Separation of Re(VII) from aqueous solution by acetone-enhanced photoreduction: an insight into the role of acetone

Wang, Yi; Wu, Zhihao; Weng, Hanqin; Ding, Xing; Wang, Lan; Li, Fuhai; Wei, Yaxiong; Cheng, Sheng; Yamashita, Seizo; Lin, Mingzhang

doi:10.1016/j.jphotochem.2019.04.034

Cited by 11 publications

(2 citation statements)

References 48 publications

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“…Various methods have been adopted in Re (Tc) separation, including solvent extraction, , adsorption, , trapping by metal–organic framework, − and reduction to insoluble species. , Among the above strategies, adsorption possesses incomparable advantages in practical treatment for a large amount of water contaminated by metal ions with low concentration . For the treatment of contaminated water after the Fukushima nuclear accident, Tokyo Electric Power Company used a complex system, including Kurion, SARRY, APLS, and other subsystems, to decontaminate 62 radionuclides, in which Tc was removed by zeolites modified with cationic surfactant cetyltrimethylammonium .…”

Section: Introductionmentioning

confidence: 99%

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Weng

Zhang

Guo

et al. 2021

ACS Appl. Mater. Interfaces

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Radioactive Tc-99 released by nuclear accidents threatens the environment and human health due to its long halflife and strong transportability. A combined strategy synergizing topological construction and chemical modification was proposed for the synthesis of high-performance adsorbents for Re as an analogue to Tc. On the one hand, hierarchically mesoporous SiO 2 with a fibrous structure (F-SiO 2 ), a peculiar topology integrating wrinkled open mesopores around 12 nm and on-wall mesopores around 3 nm, was adopted as the substrate of adsorbents. The larger mesopores can act as the superhighway for mass transfer, while the abundant smaller mesopores provide numerous adsorption sites. On the other hand, a series of dicationic pyridine (DCP) derivative groups (−Py + C n H 2n N + Me 3 ) were designed to functionalize F-SiO 2 for improving the adsorption performance toward ReO 4 − anions, the dominating form of Re in aqueous solution. Density functional theory (DFT) calculation combined with batch adsorption experiments revealed that the ReO 4 − adsorption on −Py + C 5 H 10 N + Me 3 was the most favorable when the length of the spacer between the two positively charged N atoms ranged from 2 to 7 carbons (n = 2−7). However, −Py + C 5 H 10 N + Me 3 exhibited a much slower adsorption rate than −Py + C 2 H 4 N + Me 3 . The stronger interaction between ReO 4 − and −Py + C 5 H 10 N + Me 3 suppresses the adsorbate diffusion. The two positive charges of −Py + C 5 H 10 N + Me 3 may be perpendicularly distributed, sterically hindering ReO 4 − transport in smaller mesopores. The longer and flexible carbon chains may be aggregated to form the hydrophobic region, repulsing the hydrated ReO 4 − anions. Therefore, the efficient and ultrafast Re adsorption was achieved by synergizing the unique topology of F-SiO 2 and functionalization by −Py + C 2 H 4 N + Me 3 with a shorter spacer and weaker affinity ReO 4 − . The detailed investigation demonstrated that −Py + C 2 H 4 N + Me 3 possessed exothermic adsorption nature, adequate radiation-resistance, and excellent reusability. Meanwhile, −Py + C 5 H 10 N + Me 3 exhibited stronger salinity tolerance and higher selectivity. The DCP groups are promising in decontamination of radioactive Tc, as they can meet specific requirements by manipulating the length of spacers.

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Section: Introductionmentioning

confidence: 99%

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Weng

Zhang

Guo

et al. 2021

ACS Appl. Mater. Interfaces

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“…2 H 4 ] = 3.3 M, [ReO 4 − ] = 8.6 mM, [NO 3− ] = 0.5 M), and there were two absorption peaks at 269 nm and 301 nm in the reaction process. The 269 nm absorption peak16,23,24 for ReO 4 2− gradually appeared 5 hours after the reaction, the intensity of which tended to increase at 5-21.5 h and then gradually decreased until it was not observed. This indicated that ReO 4 − was reduced to ReO 4 2−…”

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confidence: 96%

Excessive consumption mechanism of hydrazine in the reaction with ReO₄⁻: Re species evolution and ReO₂·nH₂O-catalyzed decomposition

Kang

Zhang

Chen

et al. 2022

Inorg. Chem. Front.

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Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy

Deng

Ren

Jiao

2019

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Separation of Re(VII) from aqueous solution by acetone-enhanced photoreduction: an insight into the role of acetone

Cited by 11 publications

References 48 publications

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Excessive consumption mechanism of hydrazine in the reaction with ReO₄⁻: Re species evolution and ReO₂·nH₂O-catalyzed decomposition

Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy

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Separation of Re(VII) from aqueous solution by acetone-enhanced photoreduction: an insight into the role of acetone

Cited by 11 publications

References 48 publications

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Efficient and Ultrafast Adsorption of Rhenium by Functionalized Hierarchically Mesoporous Silica: A Combined Strategy of Topological Construction and Chemical Modification

Excessive consumption mechanism of hydrazine in the reaction with ReO4−: Re species evolution and ReO2·nH2O-catalyzed decomposition

Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy

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Excessive consumption mechanism of hydrazine in the reaction with ReO₄⁻: Re species evolution and ReO₂·nH₂O-catalyzed decomposition