Abstract
Treatment characteristics of wastewater containing PFCs by pulsed water-surface discharge system were investigated. PFOA and PFOS were used as examples of PFCs because these PFCs are recalcitrant and often detected in the environment. Pulsed water-surface discharge system can decompose and mineralize not only PFOA but also PFOS which is more stable than PFOA and can not be degraded by OH radical. Applied electric pressure and frequency can affect on the treatment efficiency, and their increase can enhance the efficiency. The efficiency can be raised by PFCs concentration, and identically-distributed discharge to water surface is also required for higher treatment efficiency. NaCl concentration of less than 1mg/L in wastewater does not give any negative effects, which indicate applicability to leachate treatment from landfill site of wastes. It is suggested that the pulsed water-surface discharge system can degrade PFOS in wastewater much more efficiently than the treatment system with UV irradiation.
