Cited 5 time in webofscience Cited 6 time in scopus

Conventional and photoinduced radioactive 137Cs removal by adsorption on FeFe, CoFe, and NiFe Prussian blue analogues

Title
Conventional and photoinduced radioactive 137Cs removal by adsorption on FeFe, CoFe, and NiFe Prussian blue analogues
Authors
Kim, MinsunPark, Jeong-HyunLim, Jong-MyoungKim, HyuncheolKim, Soonhyun
DGIST Authors
Kim, Minsun; Kim, Soonhyun
Issue Date
2021-02
Citation
Chemical Engineering Journal, 405, 126568
Type
Article
Article Type
Article
Author Keywords
Cesium removalPrussian blue analoguesPhotoinduced adsorptionRadioactive cesiumUV light irradiation
ISSN
1385-8947
Abstract
Prussian blue analogues (PBAs) have received much attention as materials for radioactive Cs removal due to their affinity for adsorbing Cs+. In this study, we have synthesized PBAs using Ni(II), Co(II), and Fe(II) to prepare NiFe-PBA, CoFe-PBA, and FeFe-PBA and have added different quantities of sodium citrate as a stabilizing agent to adjust particle size and surface area. The PBAs also were composited with TiO2, and the efficiency of Cs+ adsorption was compared in the dark and under UV-light irradiation. Larger surface areas and smaller particle sizes yield better Cs+ adsorption with NiFe-PBA, NiFe-TiO2. FeFe-TiO2 exhibits enhanced Cs+ adsorption under UV irradiation. The adsorption capacity of NiFe-PBA more than doubles from ~0.8 mmol·g−1 in the dark to 1.7 mmol·g−1 under UV light. The adsorption capacity of the NiFe-TiO2 composite approximately triples from 0.45 mmol·g−1 in the dark to 1.5 mmol·g−1 under UV irradiation. Enhanced photoinduced adsorption on NiFe PBAs also is observed with radioactive 137Cs+. The enhancement of Cs+ adsorption by NiFe PBAs is the result of a photoinduced charge transfer reaction within the NiFe PBA structure. This study is the first report of enhanced photoinduced removal of Cs+ using PBAs, which is an attractive strategy for the removal of the radioactive Cs+ from contaminated water. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12746
DOI
10.1016/j.cej.2020.126568
Publisher
Elsevier BV
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Energy Technology1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE