[Mechanism discussion of gamma-alumina catalyzed ozonation for 2-methylisoborneol removal].
The efficiency and mechanism in degradation of 2-methylisoborneol (MIB) as taste and odor compound in drinking water were studied under the condition where gamma-alumina catalyzed ozonation. As a result, gamma-alumina can behave distinct activity in enhancing the efficiency of ozonation MIB. Tert-butyl alcohol had a remarkable restrain effect on removal efficiency of catalytic ozonation MIB by gamma-alumina. The surface charge status and surface hydroxyl groups status of gamma-alumina and pH values of the solution can be linked together. When the pH value of solution was near the pH(zpc) of gamma-Al2O3, there was a most observable activity in catalyzed ozonation process. R(ct), which denoted the relative concentration of hydroxyl radical (*OH), was much higher in catalyzed ozonation process than in ozonation process. This result further illuminated that gamma-Al2O3 can promote ozone decomposition to produce *OH. Finally, it was investigated that the effect of r(P/I) on catalyzed ozone decomposition and ozone decomposition.
Chen
Zhong-Lin
ZL
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. zhonglinchen@hit.edu.cn
Qi
Fei
F
Xu
Bing-Bing
BB
Shen
Ji-Min
JM
Ben
Yue
Y
Ye
Miao-Miao
MM
D000537:Aluminum Oxide / Q000737:chemistry*; D001892:Camphanes / Q000737:chemistry* / Q000302:isolation & purification; D002384:Catalysis; D009812:Odorants / Q000032:analysis; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*; D014881:Water Supply
D001892:Camphanes; D014874:Water Pollutants, Chemical; C005536:2-methylisoborneol; D010126:Ozone; D000537:Aluminum Oxide