Heterogeneous Catalytic Ozonation of COD and Quinoline from Coal Gasification Wastewater Secondary Effluent with Carbon Supported Copper Oxides as Catalyst
Heterogeneous Catalytic Ozonation of COD and Quinoline from Coal Gasification Wastewater Secondary Effluent with Carbon Supported Copper Oxides as Catalyst
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DOI：
10.4028/www.scientific.net/amm.316-317.379
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发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Hong-jun Han;Haifeng Zhuang
中科院分区：
文献类型：
--
作者：
Hong-jun Han;Haifeng Zhuang
Coal gasification wastewater (CGW) is a refractory and toxic wastewater. The secondary effluent quality usually cannot meet the discharge standards after conventional biological treatment processes. Heterogeneous catalytic ozonation is a promising technology for solving this problem. Two carbon materials were investigated as ozonation catalysts for the removal of the quinoline and COD in a real CGW secondary effluent. Results were indicated that CuOx /GAC presented a higher catalytic performance than granular activated carbon and single ozone, efficiency of removal of quinoline and COD were 69%, 92% respectively. Higher pH had positive effect on the degradation of quinoline due to the formation of hydroxyl radical (removal of quinoline rapidly reached above 90% in pH=10). The presence of the radical scavenger tert-butanol (TBA) evidenced the participation of hydroxyl radicals (•OH) in the oxidation mechanisms of quinoline. The stability of the catalysts was demonstrated by carrying repetitive experiments reusing catalysts sample.
