Ma Jun, Zhang Tao, Chen Zhong-lin, Sui Ming-hao, Li Xue-yan
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2005 Mar;26(2):78-82.
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.
本文测定了臭氧在颗粒活性炭（GAC）和氢氧化铁/颗粒活性炭（FeOOH/GAC）催化剂上在水中的分解速率，并探讨了臭氧催化分解的机理。测定了几种金属氧化物上水中痕量硝基苯的催化臭氧化活性，并将其与它们的表面羟基密度和零电荷点pH值（pHzpc）相关联。结果表明：1）对于GAC和FeOOH/GAC催化剂，臭氧分解的准一级速率分别提高了68%和108%；2）加入叔丁醇后，GAC的速率常数降低了9%，FeOOH/GAC的速率常数降低了20%；3）羟基表面密度与硝基苯催化臭氧化活性之间没有直接相关性；4）接近零电荷点的氧化物表面有利于硝基苯的催化臭氧化。
