4-chlorophenol oxidation combined with the application of advanced oxidation technology and the modified microwave in chemical and petrochemical wastewater industry

background: there are many varieties of compounds in chemical and petrochemical wastewater. one of the important members of the chlorophenols (cps) family is ρ-chlorophenol. this pollutant is introduced into the environment through various human activities such as waste incineration, uncontrolled use of wood preservatives, pesticides, fungicides and herbicides, as well as via bleaching the pulp with chlorine, chlorination of drinking water and wastewater. experiments with microwave irradiation were carried out in a modified domestic microwave oven with the cooling system (2450mhz, samsung co.). the oxidation rate was influenced by many factors, such as the ph value, the amount of hydrogen peroxide, the irradiation time, the initial concentration of organic material and the microwave power.   the result showed that the optimum conditions obtained for the best degradation rate was ph=10.5, the h 2 o 2 concentration of about 0.1 mol/l and the microwave irradiation power of about 600w for the microwave/h 2 o 2 system at constant ρ-chlorophenol concentration. the degradation of ρ-chlorophenol by different types of oxidation processes were followed by the first order rate decay kinetics. the energy consumption for uv/h 2 o 2 in degradation of p-chlorophenol (93%) and the reaction time of 180 min was 17460 kwh/kg p-chlorophenol removing.   key words : advanced oxidation photochemical, 4-chlorophenol, mw radiation, hydroxyl