Synthesis and Characterization of Hybrid-Magnetic Nanoparticles and Their Application for Removal of Arsenic from Groundwater

Figure 3

SEM images of MWCNTs (a) purified at 20000x and 50000x and (b) oxidized with HNO₃ at 20000x and 50000x. The scale in all figures is 300 nm.

(a)

(b)