臭氧氧化降解水中氯霉素的效能

Performance of Degradation of Chloramphenicol in Water by Ozonation Process

采用半连续流试验方式,对臭氧氧化水中氯霉素的效果进行了研究,发现臭氧对氯霉素有一定程度的降解作用,但对其矿化作用有限。碱性条件有利于臭氧氧化水中氯霉素,其机理在于具有强氧化能力的羟基自由基的生成。腐殖酸对臭氧氧化氯霉素的影响与腐殖酸的浓度有关。腐殖酸浓度低于0.7 mg/L(DOC)时对臭氧氧化氯霉素效果有所促进;浓度达到1.0 mg/L(DOC)时,未对臭氧氧化氯霉素效果产生明显影响。而随着腐殖酸浓度的进一步提高,氯霉素降解效果逐渐降低。

Semi-continuous experimental mode was used to investigate the effect of ozone oxidation of ehloramphenieol in water. It is found that the ehloramphenieol could be degraded by ozone, while ozone can not thoroughly mineralize the ehloramphenieol into carbon dioxide and water. Basic condition is beneficial for ozonation of ehloramphenieol which could be contributed by the generated hydroxyl free radicals. The effect of humic acid on ozonation of ehlormyeetin process is found to be dependent on the concentration of humie acid. The presence of humie acid with initial concentration lower than 0.7 mg/L promotes the degradation of chloramphenieol, and the insignificant effect is observed when humie acid is 1.0 mg/L. However, if the initial concentration of humie acid is further in- creased, the degradation effect of ehlorarnphenieol decreases.