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Prussian blue-embedded carboxymethyl cellulose nanofibril membranes for removing radioactive cesium from aqueous solution

Title
Prussian blue-embedded carboxymethyl cellulose nanofibril membranes for removing radioactive cesium from aqueous solution
Authors
Eun, SeminHong, Hye-JinKim, HyuncheolJeong, Hyeon SuKim, SoonhyunJung, JongwonRyu, Jungho
DGIST Authors
Kim, Soonhyun
Issue Date
2020-05
Citation
Carbohydrate Polymers, 235, 115984
Type
Article
Article Type
Article
Author Keywords
Carboxymethyl cellulose nano-fibrilPrussian blue (PB)PB-membrane(CS)-C-137Seawater
Keywords
IN-SITU GROWTHADSORPTION BEHAVIORGRAPHENE OXIDEBEADSIONSADSORBENTSSTRONTIUMNANOCOMPOSITESPRECIPITATIONEXTRACTION
ISSN
0144-8617
Abstract
In this study, we synthesized a Prussian blue (PB)-embedded macroporous carboxymethyl cellulose nanofibril (CMCNF) membrane for facile cesium (Cs) removal. The PB was formed in situ at Fe3+ sites on a CMCNF framework cross-linked using FeCl3 as a cross-linking agent. Cubic PB particles of size 5–20 nm were observed on the macroporous CMCNF membrane surface. The PB-CMCNF membrane showed 2.5-fold greater Cs adsorption capacity (130 mg/gPB-CMCNF) than commercial PB nanoparticles, even though the PB loading of the PB-CMCNF membrane was less than 100 mg/gPB-CMCNF. The macroporous structure of the CMCNF membrane led to improved diffusion in the solution, thereby increasing the Cs adsorption capacity. The Cs adsorption behavior was systematically investigated in different solution chemistry. Finally, 137Cs removal using a semicontinuous adsorption module was demonstrated in real seawater. The results showed that the PB-CMCNF membrane is a highly effective, practical material for the removal of 137Cs from aqueous environments. © 2020 Elsevier Ltd
URI
http://hdl.handle.net/20.500.11750/11613
DOI
10.1016/j.carbpol.2020.115984
Publisher
Elsevier Ltd
Related Researcher
Files:
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Collection:
Division of Energy Technology1. Journal Articles


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