Figure 5From: Distribution of U and REE on colloids in granitic groundwater and quality-controlled sampling at the Mizunami underground research laboratory Size-fractionated concentrations of U and colloid-forming elements from the boreholes. Concentrations of U (inverted triangles), Fe (squares), and Al (circles) during groundwater exchange in the (a) 09MI20 and (b) 10MI26 boreholes.Back to article page