基于带鱼骨的多孔羟基磷酸钙的制备及其对柴油的吸附动力学性能

为提高带鱼骨的利用率,以带鱼骨为原料,将其制备成多孔羟基磷酸钙,以期增加带鱼骨的附加值。带鱼鱼骨经过脱肉处理、粉碎后进行高温煅烧,分别对过筛目数、温度、时间进行单因素实验,通过比表面积测试,确定多孔羟基磷酸钙的最佳制备条件,并对其进行扫描电子显微镜检测、X射线衍射分析、红外光谱分析、紫外光谱分析等一系列表征,最后探讨了该多孔羟基磷酸钙对柴油的吸附性能。结果表明:带鱼骨的多孔羟基磷酸钙制备的最佳工艺为:煅烧温度800 ℃,时间为4 h,过500目筛。所制得的羟基磷酸钙孔穴疏松细密、比表面积增大,达到463.63 m²·g^-1,平均孔径分布为1.1~9.5 nm,属于介孔材料,其结构主要为六方晶系结构。吸附动力学实验表明,该多孔羟基磷酸钙对柴油具有良好的吸附性能,该吸附过程符合准二级动力学模型,平衡吸附量为69.93 mg·g^-1,初始吸附速率38.656 mg·(g·min^-1)^-1。

Preparation of Porous Hydroxyapatite from Trichiurus lepturus Fishbone and Its Adsorption Kinetics for Diesel Oil

In order to improve the utilization rate of Trichiurus lepturus bone, the fishbone was taken as material and prepared into porous hydroxyapatite to increase the added value of hairtail bone. The fishbone was treated by meat removal and wa scrushed, then calcined at high temperature. The single factor experiment was carried out on the mesh, temperature and time, respectively, and the optimum preparation process was determined by measuring the specific surface area. The porous hydroxyapatite was characterized by scanning electron microscope, X-ray diffraction, infrared spectroscopy and UV-visible spectroscopy, and its adsorption properties on diesel oil were investigated. The results showed that, the optimum process was as follows:The calcined temperature 800℃, the calcined time 4 h and the mesh 500. After calcination, the pore size of fishbone was loose, its specific surface area was increased to 463.63 m2·g-1, and the average pore size distribution was between 1.1~9.5 nm, which belonged to mesoporous material.Its structure was mainly hexagonal crystal structure. The adsorption kinetics experiments showed that the porous hydroxyapatite had good adsorption performance on diesel oil. The adsorption process was in accordance with pseudo-second-order kinetic model. The equilibrium adsorption capacity was 69.93 mg·g-1 and the initial adsorption rate was 38.656 mg·(g·min-1) -1.