A Comparative Study of Raw and Metal Oxide Impregnated Carbon Nanotubes for the Adsorption of Hexavalent Chromium from Aqueous Solution

Figure 1

SEM images of CNTs with (a) 1% iron oxide (boxes indicate the iron oxide nanoparticles impregnated on CNTs), (b) 10% iron oxide, (c) 1% aluminum oxide, and (d) 10% aluminum oxide.

(a)

(b)

(c)

(d)