[Pathway of aqueous ferric hydroxide catalyzed ozone decomposition and ozonation of trace nitrobenzene].
In this paper, the decomposition rate of ozone in water was measured over GAC and ferric hydroxide/GAC (FeOOH/GAC) catalyst and the mechanism of ozone catalytic decomposition was discussed. The catalytic ozonation activity of trace nitrobenzene in water was determined on several metal oxides and correlated with their surface density of hydroxyl groups and pHzpc,(pH of zero point of charge). The results show that: 1) The pseudo-first order rate of ozone decomposition increased by 68 and 108 percent for GAC and FeOOH/GAC catalysts respectively; 2) When t-butanol was added, the rate constant decreased by 9 % for GAC and 20% for FeOOH/GAC; 3) There was no direct correlation between surface density of hydroxyl groups and the activity of catalytic ozonation of nitrobenzene; 4) The oxide surface at nearly zero charged point was favorable for the catalytic ozonation of nitrobenzene.
Ma
Jun
J
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Zhang
Tao
T
Chen
Zhong-lin
ZL
Sui
Ming-hao
MH
Li
Xue-yan
XY
D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D009578:Nitrobenzenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D005290:Ferric Compounds; D009578:Nitrobenzenes; D014874:Water Pollutants, Chemical; C021024:ferric hydroxide; D010126:Ozone; C036077:nitrobenzene