749760.fig.005a
(a)
749760.fig.005b
(b)
749760.fig.005c
(c)
Figure 5: 𝑁 j s (rpm) versus concentration (%), at varying impeller geometries. (a) size of activated carbon: 1.40–2.36 mm, (b) size of activated carbon: 1.00–1.40 mm, (c) size of activated carbon: 0.75–1.00 mm.