Toluene was indirectly oxidized and absorbed by micro-nano bubble gas-liquid dispersion sys-tem coupled with ceramic membrane.The effects of initial pH of the absorption liquid,toluene concentra-tion and flow rate on the oxidation and absorption efficiencies of toluene were investigated,and the reac-tion mechanism was also studied.The results showed that the absorption of toluene in the neutral solution was the best,and the absorption efficiencies decreased with the increase of toluene concentration and gas flow rate.Under the optimal conditions of pH 7.00,toluene concentration 256.06 mg/cm3 and gas flow rate 150 mL/min,the absorption efficiency of toluene reached 95.98％.In addition,the degradation prod-ucts and mechanism analysis showed that·OH released by micro-nano bubbles oxidized and degraded toluene to form CO2 and water,and it was absorbed in the liquid phase.
关键词
微纳米气泡/陶瓷膜/氧化吸收/甲苯
Key words
micro-nano bubble/ceramic membrane/oxidation and absorption/toluene
维普
万方数据