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Synthesis and characterization of a novel microcrystalline cellulose-based polymeric bio-sorbent and its adsorption performance for Zn(II)
- Wang, Aili, Li, Shuhui, Chen, Hou, Hu, Yanping, Peng, Xiong
- Cellulose 2019 v.26 no.11 pp. 6849-6859
- Fourier transform infrared spectroscopy, adsorbents, adsorption, biosorbents, cellulose, differential scanning calorimetry, emulsions, heavy metals, industrial wastewater, ionic liquids, kinetics, light scattering, models, polymers, sorption isotherms, thermogravimetry, zinc
- The adsorption of heavy metal ion Zn(II) from industrial wastewater by performing environmentally benign methods is particularly important. In this study, a novel microcrystalline cellulose-based polymeric bio-sorbent (MCC-g-polyIL), which contained specific poly(ionic liquid) structure and adsorption performance for Zn(II), was in situ ARGET ATRP-synthesized within ionic liquid microemulsions. The ionic liquid microemulsions were characterized by phase formation capacity and dynamic light scattering results, and the prepared MCC-g-polyILs were characterized by FTIR, ¹HNMR, and TG/DSC analyses. The optimization of the adsorption process indicates that both the molar ratio of double ionic liquids and the dosage of the adsorbent affected the adsorption capacity of MCC-g-polyILs toward Zn(II). The research on adsorption kinetics and adsorption isotherms further reveals that the adsorption process follows the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model. The designed MCC-g-polyILs exhibited enhanced adsorption capacity, which indicates promising practical applications for the removal of Zn(II) from industrial wastewater.