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Novel nanoporous magnetic cellulose−chitosan composite microspheres (NMCMs) were prepared by sol−gel transition method using ionic liquids as solvent for the sorption of Cu(II). The composite microspheres were studied by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and vibrating sample magnetometry (VSM). Subsequelty, the adsorption of Cu(II) to NMCMs was investigated systematically with varried parameters such as pH, contact time, and initial concentration. Results revealed that the composite microspheres exhibited efficient adsorption capacity of Cu(II) from aqueous solution, due to their favorable chelating groups in structure. The adsorption process was best described by a pseudo-second-order kinetic model, while isotherm modeling revealed that the Langmuir equation better describe the adsorption of Cu(II) on NMCMs as compared to Freundlich model. Moreover, the loaded NMCMs can be easily regenerated with HCl and reused repeatedly for Cu(II) adsorption up to five cycles. The environmental friendly microspheres were expected to be a promising candidate for future practical use in heavy metal ions removal.

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BackgroundIn the present study, the phenolic compounds were prepared using ultrasonic-aid extraction from sugar beet molasses (SBM).MethodsGallic acid (GA), cyanidin-3-O-glucoside chloride (CGC) and epicatechin (EP) were produced after column chromatography from the extraction, and further detected using NMR, QTOF-MS and ESI-MS/MS.ResultsThe three compounds exhibited strong antioxidant activities including DPPH radical scavenging activities, ABTS radical scavenging activities and ORAC values. GA showed the strongest antioxidant activity. Antitumor activities significantly increased in a dose-dependent manner. In particular, the CGC had growth inhibitory activities of 94.86, 87.27 and 67.13 % against the human colon (CACO-2), hepatocellular (HepG2) and breast (MCF-7) carcinoma cell lines, respectively, at the highest concentration of 400 μg/mL of the extracts. These results suggest that the three compounds are key chemical compositions valuable for preparing functional foods in the food industry.ConclusionsThe results suggested that SBM is a natural source of antioxidant and antitumor agents for preparing functional foods.

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