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以氧氯化锆和硅酸钠的盐溶液为原料,采用共沉淀法制备了硅-锆复合的新型除氟材料(Si-Zr),利用SEM、FTIR和XRD分析了其表面形态和内部结构特征,并研究了相关的制备参数对材料除氟性能的影响。结果表明,600℃高温焙烧条件下的新型Si-Zr表面孔隙结构发达,比表面积大,有利于材料对氟离子的吸附;材料中Zr与Si以Si—O—Zr复合氧化物的形态结合,其性质结构稳定,对氟离子吸附后不易脱附。在制备参数中,焙烧温度、硅与锆摩尔比和焙烧时间对材料除氟性能的影响较大。
A novel silicon-zirconium composite de-fluoride material (Si-Zr) was prepared by coprecipitation method using a solution of zirconium oxychloride and sodium silicate as a raw material. The surface morphology and internal structure of the alloy were analyzed by SEM, FTIR and XRD. Characteristics, and studied the impact of the relevant preparation parameters on the performance of fluoride removal. The results show that the pore structure of the novel Si-Zr surface is developed at 600 ℃, and the specific surface area is large, which is favorable for fluoride ion adsorption. Zr and Si are combined with Si-O-Zr complex oxide in the material, Its structure is stable in nature, difficult to desorption of fluoride ion adsorption. In the preparation parameters, the calcination temperature, molar ratio of silicon to zirconium and roasting time have a great influence on the fluoride removal performance of the material.