487037.fig.008a
(a)
487037.fig.008b
(b)
487037.fig.008c
(c)
487037.fig.008d
(d)
487037.fig.008e
(e)
Figure 8: The SEM micrographs of silica fume and sewage sludge incinerated at 500–950°C hydrothermally treated with lime at 100°C for 16 hrs.