Fig. 3
From: Performance evaluation of 3D-printed geopolymer monoliths for cadmium adsorption
SEM images of the bead and monolith: a geopolymer bead, b internal porous surface of the bead, c 3D printed geopolymer monolith, d internal porous surface of the monolith, e overview of the 3d printed monolith, f cross section of the monolith.
