Kim, YK, Kim, Y, Kim, S et al. (2 more authors) (2017) Solvent-assisted synthesis of potassium copper hexacyanoferrate embedded 3D-interconnected porous hydrogel for highly selective and rapid cesium ion removal. Journal of Environmental Chemical Engineering, 5 (1). pp. 975-986. ISSN 2213-3437
Abstract
Potassium copper hexacyanoferrate-embedded poly(vinyl alcohol)-citric acid hydrogel film (HPC) was prepared via a two-step method of Cu immobilization, followed by the diffusion of potassium hexacyanoferrate accelerated by acetone evaporation. The diffusion-derived KCuHCF formation in the preformed hydrogel facilitated the preservation of the 3D-interconnected hydrogel structure and dispersion of the KCuHCF nanoparticles. Using acetone as a non-solvent, reverse diffusion of the incorporated Cu in the hydrogel matrix was hindered; hence a large amount of KCuHCF was loaded in the matrix. The HPC exhibited substantially enhanced Cs+ removal properties in terms of adsorption capacity, kinetics and selectivity. From the adsorption isotherm, the HPC showed a very high Cs+ uptake of 667 mg/g KCuHCF. Moreover, the adsorbent revealed stable and high Cs+ removal efficiency of 99.9% across a wide pH range from 2 to 10. The kinetics of Cs+ removal was remarkably rapid with 99.5% removal achieved within 30 min from a dilute Cs+ solution (9.18 ppm). When using seawater, the HPC exhibited almost unaltered Cs+ removal efficiency above 99.5%, and high distribution coefficient Kd value of 7.7 × 105 ml/g at an extremely low Cs+ concentration (0.67 ppm, V/m = 1000 ml/g), which highlighted the tremendous affinity for Cs+.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier Ltd. This is an author produced version of a paper published in Journal of Environmental Chemical Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Cesium removal; Fukushima; Potassium copper hexacyanoferrate; Poly(vinyl alcohol) hydrogel |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 30 Jan 2017 10:30 |
Last Modified: | 22 Jan 2018 01:38 |
Published Version: | https://doi.org/10.1016/j.jece.2017.01.026 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jece.2017.01.026 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111376 |