Figure 4
From: Removal of Cr(VI) by biochar derived via co-pyrolysis of oily sludge and corn stalks
SEM images of CS (a), OS (b), OS-CS AC (c), and OS-CS AC after removal of Cr(VI) (d).
Figure 4 | Scientific Reports
From: Removal of Cr(VI) by biochar derived via co-pyrolysis of oily sludge and corn stalks
SEM images of CS (a), OS (b), OS-CS AC (c), and OS-CS AC after removal of Cr(VI) (d).
