水中盐酸环丙沙星的超声降解

Ultrasonic degradation of ciprofloxacin hydrochloride in aqueous solution

为研究超声波降解水中盐酸环丙沙星的机理,在不同超声波功率、不同盐酸环丙沙星初始浓度以及不同添加剂条件下,对盐酸环丙沙星进行超声降解研究。在实验条件下,当功率从180 W增至1 000 W时,10 mg/L盐酸环丙沙星降解率从55.2%提高到75.3%;当功率为360 W,超声2 h时,未加添加剂时其降解率为62.5%,而加入Fe SO_4、Na Cl、H_2O_2、CCl_4、Cu SO_4、KI和N_2后其降解率分别为85.3%、65.7%、70.1%、98.8%、43.6%、8.1%和51.2%。研究结果表明,Fe SO_4、Na Cl、H_2O_2及CCl_4的添加能促进盐酸环丙沙星的超声降解,而Cu SO_4、KI和N_2却显著压抑其降解。盐酸环丙沙星的超声降解主要归因于·OH等活性自由基的氧化作用。

The effects of ultrasonic reactor,initial concentration and different additives on the degradation of ciprofloxacin hydrochloride under ultrasonic irradiation were investigated. It is observed that the degradation of10 mg/L ciprofloxacin hydrochloride increased from 55. 2% to 75. 3% with the power of ultrasonic increasing from 180 W to 1000 W. The degradation efficiency of ciprofloxacin hydrochloride was 62. 5% at the ultrasonic power of 360 W after 2 h. Moreover,the removal efficiencies were 85. 3%,65. 7%,70. 1%,98. 8%,43. 6%,8. 1% and 51. 2% with adding FeSO4,NaCl,H2O2,CCl4,CuSO4,KI and N2,respectively. The addition of Fe SO4,Na Cl,H2O2 and CCl4were favorable for the degradation efficiency of ciprofloxacin hydrochloride. In contrast,the removal of ciprofloxacin hydrochloride was obviously restrained with adding Cu SO4,KI and N2. The degradation of ciprofloxacin hydrochloride during ultrasonic treatment was mainly attributed to the oxidation with ·OH radicals.