水环境中2，4，6－三氯酚的光化学降解研究

研究了2，4，6－三氯酚（TCP）在水中不同存在形态、水体pH值、溶解氧、藻类对其光化学降解行为的影响。先用孔雀绿无色氰化物（MGLC），计算天津海河、北排污河两个自然水体，底泥悬浮物引起的光分散衰减系数，再用RG.Zeep公式预测出天津海河水中TCP的光解速率高于天津北排污河。天津污水土地处理系统进口水中TCP的光解速率常数：在夏季，kd＝0.059（h^-1）；在冬季kd＝0.011（b^-1）；光解半衰期为19.8h^-1。实验结果为处理后污水的安全回用提供了科学依据。

Study of 2, 4, 6-trichlorophenol photochemical degradation in aquatic environment

he experiments of 2,4,6-trichlorophenol(TCP)of different existiog forms, PH,Do,and algae in water body on photochemical degradation were studied. The malachite green leucocyanide was employed to compute diffuse attenuation coefficients for sediment suspensions from two matural water bodies in Tianjin,Sea River and North Wastewater Canal.We have predicted the photolysis rate of the TCP by R.G.Zeep equations.Sea River of higher photolysis rate than the other one.The photolysis rate constants of the TCP in the influent of Tianjin Wastewater Landtreatment System equals 19. 8(h-1). The experimental results provide scientific proofs for safe reuse of treated wastewater.