Treatment of Wastewater Containing Disused Extractant by Advanced Oxidation Processes

The spent fuel can be treated by solvent extraction. In the process of extraction, the performance of the extraction will be serious deterioration by the effect of radioactive radiation, chemical reaction, light and heat, it will be a new waste and harm human being and pollute environment seriously. In this paper, four different advanced oxidation processes (UV/H2O2,UV/Fenton,O-3 and O-3/Fenton)were used to treat the wastewater containing extractant. All of these four methods, at presumed conditions, could result in high COD removal efficiencies, and the removal rate of COD reached 80% or above when the wastewater was treated 3 hours.When the wastewater was treated by pretreatment/O-3/Fenton, the COD and removal efficiency of the effluent were 247mg/L,94.5% respectively, at the O-3 dose of 1000 mg/L with 72 ml/L H2O2.