Figure 3.
The graph shows X R D intensity on the vertical axis plotted versus two theta degrees on the horizontal axis, ranging from about 5 to 90. Three diffraction patterns are presented for C F sludge, L D sludge, and C R sludge. The C F sludge pattern shows low intensity peaks labelled F e O and F e O O H at lower angles and Fe O around mid angles. The L D sludge pattern shows multiple higher intensity peaks labelled F e O O H, F e O, S i O 2, and Fe at angles mainly between about 25 and 60, with a dominant Fe peak near the mid range. The C R sludge pattern shows several distinct peaks labelled F e 2 O 3 across angles from about 25 to 60, with lower background intensity compared to the other patterns.Waste sludge analysis by way of XRD reveals distinct peaks