【摘要】 采用液相还原法制备零价纳米铁粒子;用X射线衍射(XRD)和透射电镜(TEM)表征该样品的晶体结构、颗粒形貌与尺寸;研究温度、酸性品红初始浓度、纳米零价铁加入量及溶液pH值对零价纳米铁粒子脱除酸性品红的影响,并对酸性品红的脱除机理进行讨论。研究结果表明:纳米零价铁颗粒为球形,单个颗粒粒径小于100nm;纳米零价铁对酸性品红有很好的脱除作用,酸性品红的脱除率随温度的升高、纳米零价铁用量的增加以及酸性品红初始浓度的降低而逐渐增大;纳米零价铁对酸性品红有吸附和降解的双重作用,而以降解作用为主。更多还原

【Abstract】 Nanoscale zero valent iron particles were synthesized by reductive method in aqueous phase. The crystal structure,morphology and size of the particles were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The influence of temperature,initial acid fuchsine concentration,nanoscale zero valent iron dosage and pH on the removal of acid fuchsine by the particles was studied,and the removal mechanism of acid fuchsine was discussed. The results show that the obtained nanoscale zero valent iron particles are mostly in spherical shape with less than 100 nm in size. The acid fuchsine can be removed by nanoscale zero valent iron particles efficiently. The efficiency of removing acid fuchsine from solution is increased with increasing temperature and the dosage of nanoscale zero valent iron particles and decreasing initial concentration of acid fuchsine. The mechanism of removing acid fuchsine by nanoscale zero valent iron particles may include dual functions of absorption and degradation,and the degradation may play a major role in the reaction.更多还原