Polyphenol Removal from Sugarcane Juice by Using Magnetic Chitosan Composite Microparticles

摘要

An easy one-step co-precipitation method was adopted to prepare chitosan/Fe3O4 composite microparticles (MCTS). Scanning electron microscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometer, and X-ray diffraction were utilized to examine the features of the microparticles. The results showed that the microparticles had a honeycomb-like porous framework with superparamagnetic properties and a saturation magnetization of 43.4emug(-1). The adsorption performance of polyphenols in sugarcane juice with using MCTS as adsorbent was also investigated. The adsorption kinetics indicated that the polyphenol adsorption process was suitable for the pseudo-second-order mode, while the Langmuir isotherm mode could be employed to best show the adsorption behavior. According to the thermodynamic parameter values, this adsorption process is endothermic and spontaneous. Recycling experiments indicated that the MCTS adsorbent had considerable reusability.