为了了解超声波对水溶液中盐酸四环素（TC·HCl）的降解作用，探讨了超声频率、超声功率、溶液初始质量浓度、pH值以及阴离子对降解效果的影响．结果表明：超声可快速有效地降解水中的Tc·HCl，超声对TC·HCl的降解符合拟一级动力学模型．当pH值为5．60左右、超声频率为400kHz、超声功率为100W时，超声辐照20min后，1．00mg／LTC·HCl的去除率可达到88．17％；在试验所研究的范围内，TC·HCl的降解速率随超声功率的增大而提高，随初始质量浓度的增大而降低；溶液pH值对降解效果影响显著，碱性条件更利于TC·HCl的降解；Cl^-和SO₄ ^2-对TC·HCl的降解稍有抑制，NO₃^-离子对TC·HCl降解略有促进，而HCO₃^-、HPO₄ ^2-的促进作用显著．

This paper deals with the ultrasonic degradation of tetracycline hydrochloride （TC.HCl） in aqueous solution and reveals the effects of ultrasonic frequency, ultrasonic power, initial mass concentration of the solution, pH value and anion on the degradation efficiency. The results indicate that （1） with ultrasonic irradiation, TC . HCl in aqueous solution effectively degrades with high speed, which accords with the pseudo first-order reaction model; （2） at a pH value of about 5.60, 88. 17% of 1.00mg/L TC . HCl is decomposed within 20min under the irradiation with 400 kHz and 100 W ultrasonic ; （3） the degradation rate of TC . HCl increases with the increase in ultrasonic power and with the decrease in the initial TC . HCl concentration; （4） the pH value of the solution greatly influences the TC . HCl degradation and the degradation performs well in alkaline condition; and （5） Cl^- and SO₄ ^2- slightly inhibit the degradation, while NO₃^- , HCO₃^-、 and HPO₄ ^2- accelerate the degradation, especially the latter two.