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Moreno, H.; Absi, A.; Vioque, I.; Manjón, G.; Garcı́a-Tenorio, R.

doi:10.1023/a:1006706320580

Cited by 26 publications

(2 citation statements)

References 7 publications

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“…This by-product is enriched in natural radionuclides of the 238U series [1], producing an unambiguous radioactive impact in the zone as demonstrated in previous works [2,3]. In fact, specific activities of 226Ra and U-isotopes in sediments of the fiver are distinctly greater than reference levels found in non-perturbed Spanish soils [4].…”

Section: Introductionmentioning

confidence: 59%

A sequential extraction procedure to determine Ra and U isotopes by alpha-particle spectrometry in selective leachates

et al. 2003

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A radiochemical sequential extraction procedure has been developed in our laboratory to determine 226Ra and 234, 238 U by a-particle spectrometry in environmental samples. This method has been validated for both radionuclides by comparing in selected samples the values obtained through its application with the results obtained by applying alternative procedures. Recoveries obtained, counting periods applied and background levels found in the alpha spectra give suitable detection limits to allow the Ra and U determination in operational forms defined in riverbed contaminated sediments. Results obtained in these speciation studies show that 226Ra and 234, 238 U contamination tend to be associated to precipitated forms of the sediments.

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Section: Introductionmentioning

confidence: 59%

A sequential extraction procedure to determine Ra and U isotopes by alpha-particle spectrometry in selective leachates

et al. 2003

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“…The radionuclides of 226 Ra and 228 Ra can be measured in environmental samples using a range of techniques with offers a number of advantages such as time saving and simplicity [21]. Through LSC methods also, radium in mineral waters [22], contaminated rivers [8] and phosphogypsum samples [23] can be measured. The aim of the study is to develop a simple method for determination of 226 Ra and 228 Ra in environmental samples using the α-β coincidence LSC.…”

Section: Introductionmentioning

confidence: 99%

Application of in-house method for determinationof radium isotopes in environmental samples usingthe Liquid Scintillation counting technique

Ariffin¹,

Mahmood²,

Mohamed³

2011

JASMI

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A method for determination of 226 Ra and 228 Ra in environmental samples using the α-β coincidence liquid scintillation counting (LSC) has been developed. Radium were preconcentrated from environmental samples by coprecipitation with BaSO 4 , then purified from others radionuclide interferences using the cation column exchange (Bio-Rad AG 50 W-X4 resin with 200 -400 mesh size and H + form) and operating in warm temperature which is between 70˚C -80˚C. Then, the Ba(Ra)SO 4 precipitate was filtered through the Millipore filter paper, dried and weighed to calculate chemical yield. The activity concentration of radium isotopes in mixture of liquid scintillation cocktails were measured using LSC after being stored for over 21 days to allow the growth of the progeny nuclides. The method has been validated with a certified reference material supplied by the International Atomic Energy Agency and reliable results were obtained. The radiochemical yields for radium were 59% -90% and recovery was 97% and 80% for 226 Ra and 228 Ra, respectively. Sixteen seawater and fish flesh samples collected in Kapar coastal water have been analyzed with the developed method. The obtained radium activity concentrations in seawater were in the range of 2.08 ± 0.82 mBq/L to 3.69 ± 1.29 mBq/L for 226 Ra and 6.01 ± 3.05 mBq/L to 17.07 ± 6.62 mBq/L for 228 Ra. Meanwhile, the activity concentrations of 226 Ra and 228 Ra in fish flesh were in the range of 11.82 ± 5. Bq/kg dry wt., respectively.

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Solidification of hot real radioactive liquid scintillator waste using cement–clay composite

2013

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Cited by 26 publications

References 7 publications

A sequential extraction procedure to determine Ra and U isotopes by alpha-particle spectrometry in selective leachates

A sequential extraction procedure to determine Ra and U isotopes by alpha-particle spectrometry in selective leachates

Application of in-house method for determinationof radium isotopes in environmental samples usingthe Liquid Scintillation counting technique

Solidification of hot real radioactive liquid scintillator waste using cement–clay composite

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