Figure 2

(a) XRD and (b) FT-IR analyses of all OMs, before (light) and after Cs adsorption (bold); and SEM–EDS analyses of the (c) acid-activated, and (d) base-activated, opaline mudstones after Cs adsorption.

(a) XRD and (b) FT-IR analyses of all OMs, before (light) and after Cs adsorption (bold); and SEM–EDS analyses of the (c) acid-activated, and (d) base-activated, opaline mudstones after Cs adsorption.