Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder

Figure 5

Scanning electron microscopic images for 20 MHP (a), 35 MHP (b), 50 MHP (c), 20 MHPD (d), 35 MHPD (e), and 50 MHPD (f).

(a)

(b)

(c)

(d)

(e)

(f)