Heterogeneous catalytic ozonation of COD and quinoline from coal gasification wastewater secondary effluent with carbon supported copper oxides as catalyst
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.
Coal gasification wastewater secondary effluent Catalytic ozonation CuOx /GAC Quinoline tert-butanol
Hongjun Han Haifeng Zhuang
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology,Harbin 150090, China
国际会议
杭州
英文
379-382
2013-01-18（万方平台首次上网日期，不代表论文的发表时间）