Preparation and Characterization of Chitosan/Bentonite Composites for Cr (VI) Removal from Aqueous Solutions

Figure 14

Desorption-regeneration cycles. (Absorbent dosaging, 400 mg/L; pH value, 3.0; initial concentration, 10 mg/L; temperature, 298.15 K; contact time, 90 min; rpm, 180).