US/PS体系降解水中磷酸三(2-氯乙基)酯的研究

Study on the Degradation of Tris(2-chloroethyl) Phosphate in Water by US/PS System

为研究超声活化过硫酸盐体系(US/PS体系)对磷酸三(2-氯乙基)酯(TCEP)的降解效果,该文考察了初始pH、PS浓度、超声功率、反应温度及无机阴离子对降解率的影响。结果表明:US/PS体系能有效降解TCEP,且TCEP降解率随pH的降低而增大,随PS浓度、超声功率及反应温度的增加先升高后降低。最佳条件:初始pH为3、PS浓度为3 mmol/L、超声功率180 W,反应温度25℃时,降解率能达到92.2%。部分无机阴离子对TCEP降解存在抑制作用,程度为CO32->HCO3->NO3-。Cl-浓度低于50 mmol/L时,对体系存在抑制作用,超过50 mmol/L表现为促进作用。

In order to study the degradation effect of tris(2-chloroethyl) phosphate(TCEP) by ultrasonic activated persulfate system(US/PS system), the impact of initial pH, PS concentration, ultrasonic power, reaction temperature, and inorganic anion on degradation rate was investigated. The results show that the US/PS system can effectively degrade TCEP, and the degradation rate of TCEP increases with decreasing p H, and increases first and then decreases with increasing PS concentration,ultrasonic power, and reaction temperature. Under the optimal conditions such as the initial pH 3, the PS concentration 3 mmol/L, the ultrasonic power 180 W, the degradation rate can reach 92.2% when the reaction temperature is 25 ℃. Some inorganic anions have an inhibitory effect on the degradation of TCEP to the extent of CO32-> HCO3-> NO3-. When the concentration of Cl-is less than 50 mmol/L, there is an inhibitory effect on the system, and when it exceeds 50 mmol/L, it shows a promotion effect.