Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
581933 | Journal of Hazardous Materials | 2009 | 6 Pages |
Abstract
The aim of this research was to investigate catalytic activity of petroleum coke, activated carbon (AC) prepared from this material, Ni supported catalyst on activated carbon (Ni/AC) in the ozonation of aqueous phase p-chlorobenzoic acid (p-CBA). Activated carbon and Ni/AC catalyst were characterized by XRD and SEM. The presence of petroleum coke did not improve the degradation of p-CBA compared to ozonation alone, but it was advantageous for p-CBA mineralization (total organic carbon, TOC, reduction), indicating the generation of highly oxidant species (OH) in the medium. The presence of either activated carbon or Ni/AC considerably improves TOC removal during p-CBA ozonation. Ni/AC catalyst shows the better catalytic activity and stability based on five repeated tests during p-CBA ozonation. During the ozonation (50Â mg/h ozone flow rate) of a 10Â mg/L p-CBA (pH 4.31), it can be more mineralized in the presence of Ni/AC catalyst (5.0Â g/L), TOC removal rate is over 60% in 60Â min, 43% using activated carbon as catalyst, only 30% with ozonation alone.
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Authors
Xukai Li, Qiuyun Zhang, Lili Tang, Ping Lu, Fengqiang Sun, Laisheng Li,