Plutonium and americium in sediment samples along the Romanian sector of the Danube river and the Black Sea coast

Mihai, S. A.; Hurtgen, C.

doi:10.1007/bf02034286

Cited by 6 publications

(3 citation statements)

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“…The chemical yields of plutonium and americium determined from the recovery of the 242pu and 243Am tracers by alpha-spectrometry are between 70%-86% for plutonium and around 70% for americium, bigger than the ones obtained by the previous procedure. 2 The radionuclide concentrations in the investigated sediment samples dissolved by microwave digestion which left apart the undissolved silicates and by alkaline fusion which is a total dissolution do not indicate noticeable differences. This proves that the measured radionuclides are not associated with the refractory part of the samples and even if there is such an association its contribution to the contamination can be neglected.…”

Section: Resultsmentioning

confidence: 94%

Artificial radioactive contamination of sediments along the Romanian sector of the Danube river and the Black Sea coast

Mihai¹,

Hurtgen²,

Georgescu³

1999

J Radioanal Nucl Chem

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The concentrations of 9~ 23Spu, 239'24~ and 24lAin were determined in 12 sediment samples, collected from the bed of the Romanian sector of the Danube river and the Black Sea coast during 1996-1997. The samples were dissolved using a microwave digestion technique which left the refractory part of the samples undissolved. Part of the samples were also dissolved totally by alkaline fusion. The results obtained after radiochemical separations and measurement of the radionuclides by the two dissolution methods were compared recommending the optimum method. The radioactive contamination of the investigated sector in 1996-1997 is compared with the results obtained for the same locations in 1994-1995 reported in previous papers.

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Section: Resultsmentioning

confidence: 94%

Artificial radioactive contamination of sediments along the Romanian sector of the Danube river and the Black Sea coast

Mihai¹,

Hurtgen²,

Georgescu³

1999

J Radioanal Nucl Chem

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“…Table 2 summarizes the distributions of 241 Am in some specific samples from different locations. Northwest Pacific Ocean bottom sediments 0.44-10 Bq/kg [32] Aegean Turkish coast marine sediment 0.003-0.33 Bq/kg [33] Black Sea coast sediment 0.043-0.187 Bq/kg [34] Irish Sea sediment 2.61-1894 Bq/kg [35] Ligurian Sea sediment 0.09-0.14 Bq/kg [36] 241 Am is one of the most toxic transuranic nuclides due to its long half-life, α-particle emission, and especially its tendency to deposit in several key tissues and organs, such as the skeleton and liver, if it enters the human body. 241 Am in the environment can be transferred into the human body through drinking water and the food chain.…”

Section: Distribution and Transfer Of 241 Am In The Environmentmentioning

confidence: 99%

Determination of 241Am in Environmental Samples: A Review

et al. 2022

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The determination of 241Am in the environment is of importance in monitoring its release and assessing its environmental impact and radiological risk. This paper aims to give an overview about the recent developments and the state-of-art analytical methods for 241Am determination in environmental samples. Thorough discussions are given in this paper covering a wide range of aspects, including sample pre-treatment and pre-concentration methods, chemical separation techniques, source preparation, radiometric and mass spectrometric measurement techniques, speciation analyses, and tracer applications. The paper focuses on some hyphenated separation methods based on different chromatographic resins, which have been developed to achieve high analytical efficiency and sample throughput for the determination of 241Am. The performances of different radiometric and mass spectrometric measurement techniques for 241Am are evaluated and compared. Tracer applications of 241Am in the environment, including speciation analyses of 241Am, and applications in nuclear forensics are also discussed.

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“…5 The sample dissolution was done in two different ways. One relies on a microwave digestion technique, while the other is an alkaline fusion followed by dissolution in hydrochloric acid.…”

Section: Determination Of 226ra U Th Pu and Am Andotopesmentioning

confidence: 99%

Radioactive accumulation in alga samples from Romanian Black Sea coast

Mihai

Hurtgen

Georgescu

1999

J Radioanal Nucl Chem

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The natural and artificial radioactivity of the brown alga Cystoseira barbata samples collected on the Romanian Black Sea coast in 1996 is reported. The results on 137Cs were obtained through gamma-spectrometry, on 9~ by beta-counting of the 90y oxalate precipitated after strontium separation, on 226Ra by the emanation method, while the concentrations of U, Th, Pu and Am isotopes were obtained through radiochemical separations using tracers followed by alpha-spectrometry counting of the stainless steel discs after electrodeposition. These results add further evidence that Cystoseira barbata may be used as a bioindicator for radioactive contamination of the coastal waters.

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Plutonium and americium in sediment samples along the Romanian sector of the Danube river and the Black Sea coast

Cited by 6 publications

References 1 publication

Artificial radioactive contamination of sediments along the Romanian sector of the Danube river and the Black Sea coast

Artificial radioactive contamination of sediments along the Romanian sector of the Danube river and the Black Sea coast

Determination of 241Am in Environmental Samples: A Review

Radioactive accumulation in alga samples from Romanian Black Sea coast

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