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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 (CC BY 3.0).
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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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