||Full Scale Radium Removal System for a Small Community.
Lauch, R. P. ;
Mangelson, K. A. ;
||Redhill Forest Property Owners Association, Fairplay, CO. ;Rocky Mountain Consultants, Inc., Englewood, CO.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Water treatment ;
Drinking water ;
Ground water ;
Ion exchanging ;
Water pollution control equipment ;
Radium selective complexer ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A radium removal treatment plant was constructed for the small community of Redhill Forest in the central mountains of Colorado. The plant consists of iron removal using oxidation, filtration, and settling; radium and hardness removal using ion exchange; and radium removal from the waste brine using Dow Chemical Company's Radium Selective Complexer (RSC). The raw water comes from deep wells and has naturally occuring radium and iron concentrations of about 30-40 pC/L and 7-10 mg/L, respectively, and is aerated before entering the main treatment plant to remove radon gas and carbon dioxide. A unique feature of the plant is the process that removes radium from the waste brine. The process removes only radium from the spent ion exchange regeneration water by permanently complexing the radium on the RSC. The RSC is replaced when exhausted and sent to a final disposal site that is acceptable to state regulatory agencies. The overall plant reduces radium from about 35 pCi/L to less than 4 pCi/L. The RSC system has consistently removed over 99 percent of the radium from the spent ion exchange regenerant. The average inflow radium concentration to the RSC was about 1,180 pCi/L and the average effluent was about 9 pCi/L.