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Article Abstract
In this study, a novel fibrous chitosan biosorbent was prepared using LiOH/KOH/urea/HO (4.5:7:8:80.5 by weight) as spinning solvent. The fibrous chitosan exhibited a higher adsorption capacity and a faster adsorption rate for Co and Sr, compared with spherical chitosan due to its high specific surface area (16.9 m g), uniform fineness (24.1 μm), and good mechanical strength. The adsorption capacity of fibrous chitosan for Co and Sr was 31.3 mg g and 20.0 mg g, respectively, which was higher than that of spherical chitosan (22.5 mg gfor Co and 8.9 mg g for Sr). The coordination between -NH/-OH of chitosan and the nuclide ions was the rate-limiting step. The improvement of adsorption performance was due to the higher specific surface area which increased the exposure degree of functional groups (adsorptive sites). This new wet-spun fibrous chitosan biosorbent showed great potential in the adsorptive removal of nuclides ions from aqueous solution.
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| http://dx.doi.org/10.1016/j.scitotenv.2022.153998 | DOI Listing |
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