About the Dependence of Breakthrough Curves on Flow Direction in Column Experiments of Transport across a Sharp Interface Separating Different Porous Materials

Table 1

Characteristics of the glass beads used for the experiments.

Type	Set code	Diameters of microspheres (in μm)	Porous material	Seller
Fine	FF	70 to 110	Sodium glass tempered beads	Lampugnani Sabbiatrici
Fine	F	200 to 300	Sodium glass tempered beads	Lampugnani Sabbiatrici
Coarse	C	300 to 400	Sodium glass tempered beads	Lampugnani Sabbiatrici
Coarse	CC	1000	Borosilicate glass beads	Sigma-Aldrich