Degradation of Clofibric Acid in Aqueous Solution by Thermally Activated Persulfate
In order to study effective methods to degrade organic pollutants in water,thermally activated persulfate(PS) process was employed to remove clofibric acid(CA),one of the typical pharmaceuticals and personal care products.The influence of various factors,including initial CA concentration,persulfate dosage,pH,applied temperature and humic acid,on CA degradation by thermally activated PS process was investigated.Results showed that the degradation of CA was in accordance with the first-order reaction kinetics,and reaction rate constant decreased with the increase of the initial concentration of CA.The increase of the amount of persulfate was favorable to the degradation of CA in a certain range.With the increase of temperature,removal efficiency and reaction rate constant of the system increased rapidly.With the increase of humic acid dosage,removal efficiency of CA firstly increased and then decreased.When the pH from acidic to alkaline,and then to strong alkaline,degradation rate of CA had a tendency to slow down and speed up.
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