Degradation of Triclosan in Water by Ultraviolet Light-activated Persulfate Process

Ultraviolet light-activated persulfate（ UV/PS） was studied to degrade TCSin water. The effects of UV-light intensity,PS concentration,initial pH value,coexisting anions( Cl^-,CO₃^2-) and humic acid（ HA） on degradation of TCS were studied. The results revealed that higher UV-lightintensity and PS concentration could enhance the reaction. Acidity condition was conducive to the TCS degradation. The degradation of TCS was a little inhibited by Cl^-,CO₃² -and HA. When the initial concentration of TCS was 5. 0 mg/L,UV-light intensity（I₀）was 9. 94 m W/cm²,PS concentration was 0. 6 mmol/L,the initial pH value is 7. 0,and reaction time was 120 min,the degradation rate of TCS in water reached 96. 6%.