Well-Dispersed Nanoscale Zero-Valent Iron Supported in Macroporous Silica Foams: Synthesis, Characterization, and Performance in Cr(VI) Removal

Figure 4

DF-STEM image (a) and the corresponding Si (b), O (c), and Fe (d) elemental maps of Mc-NZVI.

(a)

(b)

(c)

(d)