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Materials 2018, 11(7), 1165; https://doi.org/10.3390/ma11071165

Rapid Ferric Transformation by Reductive Dissolution of Schwertmannite for Highly Efficient Catalytic Degradation of Rhodamine B

1,* and 2
1
School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
2
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Received: 31 May 2018 / Revised: 3 July 2018 / Accepted: 5 July 2018 / Published: 9 July 2018
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Abstract

In this study, reductive dissolution of iron oxides was considered for the acceleration of the transformation from Fe(III) to Fe(II) to improve the degradation of rhodamine B (RhB) by potassium persulfate (PS) activation on schwertmannite. The addition of hydroxylamine (HA) showed an enhancement effect on the degradation at pH 3 and 5, but insignificant efficiency of the addition was obtained at pH 9. The surface reduction from Fe(III)-OH to Fe(II)-OH by HA was considered dominant for the acceleration of PS activation through the reductive dissolution process, and the hydroxyl and sulfate radicals generated by the decomposition of surface complexes were main primary reactive oxidants that contributed to the degradation of RhB. View Full-Text
Keywords: ferric transformation; reductive dissolution; schwertmannite; heterogeneous ferric transformation; reductive dissolution; schwertmannite; heterogeneous
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Ran, J.; Yu, B. Rapid Ferric Transformation by Reductive Dissolution of Schwertmannite for Highly Efficient Catalytic Degradation of Rhodamine B. Materials 2018, 11, 1165.

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