Covalent Organic Frameworks(COFs) for Sequestration of 99TCO4−

Di, Zhengyi; Mao, Yi-Ning; Yuan, Hong; Zhou, Yan; Jin, Jun; Li, Cheng‐Peng

doi:10.1007/s40242-022-1447-9

Cited by 11 publications

(5 citation statements)

References 40 publications

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“…Thereby, the elimination of radionuclides is significant for environment protection and public human safety. Di et al (2022) reviewed the removal of 99 TcO 4 − by COFs as adsorbents from solutions, and found that COFs were suitable materials for 99 TcO 4 − removal from aqueous solutions with high stability and selectivity. Hao et al (2022a) synthesized ionic COFs, which had high − from aqueous solutions.…”

Section: Radionuclide Pollution Treatmentmentioning

confidence: 99%

Application of covalent organic frameworks and metal–organic frameworks nanomaterials in organic/inorganic pollutants removal from solutions through sorption-catalysis strategies

et al. 2023

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With the fast development of agriculture, industrialization and urbanization, large amounts of different (in)organic pollutants are inevitably discharged into the ecosystems. The efficient decontamination of the (in)organic contaminants is crucial to human health and ecosystem pollution remediation. Covalent organic frameworks (COFs) and metal–organic frameworks (MOFs) have attracted multidisciplinary research interests because of their outstanding physicochemical properties like high stability, large surface areas, high sorption capacity or catalytic activity. In this review, we summarized the recent works about the elimination/extraction of organic pollutants, heavy metal ions, and radionuclides by MOFs and COFs nanomaterials through the sorption-catalytic degradation for organic chemicals and sorption-catalytic reduction-precipitation-extraction for metals or radionuclides. The interactions between the (in)organic pollutants and COFs/MOFs nanomaterials at the molecular level were discussed from the density functional theory calculation and spectroscopy analysis. The sorption of organic chemicals was mainly dominated by electrostatic attraction, π-π interaction, surface complexation and H-bonding interaction, whereas the sorption of radionuclides and metal ions was mainly attributed to surface complexation, ion exchange, reduction and incorporation reactions. The porous structures, surface functional groups, and active sites were important for the sorption ability and selectivity. The doping or co-doping of metal/nonmetal, or the incorporation with other materials could change the visible light harvest and the generation/separation of electrons/holes (e−/h+) pairs, thereby enhanced the photocatalytic activity. The challenges for the possible application of COFs/MOFs nanomaterials in the elimination of pollutants from water were described in the end.

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Section: Radionuclide Pollution Treatmentmentioning

confidence: 99%

Application of covalent organic frameworks and metal–organic frameworks nanomaterials in organic/inorganic pollutants removal from solutions through sorption-catalysis strategies

et al. 2023

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“…Cationic polymeric nanotraps (CPNs), a subclass of porous organic polymers (POPs), are constructed by utilizing cationic organic building blocks through covalent bonds or postsynthesis functionalization of a neutral POP material with cationic groups. With their cationic framework, high surface area, and customizable structures and functions, CPNs are highly regarded as an excellent platform for efficiently adsorbing 99 TcO 4 – /ReO 4 – (the nonradiative surrogate of 99 TcO 4 – ) from wastewater. − The CPNs constructed from imidazolium-based organic building units show excellent selective adsorption performance toward 99 TcO 4 – /ReO 4 – . ,,, However, imidazolium moieties are inherently unstable in highly alkaline conditions. In alkaline environments, OH – as a nucleophilic reagent preferentially attacks the C2 position of imidazolium ions, leading to the degradation of the imidazolium ring. − This drawback directly affects the adsorption of 99 TcO 4 – /ReO 4 – by imidazolium-based CPNs under alkaline conditions.…”

Section: Introductionmentioning

confidence: 99%

Creation of Cationic Polymeric Nanotrap Featuring High Anion Density and Exceptional Alkaline Stability for Highly Efficient Pertechnetate Removal from Nuclear Waste Streams

Wang,

Li,

Huang

et al. 2024

ACS Cent. Sci.

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There is an urgent need for highly efficient sorbents capable of selectively removing 99 TcO 4 − from concentrated alkaline nuclear wastes, which has long been a significant challenge. In this study, we present the design and synthesis of a highperformance adsorbent, CPN-3 (CPN denotes cationic polymeric nanotrap), which achieves excellent 99 TcO 4 − capture under strong alkaline conditions by incorporating branched alkyl chains on the N3 position of imidazolium units and optimizing the framework anion density within the pores of a cationic polymeric nanotrap. CPN-3 features exceptional stability in harsh alkaline and radioactive environments as well as exhibits fast kinetics, high adsorption capacity, and outstanding selectivity with full reusability and great potential for the cost-effective removal of 99 TcO 4 − /ReO 4 − from contaminated water. Notably, CPN-3 marks a record-high adsorption capacity of 1052 mg/g for ReO 4− after treatment with 1 M NaOH aqueous solutions for 24 h and demonstrates a rapid removal rate for 99 TcO 4 − from simulated Hanford and Savannah River Site waste streams. The mechanisms for the superior alkaline stability and 99 TcO 4 − capture performances of CPN-3 are investigated through combined experimental and computational studies. This work suggests an alternative perspective for designing functional materials to address nuclear waste management.

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“…The report published by the International Atomic Energy Agency, titled “International Status and Prospects for Nuclear Power 2021,” discloses that by the close of 2020, the world was powered by 441 operational nuclear power units. Together, this vast network denoted a total installed power capacity of close to 392 gigawatt-electric (GWe), contributing to around 15% of the world’s total power generation. − Moreover, these power plants create approximately 10,000 tons of spent nuclear fuel each year. However, along with the opportunities nuclear energy presents, there also exist numerous environmental and safety concerns necessitating our attention.…”

Section: Introductionmentioning

confidence: 99%

“…96 Ghosh described the synthesis of two imidazolium-functionalized ionic porous polymers, iPOP-3 and iPOP-4. These were created by a quaternization reaction between tris(4-bromomethylphenyl) [1,3,5] (TPEPE) and BBB, exhibiting an impressive ReO 4 − adsorption capacity of 813 mg g −1 , emphasizing its potential for contamination clean-up applications (Figure 16a). 99 Wang and their team introduced a straightforward method to create an imidazolium-based cationic polymer, PMV3m-Cl.…”

mentioning

confidence: 99%

Advanced Porous Materials as Designer Platforms for Sequestering Radionuclide Pertechnetate

Xing,

Lai,

Sun

et al. 2024

Chem Bio Eng.

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Technetium-99 ( 99 Tc), predominantly present as pertechnetate ( 99 TcO 4 − ), is a challenging contaminant in nuclear waste from artificial nuclear fission. The selective removal of 99 TcO 4 − from nuclear waste and contaminated groundwater is complex due to (i) the acidic and intricate nature of high-level liquid wastes; (ii) the highly alkaline environment in low-activity level tank wastes, such as those at Hanford, and in high-level wastes at locations like Savannah River; and (iii) the potential for 99 TcO 4− to leak into groundwater, risking severe water pollution due to its high mobility. This Review focuses on recent developments in advanced porous materials, including metal−organic frameworks (MOFs), covalent organic frameworks (COFs), and their amorphous counterparts, porous organic polymers (POPs). These materials have demonstrated exceptional effectiveness in adsorbing 99 TcO 4 − and similar oxyanions. We comprehensively review the adsorption mechanisms of these anions with the adsorbents, employing macroscopic batch/column experiments, microscopic spectroscopic analyses, and theoretical calculations. In conclusion, we present our perspectives on potential future research directions, aiming to overcome current challenges and explore new opportunities in this area. Our goal is to encourage further research into the development of advanced porous materials for efficient 99 TcO 4 − management.

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Covalent Organic Frameworks(COFs) for Sequestration of 99TCO4−

Cited by 11 publications

References 40 publications

Application of covalent organic frameworks and metal–organic frameworks nanomaterials in organic/inorganic pollutants removal from solutions through sorption-catalysis strategies

Application of covalent organic frameworks and metal–organic frameworks nanomaterials in organic/inorganic pollutants removal from solutions through sorption-catalysis strategies

Creation of Cationic Polymeric Nanotrap Featuring High Anion Density and Exceptional Alkaline Stability for Highly Efficient Pertechnetate Removal from Nuclear Waste Streams

Advanced Porous Materials as Designer Platforms for Sequestering Radionuclide Pertechnetate

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