Fig. 11. Basic Green 1 color removal with time, using cellulose-based flocculation agents from different sources in dual system with bentonite at pH 3.0. Procedure A: 0.14 wt% of bentonite followed by 1.33 mg L−1 of flocculant. Procedure B: 0.14 wt% of bentonite and 4.0 mg L−1 of flocculant. Cationic synthetic PAM in dual system with bentonite was used as reference.
