Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Figure 3

SEM images of (a) rice husk biochar prepared at 400°C, (b) rice husk biochar prepared at 500°C, (c) rice husk biochar prepared at 600°C, and (d) rice husk biochar prepared at 500°C after being used as supplemented plant root for 47 days.

(a)

(b)

(c)

(d)