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Authors: Lu S, Yang F, Tian CY, Shi P, Liu XY, Bao ZB, Nie JM
Article Title: Sorption Properties of Ion-imprinted Seaweed-Chitosan Composite Adsorbents for Nickel Ions.
Publication date: 2019
Journal: IOP Conference Series: Earth and Environmental Science
Volume: 295
Issue: (3)
Article Number: 032070.
DOI: 10.1088/1755-1315/295/3/032070
Abstract: A granulated biosorbent-Ni-SC (Ni2+ ions imprinted seaweed-chitosan) was made by seaweed powder encapsulated with cross-linked chitosan and ion-imprint technology in this study. Ni-SC and granulated SC biosorbent (without ion-imprint technology) were investigated for nickel ions removal. The maximum nickel adsorption capacity of Ni-SC and SC were both achieved at pH 7.0 and the capacity of Ni-SC was higher than that of SC. The diffusion-controlled model and pseudo-second-order model were used to fit the adsorption kinetics data. The adsorption capacity of Ni-SC was higher than that of SC during the whole kinetics process. Also the adsorption isotherm study showed that the maximum adsorption capacity of Ni-SC (0.99 mmol g-1) was higher than that of SC (0.41 mmol g-1). The Thomas model can well describe the dynamic adsorption observations and the maximum column adsorption capacity qmax was 0.24 mmol g-1
Template and target information: nickel ion, Ni(II)
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