Radium-226 removal from a uranium mill effluent—physical/chemical treatment process development studies

CIM Bulletin, Vol. 73, No. 819, 1980

D. MOFFETT, Rio Algom Limited, L. WHITTLE and D. AVERILL, Wastewater Technology Centre, Environment Canada, G. KASSAKHIAN Eldorado Nuclear Limited, R. WEBBER Denison Mines Limited

This paper describes the recent pilot-plant work carried out on two alternative processes capable of producing an effluent containing less than 10 pCi/L total radium-226 activity and very close to 3 pd/L dissolved radium-226. The processes incorporate coprecipitation of radium with barium sulphate by the addition of barium chloride in continuously stirred tank reactors followed by either chemical coagulation with ferric chloride, flocculation and clarification, or polymer-aided dual-media filtration.
Keywords: Hydrometallurgy, Radium, Uranium mill effluents, Environmental control, Tailings ponds, Barium chloride, Quirke mine, Precipitation, Flocculation, Clarification, Sand filters.