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Appl. Sci. 2012, 2(1), 166-174; doi:10.3390/app2010166
Article

Reduction and Immobilization of Potassium Permanganate on Iron Oxide Catalyst by Fluidized-Bed Crystallization Technology

1
, 2,3,* , 2
, 2
 and 1
1 Department of Environmental Engineering, Wuhan University, P.O. Box C319 Luoyu Road 129#, Wuhan 430079, China 2 Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan 3 Sustainable Environment Research Center, National Cheng Kung University, Tainan 701, Taiwan
* Author to whom correspondence should be addressed.
Received: 9 February 2012 / Revised: 21 February 2012 / Accepted: 23 February 2012 / Published: 1 March 2012
(This article belongs to the Special Issue Feature Papers)
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Abstract

A manganese immobilization technology in a fluidized-bed reactor (FBR) was developed by using a waste iron oxide (i.e., BT-3) as catalyst which is a by-product from the fluidized-bed Fenton reaction (FBR-Fenton). It was found that BT-3 could easily reduce potassium permanganate (KMnO4) to MnO2. Furthermore, MnO2 could accumulate on the surface of BT-3 catalyst to form a new Fe-Mn oxide. Laboratory experiments were carried out to investigate the KMnO4-reduction mechanism, including the effect of KMnO4 concentration, BT-3 dosage, and operational solution pH. The results showed that the pH solution was a significant factor in the reduction of KMnO4. At the optimum level, pHf 6, KMnO4 was virtually reduced in 10 min. A pseudo-first order reaction was employed to describe the reduction rate of KMnO4.
Keywords: Fluidized-Bed Reactor (FBR); iron oxide; potassium permanganate Fluidized-Bed Reactor (FBR); iron oxide; potassium permanganate
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Li, G.-X.; Huaug, Y.-H.; Chen, T.-C.; Shih, Y.-J.; Zhang, H. Reduction and Immobilization of Potassium Permanganate on Iron Oxide Catalyst by Fluidized-Bed Crystallization Technology. Appl. Sci. 2012, 2, 166-174.

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