Graphite Felt Supported MgO Catalytic Ozonation of Bisphenol A

ABSTRACT

Graphite felt supported magnesium oxide (MgO/GF) catalyst was prepared by the equal volume impregnation method. Bisphenol A (BPA) was chosen as the target contaminant to be degraded by different ozone-based processes. The results of X-ray powder diffraction/scanning electron microscopy showed that MgO was uniformly loaded on graphite felt. The results showed that the removal percentages of BPA and COD by MgO/GF catalytic ozonation in 9 min could reach 88.2 and 42.1, respectively, but only 48.2 and 10.5 by O₃ under the same conditions. The catalytic activity of the MgO/GF catalyst was relatively stable in 5 recycling tests. The mechanism study deduced that the high activity of MgO/GF in ozonation of BPA resulted from effective mitigation of pH change of the solution. The results show that MgO/GF is a potential catalyst in ozonation of refractory chemicals.

KEYWORDS:

• MgO
• graphite felt
• ozonation
• Bisphenol A
• degradation