Rational design of a cationic polymer network towards record high uptake of 99TcO4− in nuclear waste

Li, Jie; Chen, Long; Shen, Nannan; Xie, Rongzhen; Sheridan, Matthew V.; Chen, Xijian; Sheng, Daopeng; Zhang, Duo; Chai, Zhifang; Wang, Shuao

doi:10.1007/s11426-020-9962-9

Cited by 78 publications

(53 citation statements)

References 46 publications

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“…Recently, cationic organic network materials showed high ReO 4 − uptake capability exceeding PCE fibers, such as TbDa‐COF (952 mg g –1 ), [ 6 ] SCU‐CPN‐1 (999 mg g –1 ), [ 7 ] ImCOP (1162 mg g –1 ), [ 31 ] and SCU‐CPN‐2 (1467 mg g –1 ). [ 18 ] However, compared with powdery cationic organic networks, PCE fibers with membranous engineering form is more suitable for practical application, which is favorable to recycling and can be used in dynamic adsorption. The recycling capacity of PCE fibers was evaluated by using 2 m NaCl as the eluant.…”

Section: Resultsmentioning

confidence: 99%

“…− uptake capability exceeding PCE fibers, such as TbDa-COF (952 mg g -1 ), [6] SCU-CPN-1 (999 mg g -1 ), [7] ImCOP (1162 mg g -1 ), [31] and SCU-CPN-2 (1467 mg g -1 ). [18] However, compared with powdery cationic organic networks, PCE fibers with membranous engineering form is more suitable for practical application, which is favorable to recycling and can be − equilibrium adsorption time and maximum adsorption capacity of various reported adsorbents and their corresponding references are given in Table S3 (Supporting Information).…”

Section: Fibrous Adsorbent Design Preparation and Characterizationmentioning

confidence: 99%

“…In the FT-IR spectrum of PCE fibers after ReO 4 − adsorption (PCE-Re), a new peak at 914 cm -1 corresponding to the ReO stretching vibration appeared (Figure 4a). [18,44] In the elemental mapping images and EDX spectrum, Cl was almost replaced by Re (Figure S15, Supporting Information). After the ReO 4 − adsorbed PCE fibers were regenerated by 2 m NaCl, the FT-IR spectrum of PCE fibers resumed the original curve and the ReO stretching vibration disappeared.…”

Section: /Reo 4 − Removal Mechanism Analysismentioning

confidence: 99%

“…[13][14][15] Recently, advanced porous materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and cationic polymer networks (CPNs) with cationic adsorptive sites have been designed and investigated for 99 TcO 4 − /ReO 4 − removal, which showed high uptake capacity, fast kinetics, and excellent selectivity. [16][17][18] However, the powder form of these materials makes them difficult to be used in practical dynamic separation and also difficult for recycling. Additionally, they also have high preparation cost.…”

Section: Introductionmentioning

confidence: 99%

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Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Zhao

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et al. 2022

Adv Funct Materials

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Removal of radioactive technetium-99 ( 99 TcO 4 − ) from water by effective adsorbents is highly desired but remains a challenge. The currently used resin adsorbents possess several obstacles, such as slow adsorption kinetics and low adsorption capacity. To address these issues, herein a type of fibrous adsorbent with porosity and hyper-branched quaternary ammonium groups, namely porous cationic electrospun fibers (PCE fibers), is successfully prepared. PCE fibers can remove 97% of 99 TcO 4 − within 1 min and the equilibrium time of 99% removal is 20 min. The predicted maximum adsorption capacity toward the surrogate ReO 4 − can reach 826 mg g −1 , which is higher than the state of art anion-exchange resins and most of the other reported adsorbents. Furthermore, PCE fibers have good selectivity for ReO 4 − in the presence of competitive anions, and can retain ReO 4 − uptake under extreme conditions including high acid-base and gamma irradiation. Importantly, PCE fibrous adsorptive membrane is employed for dynamic ReO 4 − removal from simulated Hanford LAW stream with a processing capacity of 600 kg simulated stream per kilogram PCE fibers. The excellent performance highlights the advantages of PCE fibers over traditional resins in technetium removal.

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Section: Resultsmentioning

confidence: 99%

Section: Fibrous Adsorbent Design Preparation and Characterizationmentioning

confidence: 99%

Section: /Reo 4 − Removal Mechanism Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Zhao

Chen

Gao

et al. 2022

Adv Funct Materials

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“…2,3 ) and other oxoanions, have been listed by the Environmental Protection Agency (EPA) as priority pollutants. [4][5][6][7][8][9] More importantly, the decontamination of radioactive anionic pollutants from aqueous systems remains a serious threat to global security. One potentially troublesome radionuclide is technetium-99 ( 99 Tc), the main form of which is pertechnetate, TcO 4 − .…”

Section: Introductionmentioning

confidence: 99%

Selective perrhenate/pertechnetate removal by a MOF-based molecular trap

et al. 2022

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Superhydrophobic Phosphonium Modified Robust 3D Covalent Organic Framework for Preferential Trapping of Charge Dispersed Oxoanionic Pollutants

Wang

Lan

Yang

et al. 2022

Adv Funct Materials

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Charge dispersed and less hydrophilic anionic pollutants are often difficult to be preferentially captured by common cationic framework materials. A gamma radiation modification approach is employed to anchor a superhydrophobic phosphonium‐containing coating on a robust crystalline 3D covalent organic framework (COF). By regulating the surface hydrophobicity, the prepared 3DCOF‐g‐VBPPh3Cl is endowed with a strong affinity for charge dispersed and less hydrophilic oxoanions, such as MnO4−, TcO4− and ReO4−, to surmount the Hofmeister bias, which much favors remediation of oxoanionic pollutants in complex aqueous systems. Batch and column experiments with 3DCOF‐g‐VBPPh3Cl in both tap water and simulated groundwater are performed, and rapid sequestration is achieved with removal efficacy up to 99.995%, record‐high distribution coefficient of 1.0 × 108 mL g−1, and desirable priority over competing anions such as Cl−, SO42−, HCO3−, and NO3−, confirming promise for remediation of charge dispersed anionic pollutants. Theoretical calculations reveal a mechanism of preferential capture based on electrostatic and dispersion interaction between charge dispersed anions and 3DCOF‐g‐VBPPh3Cl that effectively competes with solvation of the aqueous anions.

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Rational design of a cationic polymer network towards record high uptake of 99TcO4− in nuclear waste

Cited by 78 publications

References 46 publications

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Selective perrhenate/pertechnetate removal by a MOF-based molecular trap

Superhydrophobic Phosphonium Modified Robust 3D Covalent Organic Framework for Preferential Trapping of Charge Dispersed Oxoanionic Pollutants

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Rational design of a cationic polymer network towards record high uptake of 99TcO4− in nuclear waste

Cited by 78 publications

References 46 publications

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous 99TcO4− Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous 99TcO4− Uptake

Selective perrhenate/pertechnetate removal by a MOF-based molecular trap

Superhydrophobic Phosphonium Modified Robust 3D Covalent Organic Framework for Preferential Trapping of Charge Dispersed Oxoanionic Pollutants

Contact Info

Product

Resources

About

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake