749760.fig.0014a
(a)
749760.fig.0014b
(b)
749760.fig.0014c
(c)
Figure 14: 𝑆 values 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, and (c) size of activated carbon 0.75–1.00 mm.