Strontium removal from aqueous media by natural and modified sorbents

Bochkarev, G. R.; Pushkareva, G. I.

doi:10.1007/s10913-009-0036-3

Cited by 20 publications

(17 citation statements)

References 2 publications

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“…Strontium uptake by naturally occurring and thermally modified brucite has been investigated and high sorption capacity and relatively fast kinetics have been reported, particularly at alkaline pH [12]. Parry et al studied plutonium behaviour in a model Magnox storage pond liquor containing Pu(IV), corroded Magnox sludge (CMS) simulant, sodium carbonate, polyelectrolyte, and silica [17].…”

Section: Introductionmentioning

confidence: 99%

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Maher

Ivanov

O’Brien

et al. 2016

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Maher

Ivanov

O’Brien

et al. 2016

Journal of Nuclear Materials

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“…Over a period of decades magnox fuel cladding corrodes to produce the mineral brucite Mg(OH) 2 , which has a hydroxide-terminated reactive surface which readily adsorbs both strontium and some actinides. [1,2] The understanding of the relative energetics of the surface-complexed and aqueous hydrated species is therefore key when forming strategies for the continued storage and immobilisation of radionuclides in the waste, particularly since some of these storage ponds are nearing the end of their operational lifetimes.…”

Section: Introductionmentioning

confidence: 99%

Quantum Chemical Studies of the Hydration of Sr²⁺ in Vacuum and Aqueous Solution

Kerridge

Kaltsoyannis

2011

Chemistry A European J

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The geometric structures of gas-phase Sr(2+) hydrates are calculated quantum chemically by using hybrid (B3LYP) and meta-GGA (TPSS) density functional theory, and a range of thermodynamic data (including sequential bond enthalpies, entropies and free energies for the reactions Sr(2+)(H(2)O)(n-1)+H(2)O→Sr(2+)(H(2)O)(n)) are shown to be in excellent agreement with experiment. When the number of coordinating water molecules exceeds six, such that water begins to occupy the second solvation shell, it is found that detailed analysis based on both geometrical and conformational entropy is required in order to confidently identify the experimentally observed structures. The significant increase in coordination number observed experimentally between the gas- and aqueous-phase species is successfully reproduced, as is the first solvation shell geometry. Inaccurate second shell geometries imply that larger model systems may be required to achieve agreement with experiment. Candidate species for on-going computational studies of the interaction of hydrated Sr(2+) with brucite surfaces have been identified.

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“…As was reported by Bochkarev and Pushkareva, thermal modification of natural brucite (400-600 E) produces a new crystalline phase, i.e., periclase MgO, enhancing the brucite adsorbing capacity. [21,22] Therefore it seemed of interest to look into processes occurring between a thermally activated sorbent and solutions. Figure 5b illustrates a relationship between the copper, iron and nickel extraction and interaction time with a sorbent activated at 400-600 E. The behaviour patterns are evidently different.…”

Section: Geochemical Barriers Based On Products Of Chemical Processinmentioning

confidence: 99%

Geochemical barriers for environment protection and recovery of nonferrous metals

Chanturia

Маслобоев

Макаров

et al. 2014

Journal of Environmental Science and Health, Part A

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A study of natural minerals, ore tailings and their products as materials for artificial geochemical barriers is presented. In particular, it focuses on interaction between calcite and dolomite and sulfate solutions containing nickel, copper and iron under static conditions. Calcite of -0.1 mm fraction has been shown to perform well as a barrier when added to water phases of tailing dumps and natural reservoirs. Experiments under dynamic conditions have revealed a high potential of thermally activated copper-nickel tailings as barriers. After a 500-day precipitating period on a geochemical barrier, the contents of nickel and copper in ore dressing tailings were found to increase 12- and 28-fold, respectively. An effective sorbent of copper, iron and nickel ions is a brucite-based product of hydrochloric acid treatment of vermiculite ore tailings. Its sorption capacity can be essentially increased through thermal activation.

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Strontium removal from aqueous media by natural and modified sorbents

Cited by 20 publications

References 2 publications

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Quantum Chemical Studies of the Hydration of Sr²⁺ in Vacuum and Aqueous Solution

Geochemical barriers for environment protection and recovery of nonferrous metals

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Strontium removal from aqueous media by natural and modified sorbents

Cited by 20 publications

References 2 publications

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Americium and plutonium association with magnesium hydroxide colloids in alkaline nuclear industry process environments

Quantum Chemical Studies of the Hydration of Sr2+ in Vacuum and Aqueous Solution

Geochemical barriers for environment protection and recovery of nonferrous metals

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Product

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Quantum Chemical Studies of the Hydration of Sr²⁺ in Vacuum and Aqueous Solution