Enhanced Cr(vi) removal by hierarchical CoFe2O4@SiO2–NH2via reduction and adsorption processes

In order to realize the highly effective removal of toxic Cr(vi), 3D porous CoFe2O4@SiO2–NH2 has been successfully fabricated. As expected, the saturated adsorption capacity of the resulting CoFe2O4@SiO2–NH2 composite towards Cr(vi) can reach up to 126.8 mg g−1, superior to most Fe-containing adsorb...

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Bibliographic Details
Published in:New journal of chemistry 2022-07, Vol.46 (28), p.13686-13692
Main Authors: Zhou, Dongqin, Wang, Jie, Chen, Hao, Ge, Xiao, Wang, Xiaozhi
Format: Article
Language:English
Subjects:
Adsorption
Cobalt ferrites
Iron
Reduction
Silicon dioxide
Online Access:Get full text
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Summary:In order to realize the highly effective removal of toxic Cr(vi), 3D porous CoFe2O4@SiO2–NH2 has been successfully fabricated. As expected, the saturated adsorption capacity of the resulting CoFe2O4@SiO2–NH2 composite towards Cr(vi) can reach up to 126.8 mg g−1, superior to most Fe-containing adsorbents. In addition, the obtained CoFe2O4@SiO2–NH2 exhibits excellent Cr(vi) removal performance after four consecutive adsorption–desorption cycles. The exceptional Cr(vi) removal performance can be ascribed to its excellent electrostatic effect as well as the reduction process originating from the –CH group. Therefore, the hierarchically porous CoFe2O4@SiO2–NH2 is expected to be highly applicable in Cr(vi)-contaminated water remediation.
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj02313j