Table 2.

Elemental composition of the SF flocs.

Elements	SF flocs, before ionic flocculation (%)	SF flocs, after ionic flocculation (%)
C	67.00	78.90
Ca	22.50	6.30
O	10.10	14.20
Cu	0.30	0.00
Si	0.10	0.10
Cl	0.00	0.50
Total	100	100