期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：295
期号：3
页码：1-7
DOI：10.1088/1755-1315/295/3/032070
出版社：IOP Publishing
摘要：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.
