Abstract
Regenerated cellulose (RC) recovered from cellulose dissolution waste liquid was used as absorbent for dye wastewater treatment. The RC presents a uniform flake-like structure with abundant carboxyl groups, which enable its excellent adsorption selectivity for cationic dyes. The maximum adsorption capacities of 398.41 and 367.65 mg·g−1 for crystal violet and methylene blue, respectively could be achieved. The kinetic study suggested the adsorption followed the Pseudo-second-order and is a chemical adsorption. The thermodynamic behavior of RC absorbent indicated that the adsorption process was endothermic.Additionally, the RC absorbent possesses excellent recyclability. It could maintain relatively high adsorption capacity after four cycles.
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