Highly efficient and sustainable alginate/carboxylated lignin hybrid beads as adsorbent for cationic dye removal
발표자
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초록
내용
From the viewpoint of the application of these lignin polymers, the application as a biosorbent for water treatment material is increasing its interest due to the abundance of raw materials and reactive functional groups including hydroxyl groups. In this study, carboxylated lignin(C-Lig) was prepared by chemical modification of kraft lignin(KL). Thereafter, through the alginate (Alg) encapsulation strategy, bead-type Alg/C-Lig hybrid adsorbents were successfully fabricated. The optimum Alg/C-Lig blend ratio for effective adsorption performance and a stable batch type dye removal process was found to be 50:50. Alg/C-Lig hybrid beads showed excellent 555 mg/g of maximum MB removal capacity within a 6h fast adsorption process. From the adsorption isotherm, kinetics and thermodynamic behavior analysis, “electrostatic attraction-based surface adsorption and internal diffusion” was identified as the main MB removal mechanism.