At a fixed initial dye concentration of 200 mg L1 and a pH of
10.5, the removal of SB15 and SBGD increased from 20.8% to
31.8% and from 29.8% to 57.4%, respectively, by increasing the
GA-CB dose from 0.75 to 20.6 g L1 at 30 C (Fig. 6a). However,
was effective.
after a dose of 3.6 g L1, there was no considerable change in dye
removal. For SBGD with the same biosorbent dose, both the
biosorption capacity (qe) and dye removal (D) were higher than
for SB15. This can be explained by the differences in the sulfur
dye structures (Fig. 1). SB15 has amino and hydroxyl groups like