Decolorization of reactive bright red K2G dye: electrochemical process catalyzed by manganese mineral
Liu, H.J.; Qu, J.H.
Water Science and Technology a Journal of the International Association on Water Pollution Research 46(11-12): 133-138
2002
ISSN/ISBN: 0273-1223 PMID: 12523744 Document Number: 543006
This paper presents the results of the decolorization of azo dye K2G by the electrochemical process catalyzed by manganese mineral. It is proved that the MnOOH(s), main component of the manganese mineral, can catalyze the electrochemical process and enhance the decolorization efficiency. X-ray powder diffraction spectrum shows that the content of MnOOH(s) has not been changed at the end of the reaction. The effects of initial pH value, current density, concentration of electrolyte on the decolorization efficiency of the dye were investigated in detail. The initial pH effect on the decolorization efficiency of K2G dye is found not to be significant. The optimum current density is 0.26 A/dm2. In addition, a proposed catalyzing mechanism of manganese mineral is discussed in this paper.