Abstract
resin-like odor observed in tap water from Kawasaki City was investigated using gas chromatography with an odor-sniffing technique. The study estimated that 1-Hexen-3-one is the causative agent, which originates from diatoms such as the genus Aulacoseira found in raw water at the water purification plant. 1-Hexen-3-one was detected in a sample in which Aulacoseira granulata var. angustissima was mono-cultured from raw water and subsequently the cells were disrupted by ultrasonic waves. Furthermore, the concentration of 1-Hexen-3-one increased due to chlorination. Therefore, it was decided to develop a test method to determine the formation potential of 1-Hexen-3-one as an indicator for monitoring raw water. Regarding the control of odor, 1-Hexen-3-one was confirmed to be removed by powdered activated carbon. It should be noted that 1-Hexen-3-one is likely to be removed equivalently or less compared with 2-methyl-isoborneol.
