Performance of photoelectro-oxidation process on the degradation of organic pollutants in drinking water
In view of the present situation of organic pollutants in surface water and the problem that these organic pollutants cannot be effectively removed by the conventional water treatment technology,a deep end water treatment technology based on ultraviolet(UV)irradiation with electrochemical technology was proposed for dual water supply.Compared with electrolysis or UV irradiation alone,photoelectro-oxidation process coupled with UV irradiation could increase the degradation rates of ibuprofen,atrazine,trichloroacetic acid and dimethoate to 92.5％,98.1％,71.0％and 94.6％in 15 min,respectively,and could reduce the energy consumption.The increase of current and light intensity accelerated the degradation of organic pollutant by photoelectro-oxidation process.However,the initial concentration of pollutants、Cl-、HCO3- and organic matter(HA)were inversely proportional to the removal rates of these pollutants.Moreover,ibuprofen was taken as the representative pollutant,its intermediate products were determined and their toxicity changes were calculated.It was found that photoelectron-oxidation significantly reduced the toxicity of ibuprofen.
photoelectro-oxidationdrinking water treatmentorganic pollutantsibuprofentoxicity calculation
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