Kim, Y, Kim, YK, Kim, S et al. (2 more authors) (2017) Nanostructured potassium copper hexacyanoferrate-cellulose hydrogel for selective and rapid cesium adsorption. Chemical Engineering Journal, 313. pp. 1042-1050. ISSN 1385-8947
Abstract
Potassium copper hexacyanoferrate (KCuHCF) was synthesized and immobilized in a cellulose-based hydrogel made of carboxymethyl cellulose (CMC) and hydroxyethyl cellulose (HEC) for the adsorption of cesium ions in aqueous solutions. The immobilization with the cellulose-based hydrogel facilitated the dispersion of nano-sized KCuHCF particles, showing the unprecedented adsorption capacity of the composite. In Cs+ removal experiments, KCuHCF-cellulose hydrogel composites (HCF-gels) exhibited exceptional Cs+ adsorption capacities (2.06-2.32 mmol g-1) which was attributed to the presence of ion-exchangeable sites (COO-Na+) in the cellulose hydrogel. The HCF-gels also exhibited a rapid Cs+ removal (90.1% removal for 0.15 mmol L-1 of Cs+ in 1 h) with the uptake reaction kinetics expressed by a pseudo-second order kinetics model. Notably, the HCF-gels could adsorb Cs+ selectively (>90%) in seawater containing 0.11 mmol L-1 Cs+. Such specificity with fast kinetics is due to the high ion accessibility from the inherent nature of hydrogels and the highly dispersed KCuHCF nanoparticles in the composites.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier B.V. This is an author produced version of a paper published in Chemical Engineering Journal. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Cesium adsorption; Immobilization; Potassium copper hexacyanoferrate; Cellulose 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: | 07 Nov 2016 15:01 |
Last Modified: | 01 Nov 2017 16:39 |
Published Version: | https://doi.org/10.1016/j.cej.2016.10.136 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.cej.2016.10.136 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107138 |