Study of natural radionuclides in Karun river region

Faghihian, Hossein; Rahi, D.; Mostajaboddavati, Mojtaba

doi:10.1007/s10967-011-1496-x

Cited by 16 publications

(3 citation statements)

References 15 publications

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“…The extensive application of nuclear fission technology will inevitably produce waste. − This waste is known as “nuclear waste” or “radioactive waste”. Uranium-containing wastewater (UCW) is one of them. − UCW is highly migratory and biological toxicity. , So far, several types of technologies have been applied to effectively dispose of UCW, including ion exchange, , adsorption, − membrane filtration, , solid-phase extraction, , chemical precipitation, , bioreductive adsorption processes, , and so on. Among the various available techniques, adsorption processes have gained significant popularity in the treatment of uranium in aqueous solutions .…”

Section: Introductionmentioning

confidence: 99%

“…4−6 UCW is highly migratory and biological toxicity. 7,8 So far, several types of technologies have been applied to effectively dispose of UCW, including ion exchange, 9,10 adsorption, 10−12 membrane filtration, 13,14 solidphase extraction, 15,16 chemical precipitation, 17,18 bioreductive adsorption processes, 4,19 and so on. Among the various available techniques, adsorption processes have gained significant popularity in the treatment of uranium in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Properties of Wasteforms after Direct Involvement of Uranium-Containing Silica Gel in Glass Network Formation

Qiu,

Cheng,

et al. 2024

Inorg. Chem.

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Uranium-containing silica gel (UCSG) is a secondary waste generated during the advanced treatment of nuclear wastewater. In order to reduce the growing storage pressure for UCSG, from the perspective of building a borosilicate glass network, UCSG was used to replace SiO 2 in the glass-cured formula to directly achieve the immobilization of UCSG. SEM-EDS results showed that uranium was uniformly distributed in the matrix, and the maximum solid solubility of UCSG (two components: silica gel and uranyl ions) in the formula was as high as 55 wt %. At the same time, TG-MS proved that silica gel lost OH groups (down about 4.61 wt %) and formed Si-O-Si bond by condensation. FT-IR and XPS proved a change in the number of Si-O-Si bond, and new Si-O-B and Si-O-Al bond appeared on the spectrum. This was evidence that silica gel could self-involved participate in the construction of glass networks. EPR analysis obtained the changes in the coordination environment of U atom, the U atom decreased spin electrons number in the glass than in uranyl crystals. The glass also has good physical properties (hardness: 6.51 ± 0.23 GPa; density: 2.3977 ± 0.0056 g/cm 3 ) and chemical durability (normalized leaching rate: LR U = 2.34 × 10 −4 ± 2.05 × 10 −6 g•m 2 •days −1 after 42 days), this research provided tactics for simple treatment of uranium-containing silica gel in one step.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Properties of Wasteforms after Direct Involvement of Uranium-Containing Silica Gel in Glass Network Formation

Qiu,

Cheng,

et al. 2024

Inorg. Chem.

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“…where N, t, m, p and ϵ (E) are net area counts, time, intensity, weight of sample and absolute photopeak efficiency at specific energy, respectively [ 11 ]. The specific activity of 226 Ra was evaluated from gamma-ray lines of 214 Bi at 609.3, 1120.3 and 1764.5keV and 214 Pb at 295 and 351keV, while the specific activity of 232 Th was evaluated from gamma-ray lines of 228 Ac at 338.4, 911.1 and 968.9keV.…”

Section: Introductionmentioning

confidence: 99%

226Ra, 232Th and 40K contents in water samples in part of central deserts in Iran and their potential radiological risk to human population

Ehsanpour

Abdi

Mostajaboddavati

et al. 2014

J Environ Health Sci Engineer

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BackgroundThe radiological quality of 226Ra, 232Th and 40K in some samples of water resources collected in Anarak-Khour a desertic area, Iran has been measured by direct gamma ray spectroscopy using high purity germanium detector in this paper.ResultThe concentration ranged from ≤0.5 to 9701 mBq/L for 226Ra; ≤0.2 to 28215 mBq/L for 232Th and < MDA to 10332 mBq/L for 40K. The radium equivalent activity was well below the defined limit of 370Bq/L. The calculated external hazard indices were found to be less than 1 which shows a low dose.ConclusionThese results can be contributed to the database of this area because it may be used as disposal sites of nuclear waste in future.

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