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|Title:||Preparation and characterization of chitosan encapsulated Sargassum sp. biosorbent for nickel ions sorption|
Paul Chen, J.
|Citation:||Yang, F., Liu, H., Qu, J., Paul Chen, J. (2011-02). Preparation and characterization of chitosan encapsulated Sargassum sp. biosorbent for nickel ions sorption. Bioresource Technology 102 (3) : 2821-2828. ScholarBank@NUS Repository.|
|Abstract:||A new biosorbent - Sargassum sp. encapsulated with epichlorohydrin (ECH) cross-linked chitosan (CS) was investigated for nickel ions removal. The prepared biosorbent with Sargassum sp. to cross-linked chitosan of 3 (weight ratio) had the highest sorption capacity. The biosorption kinetics can be well fitted by the diffusion-controlled model. The organic leaching of CS was 77-88% less than that of algae at different pH. The biosorption capacity of nickel on CS was much higher than that of cross-linked chitosan (CLC) bead and lower than that of raw algae due to encapsulation. In addition, the reusability of CS was further evaluated and confirmed through five adsorption-desorption cycles. Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the nickel ions sequestration mechanism included ion exchange and nickel complexation with the carboxyl, amino, alcoholic and ether groups in CS. © 2010 Elsevier Ltd.|
|Source Title:||Bioresource Technology|
|Appears in Collections:||Staff Publications|
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