磁性埃洛石纳米管的制备及其类芬顿降解废水中亚甲基蓝的研究

Study on preparation of magnetic halloysite nanotube and Fenton-like degradation of MB in wastewater

以埃洛石纳米管为载体,采用共沉淀法制备磁性埃洛石纳米管复合材料。利用X射线衍射、红外光谱和透射电镜对所得样品的物理结构和性质进行表征,对所得磁性样品进行磁性测定。以含有亚甲基蓝的废水为研究对象,利用磁性埃洛石纳米管进行类芬顿降解的研究,考察了不同降解条件的影响。结果表明:选用磁含量为33%的样品,用量为1g/L,在反应温度为30℃,废水中亚甲基蓝的浓度为100mg/L,H;O;投加量为15mL,显示较好的类芬顿降解性能。进一步提高样品用量,可以提高废水中亚甲基蓝的降解率,并且随着溶液pH的升高,降解率不断增加,表明磁性样品适应较宽广的废水pH范围。

Using halloysite nanotubes as a carrier, a magnetic halloysite nanotubes composite material was prepared by a co-precipitation method.The physical structure and properties of the obtained samples were characterized by XRD,FT-IR and TEM,and measured the magnetic properties of the samples.Taking the wastewater containing methylene blue(MB) as the research object, the nanotubes were used to study Fenton-like degradation, and investigated the effects of different degradation conditions.The results showed that a sample with a magnetic content of 33%,a dosage of 1 g/L,a reaction temperature of 30℃,a concentration of MB in the wastewater of 100 mg/L,and a dosage of 15 mL of H;O;,showed good Fenton-like degradation performance.Further increasing the amount of sample can increase the adsorption degradation rate of MB in wastewater, and the degradation rate continued to increase as the pH of the solution rised, indicating that the magnetic sample was suitable for a wide range of wastewater pH value.