andotherdisturbingisotopes.Thesecondcolumncontainingextrac-
tion chromatographicresinUTEVAwasusedforeliminationofiron.
Eventually,uraniumwaselutedwith0.02MHClandthealpha
sourcewaspreparedbymeansofelectroplating.Themoredetailed
procedureforuraniumseparationispresentedinWarwick(Warwick
et al.,1999). Thanalphasourcewasmeasuredusinghigh-resolution
alphaspectrometry.
Track-etchdetectorswereusedformeasuringradonactivity
concentration inairofWTPs.TheyareCR-39typedetectorfoilsin
diffusion chamber.Theywereplacedfor3monthsindifferent
WTPbuildingsinordertoobtainmeanradonactivityinrooms,
where waterplantoperatorsspentthemostoftheirworkingtime.
Later on,CR39foilswereetchedin25%NaOH.And finally,the
computer controlledopticalevaluationsystemwhichcountsthe
tracks on the detec tor foil corresponding to concent ration of radon
was used(Fisher etal.,1996).
As it was mentioned previously,in the most cases the sole
applied method for water treatment turned outtobeaeration in
order to precipitate Fe(OH)3 and MnO2, accordingly with the
following chemical reaction:
4Fe2þ þO2þ10H2O-4FeðOHÞ3þ8Hþ
2Mn2þ þO2þ2H2O-2MnO2þ4Hþ
Sludge obtained during aeration and filtration processes
adsorbs radio nuclideson the irsurface and disposed in uncon-
trolled way could poseaserious problem for surrounding environment. In our study we collected sludge sample sandafter drying
they were deter mined by gamma spectrometry . Finally in order to
assess the potentialne gative impac tof that sludge on natural
environmentthe3-stagese quential extraction according to BCR
procedure(Ureetal.,1993) was performed. Scheme of that
procedure is depicted in the figure below(Fig. 2).
andotherdisturbingisotopes.Thesecondcolumncontainingextrac-tion chromatographicresinUTEVAwasusedforeliminationofiron.Eventually,uraniumwaselutedwith0.02MHClandthealphasourcewaspreparedbymeansofelectroplating.ThemoredetailedprocedureforuraniumseparationispresentedinWarwick(Warwicket al.,1999). Thanalphasourcewasmeasuredusinghigh-resolutionalphaspectrometry.Track-etchdetectorswereusedformeasuringradonactivityconcentration inairofWTPs.TheyareCR-39typedetectorfoilsindiffusion chamber.Theywereplacedfor3monthsindifferentWTPbuildingsinordertoobtainmeanradonactivityinrooms,where waterplantoperatorsspentthemostoftheirworkingtime.Later on,CR39foilswereetchedin25%NaOH.And finally,thecomputer controlledopticalevaluationsystemwhichcountsthetracks on the detec tor foil corresponding to concent ration of radonwas used(Fisher etal.,1996).As it was mentioned previously,in the most cases the soleapplied method for water treatment turned outtobeaeration in order to precipitate Fe(OH)3 and MnO2, accordingly with thefollowing chemical reaction:4Fe2þ þO2þ10H2O-4FeðOHÞ3þ8Hþ2Mn2þ þO2þ2H2O-2MnO2þ4HþSludge obtained during aeration and filtration processesadsorbs radio nuclideson the irsurface and disposed in uncon-trolled way could poseaserious problem for surrounding environment. In our study we collected sludge sample sandafter dryingthey were deter mined by gamma spectrometry . Finally in order toassess the potentialne gative impac tof that sludge on naturalenvironmentthe3-stagese quential extraction according to BCRprocedure(Ureetal.,1993) was performed. Scheme of thatprocedure is depicted in the figure below(Fig. 2).
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