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
Issue Date
2020-05
Publisher
Pergamon Press Ltd.
Citation
Carbohydrate Polymers, v.235
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/g(PB-CMCNF)) than commercial PB nanoparticles, even though the PB loading of the PB-CMCNF membrane was less than 100 mg/g(PB-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, Cs-137 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 Cs-137 from aqueous environments.
Keywords
IN-SITU GROWTH; ADSORPTION BEHAVIOR; GRAPHENE OXIDE; BEADS; IONS; ADSORBENTS; STRONTIUM; NANOCOMPOSITES; PRECIPITATION; EXTRACTION; Carboxymethyl cellulose nano-fibril; Prussian blue (PB); PB-membrane; (CS)-C-137; Seawater
ISSN
0144-8617
URI
https://pubs.kist.re.kr/handle/201004/118640
DOI
10.1016/j.carbpol.2020.115984
Appears in Collections:
KIST Article > 2020
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