Association of radionuclides with colloids in soil solutions

Goryachenkova, T. A.; Kazinskaya, I. E.; Kuzovkina, E. V.; Новиков, А. П.; Myasoedov, Β. F.

doi:10.1134/s1066362209020209

Cited by 9 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…46 241 Am activity in this area is significantly correlated with clay, silt, and sand (Table 2). Goryachenkova et al 47 found that in aqueous extracts, Pu and Am were retained by particles of various sizes. Sediments in estuary and coastal areas are dominated by silt and clay with smaller particle sizes.…”

Section: Resultsmentioning

confidence: 99%

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

Han

Zhu

et al. 2021

ACS Omega

View full text Add to dashboard Cite

During the global nuclear weapon tests, large amounts of radioactive elements are released into the environment. Long-period actinide elements such as Np, Pu, and Am exhibit different behaviors in various environments, and their isotope characteristic fingerprints are of great significance for studying the distribution, migration, and prediction of radioactive pollutants. To investigate the distribution of 241 Am and 237 Np in southern China, activities of 241 Am (0.008 ± 0.012−0.932 ± 0.066 Bq/kg) and 237 Np (0.037 ± 0.003−1.458 ± 0.063 mBq/kg), 237 Np/ 239 Pu atom ratios (0.055 ± 0.003−0.864 ± 0.054), and 241 Am/ 239+240 Pu activity ratios (0.033 ± 0.075−15.870 ± 0.477) in 95 surface sediment samples collected from the northern South China Sea and major river basins were analyzed for the first time. Due to the different scavenging mechanisms of Am and Pu, 241 Am is preferentially concentrated by sinking the particulate, while plutonium is scavenged in the coastal area, resulting in a higher 241 Am/ 239+240 Pu activity ratio in estuary and coastal areas. The distribution of 237 Np shows obvious spatial inhomogeneity as the high migration rate. The relevant fingerprint characteristic has changed greatly and needs to be updated urgently. As a result of the convergence of land and sea, 241 Am, 239,240 Pu, and 237 Np are dominated by terrestrial sediments and deposited in the coastal area of southern China, which should be paid more attention to. This work can establish China's current neptunium radioactivity database, and the difference in Np, Pu, and Am scavenging processes may be a powerful tool for evaluating the impact of the Pearl River Estuary salt tide.

show abstract

Section: Resultsmentioning

confidence: 99%

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

Han

Zhu

et al. 2021

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Previously we studied the distribution of radionuclides between various groups of soil OM: decalcinate (mixture of nonspecific substances and the most soluble FAs), FA fractions, HA fractions, and insoluble residue (humate and mineral fraction) [5]. In particular, it was shown that Am in the majority of soils is mainly associated with decalcinate and Pu, with the least soluble HA fractions.…”

mentioning

confidence: 99%

“…In this study we examined the distribution of Pu and Am between specific and nonspecific components of the decalcinate and FA group [5]. The main objectives of the study were determination of the content of the most soluble forms of these radionuclides and evaluation of the efficiency of their sorption on carbon nanotubes as the simplest model of natural geochemical barriers.…”

mentioning

confidence: 99%

Association of radionuclides with components of fulvic acids isolated from soils

et al. 2012

Self Cite

View full text Add to dashboard Cite

The distribution of Pu and Am between specific and nonspecific components of various groups of the organic matter of soil was studied. For chernozem and soddy podzolic soil, 63 and 53% of Pu and only 1 and 8% of Am, respectively, are bound with fulvic acid purified to remove low-molecular-weight compounds by fractionation on BAU activated charcoal. Larger relative amount of Am, compared to Pu, in the form of low-molecular-weight nonspecific compounds is responsible for higher migration mobility of Am, compared to Pu, in the environment. The sorption of organic complexes of Pu and Am on carbon nanotubes was studied. The degree of Pu sorption only slightly depends on the nature of the organic substance, except solutions of humic acids from which the Pu sorption is appreciably higher. The degree of Am sorption regularly increases with a decrease in the molecular weight of the organic substances.

show abstract

Mobility and Bioavailability of Radionuclides in Soils

Iurian

Phaneuf

Mabit

2015

Radionuclides in the Environment

View full text Add to dashboard Cite

Association of radionuclides with colloids in soil solutions

Cited by 9 publications

References 5 publications

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

Association of radionuclides with components of fulvic acids isolated from soils

Mobility and Bioavailability of Radionuclides in Soils

Contact Info

Product

Resources

About

Association of radionuclides with colloids in soil solutions

Cited by 9 publications

References 5 publications

237Np and 241Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

237Np and 241Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

Association of radionuclides with components of fulvic acids isolated from soils

Mobility and Bioavailability of Radionuclides in Soils

Contact Info

Product

Resources

About

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective

²³⁷Np and ²⁴¹Am as Fingerprints in the Major River Basins of Southern China and North South China Sea: A Land–Sea Perspective