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- W565247075 abstract "Technetium, as technetium -99, is present in environmentalwaters as a result of radioactive effluent discharges from nuclearinstallations.It is necessary to be able to measure aqueous technetium levelsif accurate models are to be developed to predict the long term effectsof technetium releases on man. As natural waters contain little-3technetium, less than μg dm-3 ,relatively large samples are required( >500 cm3). A method has been developed in which the technetium inthe sample can be rapidly concentrated onto an anion-exchange columnafter the removal of ruthenium isotopes by a precipitation procedure.Further decontamination is achieved by washing the anion-exchange resinwith sodium hydroxide prior to removing the technetium with sodiumthiocyanate. The bulk of the concentrated technetium (> 75%) can beremoved from the resin into less than 15 cm3of eluent and further concentrationis achieved by extracting the technetium into butan-2-one.The butan-2-one can be evaporated onto a planchette and the technetiumlevels determined by measuring the amount of B-radiation emitted fromthe final concentrate. The method has been shown to be capable ofremoving between ca. 10-15 g and 10 -6 g of technetium from 500 cm 3 ofwater and has been used successfully with samples ranging from naturalwaters to nuclear installation effluent.Technetium in natural waters may be lost from solution onto soilsand this has important consequences if environmental technetium levelsare to be measured. Experiments have been carried out to investigateSome of the factors which influence technetium sorption onto soil andmicrobial action has been shown to play an important role in determiningthe rate at which technetium is lost from solution. Other parametersfound to affect technetium sorption onto soil include the chemical formof the technetium and the type of water used in the experiment." @default.
- W565247075 created "2016-06-24" @default.
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- W565247075 date "1983-01-01" @default.
- W565247075 modified "2023-09-27" @default.
- W565247075 title "Some aspects of the assay of technetium in environmental waters" @default.
- W565247075 hasPublicationYear "1983" @default.
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