Highly efficient removal of radioactive iodine anions by nano silver modified activated carbon fiber

Chen, Xiaojiang; Wang, Lielin; Ding, Congcong; Xie, Hua; Zou, Hao; Deng, Jiaming; Liu, Zhu; Shi, Junping; Ding, Yun

doi:10.1016/j.apsusc.2023.158644

Cited by 11 publications

(2 citation statements)

References 67 publications

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“…The XRD pattern of the in situ grown UiO-66-(OH) 2 on CA exhibits diffraction peaks consistent with the diffraction pattern of UiO-66-(OH) 2 , indicating successful formation and integration of the MOFs on CA. Upon silver loading, the XRD of Ag-UiO-66-(OH) 2 @CA reveals a new diffraction peak at 38.3°, corresponding to the (1,1,1) crystal planes characteristic of zerovalent silver (Ag 0 ) . This demonstrates the successful capture of the silver element within the UiO-66-(OH) 2 framework, effectively reducing Ag + to Ag 0 within the material.…”

Section: Resultsmentioning

confidence: 93%

In Situ Growth of MOF from Wood Aerogel toward Bromide Ion Adsorption in Simulated Saline Water

Wang,

Yang,

et al. 2024

Langmuir

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Utilizing metal−organic framework (MOF) materials for the extraction of bromide ions (Br − ) from aqueous solutions, as an alternative to chlorine gas oxidation technology, holds promising potential for future applications. However, the limitations of powdered MOFs, such as low utilization efficiency, ease of aggregation in water, and challenging recovery processes, have hindered their practical application. Shaping MOF materials into application-oriented forms represents an effective but challenging approach to address these drawbacks. In this work, a novel Ag-UiO-66-(OH) 2 @delignified wood cellulose aerogel (CA) adsorbent is synthesized using an oil bath impregnation method, involving the deposition of UiO-66-(OH) 2 nanoparticles onto CA and the uniform dispersion of Ag 0 nanoparticles across its surface. CA, characterized by the intertwined cellulose nanofiber structure and a highly hydrophilic surface, serves as an ideal substrate for the uniform growth of UiO-66-(OH) 2 nanoparticles, which, in turn, spontaneously reduce Ag + to form distributed Ag 0 nanoparticles due to the abundant hydroxyl groups provided. Leveraging the well-defined biological structure of CA, which offers excellent mass transfer channels, and the highly dispersed Ag adsorption sites, Ag-UiO-(OH) 2 /CA exhibits remarkable adsorption capacity (642 mg/g Ag ) under optimized conditions. Furthermore, an integrated device is constructed by interconnecting Ag-UiO-(OH) 2 /CA adsorbents in series, affirming its potential application in the continuous recovery of Br − . This study not only presents an efficient Ag-UiO-(OH) 2 /CA adsorbent for Br − recovery but also sheds light on the extraction of other valuable elements from various liquid ores.

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Section: Resultsmentioning

confidence: 93%

In Situ Growth of MOF from Wood Aerogel toward Bromide Ion Adsorption in Simulated Saline Water

Wang,

Yang,

et al. 2024

Langmuir

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“…The quasi-secondary kinetic ( Figure 7 B) fit of the adsorption behavior of activated carbon fibers on Zn 2+ has a higher R 2 value then Quasi first-order kinetic ( Figure 7 A) and k decreases with the increase of the pole plate spacing. 36 The time required for adsorption to reach equilibrium gradually increased with increasing pole plate spacing, and the adsorption behavior was a complex chemisorption process with a shared electron pair or electron exchange process between the activated carbon fiber mat and Zn 2+ . The quasi-secondary adsorption kinetic model provides more explanation of the adsorption behavior and can better describe the electrosorption behavior of Zn 2+ on activated carbon fiber mats.…”

Section: Resultsmentioning

confidence: 99%