%0 Journal Article
%T Study on Mechanism of Ceramic Honeycomb-Catalytic Ozonation for the Decomposition of Trace Nitrobenzene in Aqueous Solution<br>蜂窝陶瓷催化臭氧化降解水中痕量硝基苯的机理研究
%A ZHAO Lei
%A MA Jun
%A SUN Zhi-zhong
%A LIU Zheng-qian
%A YANG Yi-xin
%A LU Wei
%A <br>赵雷
%A 马军
%A 孙志忠
%A 刘正乾
%A 杨忆新
%A 路炜
%J 环境科学
%D 2007
%I 
%X The experiment investigated effects of the presence of hydroxyl radical inhibitor on degradation efficiency of trace nitrobenzene in aqueous solution in the processes of ozonation alone and ceramic honeycomb-catalyzed ozonation, including HCO3-, CO3(2-), HPO4(2-), H2PO4- and tert-butanol, and studied preliminarily on their mechanism. The results indicated that degradation rate of the two processes both increased firstly and decreased subsequently with the increase of the concentration of HCO3- (0 - 200 mg x L(-1)), and reached the climax at the concentration of bicarbonate ion 50 mg x L(-1) under the same experimental condition. The degradation rates of ozonation alone and ozonation/ ceramic honeycomb both declined by 16.57% and 27.52% with the increase of the concentration of CO3(2-) (0 - 20 mg x L(-1)), respectively, and decreased by 13.61% and 17.52% with the addition of the concentration of HPO4(2-) (0 - 12 mg x L(-1)), and reduced by 6.61% and 12.52% with the enhancement of the concentration of H2PO4- (0 - 120 mg x L(-1)), and dropped by 30.06% and 46.09% with the increasing of the concentration of tert-butanol (0 - 10 mg x L(-1)). The experimental results indicated that decomposition of nitrobenzene in both processes all followed the mechanism of oxidization by OH free radical, and tert-butanol is a more suitable indicator for the radical type reaction. The removal rate of ozonation alone rose with the increase of the concentration of pH (3.02 - 10.96), but that of ozonation/ceramic honeycomb process reached the maximum at pH = 9.23.
%K ceramic honeycomb
%K catalytic ozonation
%K decomposition
%K nitrobenzene
%K mechanism
%K hydroxyl radical
%K inhibitor<br>蜂窝陶瓷
%K 催化臭氧化
%K 降解
%K 硝基苯
%K 机理
%K 羟基自由基
%K 抑制剂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3ff3aba7486768130c3ff830376f43b398e0c97f0ff2dd53&cid=a7ca601309f5fed03c078bce383971dc&jid=64cd0aa99dd39f69401c615b85f123ef&aid=660dc3f07bdd677300c5841a77bd155f&yid=a732af04dda03bb3&vid=d3e34374a0d77d7f&iid=0b39a22176ce99fb&sid=b66c5792f4740920&eid=4b168891b5e5fb30&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=49