山竹壳合成贝壳粉负载纳米铁催化降解铬黑T

Preparation of mangosteen shell synthetic shell powder loaded nano iron and its degradation of Eriochrome Black T

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/SP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(质量分数5%),100 mg合成的材料。在优化条件下,铬黑T(50 mg/L)的降解效率可达93.01%,其降解过程符合准二级动力学模型。

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(mass fraction of 5%) dosage of 4 m L, synthetic material of 100 mg. Under these conditions, the degradation efficiency of Eriochrome Black T(50 mg/L) could reach 93.01%. The degradation process of Eriochrome Black T conformed to the quasi-secondary kinetic model.