Preparation of Sweet-potato Starch Microspheres and Its Application to the Removal of Cu2+ in Wastewater
Starch microspheres were prepared by inverse cross linking-emulsion method with sweet potato starch as raw material,Span 60 and tween-60 as emulsifiers,and N,N-methylene bisacrylamide (MBAA) as crosslinking agent.Their functional groups were characterized by Fourier transform infrared spectroscopy (FT-IR),the morphologies of starch microspheres were observed by the scanning electron microscopy (SEM),and their specific surface areas and pore sizes were also tested.The optimum condition for the removal of Cu2+ were investigated by simulation wastewater.Results showed that the structure of sweetpotato starch microsphere was fit to adsorb Cu2+ and when the mass concentration of microphere was 0.12 g · mL-1,and the adsorption time was 45 min,the adsorption effect was the best.The adsorption test of Cu2+ in Xi'an Seoul lake water was carried out under the optimum condition,and the removal rate reached to 82.45％.
starch microspherescross-linking preparationadsorption of Cu2 +
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