Hydrogeochemical investigation of colloid and trace elements by using quality-controlled sample at Mizunami Underground Research Laboratory

Iwatsuki, Teruki  ; Omori, Kazuaki; Shingu, Shinya

Ultra-filtration for deep groundwater in Mizunami Underground Research Laboratory were carried out to estimate interaction between colloid particle and trace elements. Groundwater sample was collected from fracture of drift wall by using batch tank. The result shows that the colloid particles consist of organics, silicate minerals, ferric hydrates with size of 0.2 micron meter-50 kDa or under 10kDa.