slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Determination of technetium-99 from model and rad-waste samples PowerPoint Presentation
Download Presentation
Determination of technetium-99 from model and rad-waste samples

Loading in 2 Seconds...

play fullscreen
1 / 13

Determination of technetium-99 from model and rad-waste samples - PowerPoint PPT Presentation


  • 115 Views
  • Uploaded on

Determination of technetium-99 from model and rad-waste samples. Martina Ferenco vá, Peter Tkáč Department of Nuclear Chemistry, Faculty of Natural Sciences,. Comenius University, Bratislava, Slovakia. LiquiScint 2004 , LSC in Radiochemistry and Environmental Sciences , Prague, 17-18th May.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Determination of technetium-99 from model and rad-waste samples' - kenyon-mccarty


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Determination of technetium-99 from model and rad-waste samples

Martina Ferencová, Peter Tkáč

Department of Nuclear Chemistry, Faculty of Natural Sciences,

Comenius University, Bratislava, Slovakia

slide2

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

  • Aims of the work
  • Find out fast and suitable separation technique
  • Define percentage yield after each separation step
  • Study the separation of technetium from model samples
  • Study the separation of technetium from real rad-waste samples
  • Compare this separation method with commercial TEVA resin

TM

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide3

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Separation scheme

sample

leaching

precipitation

anex separation

extraction

measuring

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide4

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Leaching solution

Average yield

8 M HNO3→ 80.7 %

2 M H2SO4 → 75.8 %

2 M H2SO4 + pers. → 77.5 %

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide5

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Precipitation of Fe3+ ions

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide6

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Extraction with TPACl

1M H2SO4

1M NH4OH

2M NH4OH

1M Na2CO3

2M Na2CO3

H2O

0.05M NaNO3

0.01M NaNO3

0.5M H2SO4

0.01M HNO3

0.05M HNO3

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide7

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Yields of 99mTc from soil model samples after each separation step, with 8 M HNO3 used as leaching acid

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide8

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Cs-137 decontamination after each separation step

Yields of Tc after each separation step

Activity of Tc-99 added at start of separation procedure was 0.81 ± 0.031 Bq

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide9

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Real sample 1: concentrate solution

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide10

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Real sample 2: building debris

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide11

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Real sample 3: scraped dye

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide12

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

CONCLUSION

  • was designed the separation method for determination of Tc-99 from solid and liquid

samples

  • was determined the separation yield after each separation step
  • was verified the availability of prepared method for determination of Tc-99
  • was compared values of 99Tc determined by our separation procedure and by

commercial sorbent TEVA resin

Ferencová M., Tkáč P., Determination of technetium-99 from model and rad-waste samples

slide13

LiquiScint 2004, LSC in Radiochemistry and Environmental Sciences, Prague, 17-18th May

Thank you for your attention ;-)