Efficient capture and stable storage of radioactive iodine by bismuth-based ZIF-8 derived carbon materials as adsorbents

Liu, Sheng; Zeng, Yiyang; Li, Jun; Li, Jiamao; Peng, Hao; Xie, Haiyang; Zou, Hao; Xiao, Chengjian; Hua, Xueming; Bao, Jingliang; Liu, Xian; Li, Yuanli; Chi, Fangting

doi:10.1016/j.seppur.2022.122151

Cited by 19 publications

(7 citation statements)

References 44 publications

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“…Traditional industrial technology is to use wet washing and solid adsorption to capture iodine. , In order to avoid the use of highly corrosive solutions, solid adsorption based on porous nanomaterials as adsorbents has lower maintenance costs and is more environmentally friendly and easier to operate. A variety of porous materials have been reported for the adsorption of iodine, including metal–organic frameworks (MOFs), − zeolites, , gels, , and porous organic polymers. , However, few materials are available for efficient adsorption of CH 3 I. Therefore, it is essentially important to develop adsorbents that can effectively capture I 2 and CH 3 I.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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With the rapid development of the nuclear industry, the effective treatment of radioactive iodine has become an urgent and challenging task. In this article, we synthesized a nanoporous nitrogen-rich covalent organic framework (TTA-DMTP-COF) with a specific surface area of up to 2332 m2/g for the adsorption of iodine (I2) and methyl iodide (CH3I). Adsorption experiments showed that TTA-DMTP-COF exhibited effective I2 and CH3I adsorption properties; the maximum adsorption capacity of I2 is as high as 2.59 g·g–1, and the maximum adsorption capacity of CH3I is 1.60 g·g–1. In addition, TTA-DMTP-COF can effectively adsorb iodine from an iodine–cyclohexane solution, and the adsorption amount is as high as 516.46 mg/g. Mechanistic studies have shown that I2 and CH3I enter the nanopores of COF materials and form charge transfer complexes with various functional groups in TTA-DMTP-COF (including imines, triazine moieties, and residual amino groups). The N-methylation reaction specifically binds CH3I to the nucleophilic N site and generates polyiodides during the adsorption process. Our work demonstrates that TTA-DMTP-COF is an excellent candidate material capable of capturing radioactive iodine from air and solution in harsh environments.

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Section: Introductionmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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“…The EDS elemental maps (Figure a-2) indicate that all elements are distributed homogeneously within the sample. However, BiI 3 in its final waste form may not be suitable for permanent geological disposal. ,– Therefore, Bi 2 O 3 powder was added during thermal annealing to produce chemically durable iodine-bearing materials (BiOI). ,,, …”

Section: Resultsmentioning

confidence: 99%

“…20,23−25 Therefore, Bi 2 O 3 powder was added during thermal annealing to produce chemically durable iodine-bearing materials (BiOI). 18,23,24,58 Figure 8a shows a digital image and the Vickers indentation zone of the CS BiOI obtained using a Vickers microindentation tester. For comparison, CS BiI 3 exhibits a relative density of 95.1% and a microhardness value of 0.6 ± 0.1 GPa.…”

Section: Sample Characteristics and Iodine Adsorption Mechanismmentioning

confidence: 99%

Bi⁰–Reduced Graphene Oxide Composites for the Enhanced Capture and Cold Immobilization of Off-Gas Radioactive Iodine

Chee

Lee

et al. 2023

ACS Appl. Mater. Interfaces

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Radioactive waste management is critical for maintaining the sustainability of nuclear fuel cycles. In this study, we propose a novel bismuth-based reduced graphene oxide (Bi0–rGO) composite for the immobilization of off-gas radioactive iodine. This material synthesized via a solvothermal route exhibited a low surface area (2.96 m2/g) combined with a maximum iodine sorption capacity of 1228 ± 25 mg/g at 200 °C. The iodine sorbent was mixed with Bi2O3 powder and distilled water to fabricate waste matrices, which were cold-sintered at 300 °C under a uniaxial pressure of 500 MPa for 20 min to achieve a relative density of ∼98% and Vickers hardness of 1.3 ± 0.1 GPa. The utilized methodology reduced the iodine leaching rate by approximately 3 orders of magnitude through the formation of a chemically durable iodine-bearing waste form (BiOI). This study demonstrates the high potential of Bi0–rGO as an innovative solution for the immobilization of radioactive waste at relatively low temperatures.

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“…Tesfay Reda et al (2022) synthesized Bi 2 O 3 @g–CNN and added pillared interlayered clays (PILC) to increase stability, as shown in Figure 5 . The product, Bi 2 O 3 @g–CNN-PILC, had an iodine capture capacity of 830 ± 44 mg/g at 100°C within 8 h. Liu et al (2022) prepared a bismuth-based porous carbon material (Bi@MVF) by directly carbonizing ZIF-8. Bismuth particles are uniformly embedded and allotted on the porous carbon network, and the capture capacity was up to 1560 mg/g at 120°C for 4 h.…”

Section: Vapor Iodine Capturementioning

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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Efficient capture and stable storage of radioactive iodine by bismuth-based ZIF-8 derived carbon materials as adsorbents

Cited by 19 publications

References 44 publications

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Bi⁰–Reduced Graphene Oxide Composites for the Enhanced Capture and Cold Immobilization of Off-Gas Radioactive Iodine

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

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Efficient capture and stable storage of radioactive iodine by bismuth-based ZIF-8 derived carbon materials as adsorbents

Cited by 19 publications

References 44 publications

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Bi0–Reduced Graphene Oxide Composites for the Enhanced Capture and Cold Immobilization of Off-Gas Radioactive Iodine

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

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Bi⁰–Reduced Graphene Oxide Composites for the Enhanced Capture and Cold Immobilization of Off-Gas Radioactive Iodine