活性炭催化臭氧氧化水中诺氟沙星

Activated carbon catalytic ozonation of norfloxacin in water

以椰壳基活性炭为催化剂,采用催化臭氧氧化工艺降解诺氟沙星(NF),优化了工艺条件,评价了催化活性,并对反应机理进行了探讨。实验结果表明:活性炭催化臭氧氧化工艺的优化条件为臭氧通量80 mg/h、初始NF质量浓度15.0 mg/L、反应温度25℃、初始NF溶液p H 5.0;在该优化条件下反应60 min时,TOC去除率达51.5%,较单独臭氧氧化的32.5%和单独活性炭吸附的11.5%有明显改善;在活性炭催化臭氧氧化工艺中臭氧氧化与活性炭吸附之间存在一定的协同作用,活性炭具有较好的催化活性;活性炭催化臭氧氧化工艺对NF的去除主要是基于臭氧的直接氧化作用。

Norfloxacin （NF） was degraded by catalytic ozonation process using activated carbon （AC） from coconut shell as catalyst. The process conditions were optimized, the catalytic activity was evaluated, and the degradation mechanism was discussed. The experimental results show that： Under the optimum conditions of ozone flux 80 mg/ h, initial NF mass concentration 15.0 mg/L, reaction temperature 25 ℃, initial NF solution pH 5.0 and reaction time 60 min, the TOC removal rate is 51.5%, which is obviously improved than 32.5% by ozonation and 11.5% by AC adsorption; Synergistic effect is presented between ozonation and AC adsorption in the AC catalytic ozonation process, and AC has good catalytic activity; The removal of NF by the process is mainly based on direct ozonation.