Two processes for decontamination of radioactive aqueous wastes by precipitation and coagulation

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dc.contributor.authorFrost, CRen_AU
dc.date.accessioned2007-11-22T04:14:12Zen_AU
dc.date.accessioned2010-04-30T04:32:10Zen_AU
dc.date.available2007-11-22T04:14:12Zen_AU
dc.date.available2010-04-30T04:32:10Zen_AU
dc.date.issued1961-08en_AU
dc.description.abstractIn an investigation of the efficiency of the calcium/ferric phosphate process for removal of various radio-isotopes from solution using a sludge blanket clarifier 70 per cent, removal of uranyl and strontium ions and mixed fission products was achieved but cesium removal was poor, in agreement with other workers. Dosing ion concentrations were 80 p.p.m. PO4---, 50 p.p.m. Ca++ and 40 p.p.m. Fe+++, used at an initial pH of 11.5. Use of a lower concentration and lower pH values did not materially affect removals. In batch experiments to find the optimum concentration of ions for precipitation at a pH of 9.5 it was found that concentrationsof 90 p.p.m. PO4---, 50 p.p.m. Ca++ and 40 p.p.m. Fe+++ leave very small residual concentrations in the supernate. Removals of radio-isotopes from solution by precipitation using the aluminium hydroxide process are comparable with those in the calcium/ferric phosphate process, except for that of strontium. It is recommended that 8.0 be used as the maximum pH for the precipitation of aluminium hydroxide in the sludge blanket clarifier. Thickening experiments with a sludge blanket clarifier using both processes show that the degree of thickening is governed by the size and relative proportions of the clarifier.en_AU
dc.identifier.citationFrost, C. R. (1961). Two processes for decontamination of radioactive aqueous wastes by precipitation and coagulation (AAEC/E75). Lucas Heights, NSW: Research Establishment, Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc328en_AU
dc.identifier.otherAAEC-E-75en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/179en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectRadioactive effluentsen_AU
dc.subjectDecontaminationen_AU
dc.subjectPrecipitationen_AU
dc.subjectRadioisotopesen_AU
dc.subjectRadioactivityen_AU
dc.titleTwo processes for decontamination of radioactive aqueous wastes by precipitation and coagulationen_AU
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