This paper aimed to reveal the effectiveness and the mechanism of catalytic ozonation in the presence of iron silicate for the degradation of o-chloronitrobenzene (oCNB). Experimental results show that catalytic ozonation in the presence of iron silicate could substantially enhance oCNB removal efficiency compared with ozonation alone, and that the adsorption of oCNB on the iron silicate surface had no significant effect on the degradation of oCNB. The results of a hydroxyl radical scavenger experiment using spin-trapping/EPR technology to identify hydroxyl radicals (•OH) confirm that •OH were the main active species in the removal of oCNB during the ozonation process catalyzed by iron silicate. The catalytic activity of the iron silicate was related to a highly hydroxylated surface. It was confirmed that the surface hydroxyl groups on the iron silicate were the reaction sites between ozone and oCNB.
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February 01 2012
Ozonation catalyzed by iron silicate for the degradation of o-chloronitrobenzene in drinking water Available to Purchase
Y. Liu;
Y. Liu
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
2School of Energy & Environment Engineering, Zhongyuan University of Technology, Zhengzhou, 451191, China
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Z. Chen;
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
E-mail: [email protected]; [email protected]
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L. Yang;
L. Yang
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
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Y. Han;
Y. Han
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
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J. Shen;
J. Shen
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
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H. Wang
H. Wang
1State Key Laboratory of Urban Water Resources and Environment, School of Municipal & Environmental Engineering, The Second Campus, Harbin Institute of Technology, P.O. Box 2606, Harbin, 150090, China
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Water Supply (2012) 12 (1): 31–37.
Article history
Received:
July 07 2010
Accepted:
September 24 2010
Citation
Y. Liu, Z. Chen, L. Yang, Y. Han, J. Shen, H. Wang; Ozonation catalyzed by iron silicate for the degradation of o-chloronitrobenzene in drinking water. Water Supply 1 February 2012; 12 (1): 31–37. doi: https://doi.org/10.2166/ws.2011.096
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