油茶籽壳磁性碳微球的制备及其对PFOS的吸附性能

发布时间：2018-04-03 13:44

本文选题：油茶籽壳　切入点：水热法　出处：《环境工程》2017年11期

【摘要】：采用废弃生物质油茶籽壳为碳源,对比不同的Fe_3O_4@C微球修饰方法,以水热法制备了分散性良好,碳层厚度均匀的核壳结构Fe_3O_4@C磁性微球,并使用透射电镜(TEM)、红外光谱(FT-IR)及X射线衍射(XRD)对其进行了表征,研究了该磁性微球对水体中持久性有机污染物PFOS的吸附性能。Fe_3O_4@C磁性微球吸附PFOS仅需约1 h即可达吸附平衡,其吸附动力学更符合拟一级动力学模型(R~20.95);Langmuir吸附模型能较好地拟合其等温吸附数据(R~20.98),表明Fe_3O_4@C磁性微球对PFOS的吸附为化学吸附占主体作用,倾向于单层吸附,对PFOS的吸附容量为11.61 mg/g。该吸附剂具有良好的磁性能及吸附性能,对水体中PFOS吸附迅速且易于回收,为废弃生物质的高值开发提供了一种可能路径。
[Abstract]:The core-shell core-shell Fe_3O_4@C magnetic microspheres with good dispersion and uniform carbon layer were prepared by hydrothermal method by comparing with different modification methods of Fe_3O_4@C microspheres by using waste biomass camellia seed shell as carbon source.It was characterized by transmission electron microscopy (TEM), FTIR (FT-IR) and X-ray diffraction (XRD). The adsorption performance of the magnetic microsphere for PFOS in water was studied. The adsorption equilibrium of PFOS adsorbed by Fe3O4C magnetic microspheres was only about 1 h.The adsorption kinetics is in better agreement with the pseudo-first-order kinetic model RP20.95 / Langmuir adsorption model, which can fit the isothermal adsorption data well. It shows that the adsorption of Fe_3O_4@C magnetic microspheres on PFOS is mainly chemisorption and tends to monolayer adsorption, and the adsorption capacity for PFOS is 11.61 mg / g.The adsorbent has good magnetic properties and adsorption properties, and the adsorption of PFOS in water is rapid and easy to recover, which provides a possible way for the development of high value waste biomass.
【作者单位】：南昌航空大学环境与化学工程学院;
【基金】：国家自然科学基金项目(21366024,21665018,21165013) 江西省自然科学基金(20151BAB213002) 南昌航空大学研究生创新专项资金项目(YC2015014)
【分类号】：TQ424;X52

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