Abstract
We investigated the occurrence in its water resource and the behavior of tefuryltrione and ipfencarbazone in drinking water purification system especially by coagulation sedimentation, sand filtration, ozonation, granular activated carbon (GAC) adsorption, chlorination and powdered activated carbon (PAC) adsorption. We confirmed that tefuryltrione and ipfencarbazone flow into the water source. Coagulation sedimentation and sand filtration were not applicable for tefuryltrione, but ozonation and chlorination were much effective and GAC adsorption was also effective, although the degree varied depending on the conditions such as water temperature and aging. Coagulation sedimentation, sand filtration, ozonation, chlorination were not applicable for ipfencarbazone, but GAC adsorption was much effective for it regardless of water temperature and space velocity. PAC adsorption was effective for tefuryltrione and ipfencarbazone regard injection rate. We confirmed that tefuryltrione and ipfencarbazone can be effectively removed by PAC adsorption or combination with ozonation and GAC adsorption.
