To make the flow visible, Uranin
was utilized as a dye marker, and the dye was released slowly from the slits flush-mounted on both leading edges of the plate.
It is also marketed with the other names like fluorescein or its sodium salt, uranin
and D and C Yellow#8.
This study therefore first identified the processes controlling the transport of an uranin (sodium fluorescein: [C.sub.20][H.sub.10][Na.sub.2][O.sub.5]) plume in a heterogeneous aquifer by evaluating field-measured breakthrough curves (BTCs) and then modeled the variation of velocity and retardation factor of the plume.
As a reactive solute, 2 kg of uranin ([C.sub.20][H.sub.10][Na.sub.2][O.sub.5]), dissolved in 4500 L of groundwater, was injected at 6-7 m below the ground surface during a period of 5 h.
Values for water temperature ([degrees]C), water fluorescenee (fluorescence equivalent to uranin
density, [micro]g/L), salinity (psu, practical salinity unit), and turbidity (equivalent to kaolin density, ppm) were obtained for 0.1-m intervals from unpublished data at the Abashiri Local Office of the Hokkaido Development Bureau.