中文摘要：

研究了2，3，4，6-四氯酚（TeCP）在超声波／零价铁协同体系中的降解，结果表明，拟一级动力学能很好的拟合降解过程，协同体系中TeCP一级降解速率常数为0．0141min^-1，为同等条件下零价铁体系降解速率常数的10．07倍，且大于两者之和，说明两者之间存在明显协同效应；零价铁（Fe^0）投加量、初始pH值、初始TeCP浓度（Co）、超声功率和溶液离子强度等控制参数对TeCP降解速率的影响表明，其拟一级速率常数在Fe^0量为2g·l^-1，初始pH值为6．0，离子强度0．8mol·l^-1 Na2SO4以及超声功率350W时达最大值，并随着C0的升高而降低．

英文摘要：

The degradation of aqueous 2,3,4,6-tetrachlorophenol （TeCP） by ultrasound combined with element iron （ US/Fe^0） was investigated, the pseudo-first-order rate constant, kUS/Fe^0, for TeCP degradation by US/Fe^0 was 0. 0141min^-1, which was 10. 07 times as large as kFe0, and greater than the sum of kUS and kFe0, these evidences suggested that synergistic effects between US and Fe^0 existed. The influences of Fe^0 dose （ [ Fe^0] ）, solution initial pH, initial TeCP concentration, solution ionic strength and ultrasonic power, on the rate constant of TeCP degradation by US/Fe^0, were studied. The rate constant was found largest at [ Fe^0] 2 g·l^-1 , initial pH 6.0, 0. 8mol·l^-1 Na2SO4 of ionic strength and 350 W of ultrasonic power respectively, and decrease with initial TeCP concentration increasing.