• Radium (Ra) is a naturally occurring radioactive element that is present in rocks and soil within the earth’s crust. Small quantities of radium derived from these sources can also be found in groundwater supplies. Radium is a radioactive element and carcinogen. Exposure can pose health risks over long periods of time.
  • Radium is an exchangeable cation, and can therefore be removed with the very same process that is used for water softening. That process involves passing the water through a tank that contains cation resin. The radium cation is then exchanged for a more tolerable cation.
  • Radium also inherently co-precipitates with manganese, and can be removed through simple filtration. Radium and manganese are exposed to an oxidant and form an insoluble particulate. Radium and manganese are then simply filtered out of the water as it passes through a GreensandPlus™ filter, after which the filter is backwashed to restore it for subsequent service.
  • Finally, Radium can be captured on certain inherently absorptive media surfaces. The media eventually becomes saturated and is considered “sacrificial” and must be removed and replaced with new media.
AWWA HMO Paper
Radium
96” vertical greensand plus pressure filter
96” vertical greensand plus pressure filter
72” vertical greensand plus pressure filter
72” vertical greensand plus pressure filter