Study of BiPbO2NO3 for I-129 Fixation under Reducing Conditions

Amaya, Takayuki; Mukunoki, Atsushi; Shibuya, M.; Kodama, Hiroshi

doi:10.1557/proc-663-43

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Sorbent materials containing Ag + , Cu + , Bi 3+ , Hg 2+ have been widely used to remove iodide from water by forming low solubility precipitate. − One type of materials subjected to wide investigation is the sliver-containing sorbent. − Ag + -containing compounds (e.g., Ag 2 O and AgCl) have been used to remove iodide from water by forming AgI precipitate. ,, In their study to extract iodide from water using Ag(0)-impregnated active carbon, Hoskins and co-workers hypothesized that Ag was first catalyzed by carbon producing Ag 2 O in the presence of dissolved oxygen, followed by sequestration of iodide in the form AgI . Using nanosilver impregnated mesoporous MCM-41, Karkhanei et al achieved a maximum adsorption capacity of 238.1 mg/g for iodide removal at pH 2 …”

Section: Introductionmentioning

confidence: 99%

Enhanced Iodide Removal from Water by Nano-Silver Modified Anion Exchanger

Wang

Liu

et al. 2018

Ind. Eng. Chem. Res.

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Water contamination by iodide has attracted much public attention in recent years due to its impact on public health. In this work, a novel sorbent Ag-D201 was synthesized by modifying a strong anion exchanger with nanosilver particles for selective iodide removal from water. Batch adsorption tests showed that, at neutral pH, Ag-D201 had a maximum iodide adsorption capacity of 312.5 mg/g. Solution pH had no obvious influence on iodide adsorption by this material in the pH range of 3−8, although further increase in solution pH would cause slight inhibition of iodide removal. Further experiments indicated that the material exhibited improved iodide removal selectivity in the presence of commonly encountered anions SO 4 2− , NO 3 − , HCO 3 − and Cl − compared with its counterpart. At 500 mM chloride concentration (about 0.56 M Cl − in seawater), Ag-D201 still achieved more than half of its capacity as compared to control. A synergistic adsorption mechanism was proposed after analyzing the data from batch experiments and material characterizations using XPS and UV−vis. It was speculated that Ag-D201 synthesized in this study possessed two types of active sites for iodide adsorption, −N + (CH 3 ) 3 functional groups originally from the unmodified strong anion exchanger and the nanosilver particles impregnated in the resin matrix. The −N + (CH 3 ) 3 functional groups served to concentrate iodide from bulk solution to resin pores through electrostatic interaction, and nanosilver particles inside the resin pores attracted the neighboring iodide due to strong nucleophilic interaction between I − and Ag 0 . The appearance of strongly nucleophilic I − on silver surfaces helped to catalyze Ag oxidation by dissolved oxygen in solution, and eventually forming AgI precipitate, causing iodide removal from the system. This material would be potentially useful in treating iodide-contaminated water caused by accidental spills of high salinity water like that from deep geological formations during shale gas extraction.

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Section: Introductionmentioning

confidence: 99%

Enhanced Iodide Removal from Water by Nano-Silver Modified Anion Exchanger

Wang

Liu

et al. 2018

Ind. Eng. Chem. Res.

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“…Another nitrate incorporated bismuth oxide, BiPbO 2 NO 3 (BPN), was developed to remove iodide ions in a solution and fix them in the solidified material BiPbO 2 I (BPI) by the ion exchange reaction (Amaya et al, 2000). An anion exchange capacity of 1.0 mEq/g and a distribution coefficient of larger than 0.1 m 3 /kg were obtained in solution at pH between 9 and 13.…”

Section: Methodsmentioning

confidence: 99%

Recent advances in the removal of radioactive iodine by bismuth-based materials

et al. 2023

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Nowadays, the demand for nuclear power is continue increasing due to its safety, cleanliness, and high economic benefits. Radioactive iodine from nuclear accidents and nuclear waste treatment processes poses a threat to humans and the environment. Therefore, the capture and storage of radioactive iodine are vital. Bismuth-based (Bi-based) materials have drawn much attention as low-toxicity and economical materials for removing and immobilizing iodine. Recent advances in adsorption and immobilization of vapor iodine by the Bi-based materials are discussed in this review, in addition with the removal of iodine from solution. It points out the neglected areas in this research topic and provides suggestions for further development and application of Bi-based materials in the removal of radioactive iodine.

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“…Iodine can rapidly undergo exchange and be incorporated into BiPbO 2 NO 3 materials as a means of I – capture. Amaya et al demonstrated that I – is readily exchanged with NO 3 – in BiPbO 2 NO 3 to produce BiPbO 2 I and investigated the subsequent immobilization of this material in a cement matrix . In low-salinity solutions, only 1% of the iodine was released, but in high-salinity solutions, ∼30% of the iodine was released, suggesting that BiPbO 2 I may be susceptible to ionic substitution.…”

Section: Bismuth-based Materials For Contaminant Remediationmentioning

confidence: 99%

A Review of Bismuth(III)-Based Materials for Remediation of Contaminated Sites

Levitskaia

Qafoku

Bowden

et al. 2022

ACS Earth Space Chem.

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Bismuth(III)-based materials are uniquely suited for in situ subsurface remedy applications, as they offer many beneficial properties, including high affinity for multiple contaminants, low human and environmental toxicity, low cost, and synthetic availability. This review summarizes the current research trends in targeted development of bismuth materials potentially useful for subsurface remedy applications, with an emphasis on recent advances in understanding of relevant structure–property relationships. While various bismuth mineral phases can provide frameworks for contaminant sequestration, layered crystalline arrangements are particularly promising because of their electronic and spatial flexibility and their ability to accommodate a wide range of negatively charged species. This translates into a high uptake capacity for several recalcitrant colocated contaminants found at legacy nuclear processing sites, including technetium-99, iodine-129, hexavalent chromium (chromate), and uranium, and offers the potential for both in situ and ex situ remediation applications. Layered bismuth minerals are found in nature, and knowledge of their structure informs the targeted design and cost-effective synthesis of the structurally preorganized materials from readily available bismuth sources for remedial applications in soil and groundwater. This comprehensive review highlights the structure, synthesis, and environmental chemistry of Bi-based materials, including the interaction between Bi-based materials and key environmental contaminants, to explore their potential use for remediation. Bismuth oxyhydroxides, containing clusters of [Bi6O4(OH)4]6+ and [Bi6O5(OH)3]5+ surrounded by easily exchangeable anions such as nitrate, are versatile and show the greatest potential for environmental remediation applications. Because of their flexible structural arrangement, they have been shown to sequester electronically and sterically different anionic species, including chromate, pertechnetate, iodate, and uranyl carbonate, even when they are present as comingled contaminants in groundwater and pore water containing other competing anions (e.g., nitrate and carbonate) and in contact with subsurface sediments.

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Study of BiPbO2NO3 for I-129 Fixation under Reducing Conditions

Cited by 5 publications

References 5 publications

Enhanced Iodide Removal from Water by Nano-Silver Modified Anion Exchanger

Enhanced Iodide Removal from Water by Nano-Silver Modified Anion Exchanger

Recent advances in the removal of radioactive iodine by bismuth-based materials

A Review of Bismuth(III)-Based Materials for Remediation of Contaminated Sites

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