Dynamics principal and degradation products of tris (2-chloroethyl) phosphate (TCEP) degradation with ultraviolet persulfate (UV/PS) process were studied.Results indicated that removal rate constant of TCEP reached 0.124 0 min-1 when[TCEP] 0 was 3.0 μmol/L,pH value was 7.0,temperature was 25±2 ℃,[S2O28-] 0 was 150 μmol/L.Under this experimental condition,three organic degrading products,with molecular formula of C4 H9 Cl2 O4 P,C6 H13 Cl2 O5 P and C2 H6 ClO4 P,were determined using high resolution mass spectrum.Neutral and acid conditions had slight effects on the degradation efficiency,and strong basic condition had a negative effect on the reaction rate.NO3-and Cl-had slight negative impacts on reaction,while the humic acid had severe negative effect.%研究了紫外-过硫酸盐(UV/PS)工艺降解磷酸三(2-氯乙基)酯(TCEP)的动力学原理和降解产物.结果表明,当[TCEP]0=3.0μmol/L、pH值=7.0、温度为25±2℃、[S2O28-]0=150 μmol/L时,254 nm UV/PS工艺对TCEP去除速率常数kobs为0.1240 min-1.在以上研究条件下,采用高分辨质谱检测到3种有机降解产物,分子式分别为C4 H9 CL2 O4P、C6 H13 Cl2 O5P和C2H6ClO4P.中性和酸性条件对反应影响不大,但强碱性条件不利于降解.NO3-、Cl-对反应有所影响,腐植酸对反应的影响较大.
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