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The GDT™ Process is ideally suited to strip radon from water due to the high Henry’s law constant and pressurized operational design. Excellent radon removal is achieved in minimal space at low capital and operating costs.
About Radon:
Radon is a colorless, odorless, tasteless, naturally occurring gas. It is also radioactive. Radon
is an inert gas like helium, which means it does not chemically react with other substances. Therefore,
radon may be present in, and move readily through rocks, soil, groundwater, and air. Radon in rock or
soil out gases into water or air and is carried into buildings where levels can increase in confined
spaces and cause health concerns.
You cannot see radon. And you cannot smell it or taste it. But it may be a problem in your home.
That is because when you breathe radon, you increase your risk of getting lung cancer. In fact, the
Surgeon General has warned that radon is the second leading cause of lung cancer in the United States
today.
Radon comes from the natural breakdown, or radioactive decay, of three radioactive isotopes:
uranium-238, uranium-235, and thorium-232. These isotopes are typically found in igneous and metamorphic
rocks, such as granite and gneiss, and in sedementary rocks such as organic rich black shale, phospatic
rock and coal. Radon levels may also be found in areas where uranium and phosphate mining wastes were
used as fill material for construction.
Radon occurs in groundwater, but not surface water. Its absence in surface water is related to its
volatility, radon simply escapes from surface water into the atmosphere. Radon in groundwater is
dissolved; the way carbon dioxide in a carbonated beverage is dissolved. Due to the short half-life
of radon and the typically slow rate of natural groundwater flow, radon in groundwater typically
cannot migrate far from its source. Therefore, if high concentrations of radon occur in groundwater,
the presence of high concentrations of the parent radionuclides in the aquifer also exist.
THE U.S. EPA "Report to the United States Congress on Radon in Drinking Water", dated
March 1994 estimated that approximately 19 million people in the U.S. are exposed to water with radon
above the 300 pCi/L MCL level proposed in 1991 and not yet promulgated into law. The EPA report also
stated, "...the cancer risk from radon in water is higher than the cancer risk estimated from
any other drinking water contaminant."
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