山竹壳合成贝壳粉负载纳米铁催化降解铬黑T

Mangosteen shell synthetic shell powder loaded nano iron catalytic degraded Eriochrome Black T

摘要:

以山竹壳提取液和贝壳粉制备了贝壳粉负载的纳米零价铁（MS-NZVI/SP），探究其催化铬黑T的类芬顿降解效果。采用SEM、XRD、FTIR等手段对制备的材料进行表征。结果表明，MS-NZVI/SP被成功制备，且呈均匀球状颗粒，表面覆盖了有机物多酚，具有较好的稳定性和重复使用性。通过单因素实验优化了MS-NZVI/S对铬黑T降解性能，得到优化条件为：贝壳粉与纳米零价铁负载质量比1∶1，温度35℃，溶液pH为3，投加4 mL过氧化氢，100 mg合成的材料。在优化条件下，铬黑T的降解效率可达到93.01%，其降解过程符合准二级动力学模型。

Abstract:

Shell powder loaded with nano-zero valent iron (MS-NZVI/SP) was prepared by mangosteen shell extract and shell powder and was used to investigate the Fenton-like degradation effect of eriochrome black T. The prepared samples were characterized by SEM, XRD and FTIR. The results showed that MS-NZVI/SP was successfully prepared and displayed uniform spherical particles. The surface of MS-NZVI/SP was covered with organic polyphenols. Furthermore, it had good stability and reusability. The degradation performance of eriochrome black T on MS-NZVI/SP was optimized by single factor experiments. The optimized conditions were as follows: loading mass ratio of shell powder to nano zero-valent iron of 1∶1, temperature of 35 ℃, pH of solution of 3, hydrogen peroxide dosage of 4 mL, synthetic material of 100 mg. Under these conditions, the degradation efficiency of eriochrome black T could reach 93.01%. The degradation process of eriochrome black T conformed to the quasi-secondary kinetic model.