPAH compounds.
In the past, fly ash was generally released into the atmosphere, but pollution control equipmentmandated in recent decades now require that it be captured prior to release. In the US, fly ash is generally stored at coal power plants or placed in landfills. About 43 percent is recycled, often used to supplement Portland cement in concrete production. Some have expressed health concerns about this. Fly ash is increasingly finding use in the synthesis of geopolymersand zeolites.