粉末碳负载纳米铁去除水中橙黄G的研究  

Study on Removal of Orange G in Aqueous Solution Using Carbon Powder Supported Nanoscale Zero-valent Iron Particles

作　　者：潘峰[1] 尤奇中[1] 王万峰[1] 刘林[1] 杨利敬[1] 

机构地区：[1]河南师范大学环境学院黄淮水环境与污染防治教育部重点实验室,新乡453007

出　　处：《科学技术与工程》2013年第24期7126-7130,共5页Science Technology and Engineering

基　　金：国家自然科学基金项目(51208184);河南省科技厅基础与前沿技术研究项目(122300410289);河南省教育厅科学技术研究重点项目(13A610585);河南省科技创新人才计划(134200510014)资助

摘　　要：采用了液相还原法制备碳负载纳米铁。研究了不同处理条件下,粉末碳负载纳米铁对水体中偶氮染料橙黄G的去除特性;并初步探讨了反应机理。结果表明,在试验所采用的橙黄G浓度范围内,碳负载纳米铁对橙黄G的去除率明显高于纳米铁和粉末碳;且去除率随橙黄G初始浓度的增高、负载纳米铁投加量的增加、pH的降低和温度的升高而增大。通过扫描电镜图谱表征分析发现,粉末碳负载纳米铁的高分散性及其表面微小原电池的形成是加速水中橙黄G去除的关键因素。Carbon-supported zero-valent nano-iron particles （C-nNZVI）was prepared by liquid phase reducing method. The influence of prepared C-nNZVI pretreated in different conditions on the removal characteristics of azo dyes orange G in water was studied, and the reaction mechanisms was also preliminary discussed. The results showed that, the removal rate of C-nNZVI on Orange G within the concentration range was significantly higher than that of nano-iron and carbon powder. And the removal rate on the orange G increased when the initial concentration of load nano iron increased, pH decrease and temperature rose. The analysis of spectrum characterization from scanning electron microscopy indicated that the high dispersibility of C-nNZVI and the formation of micro galvanic cells on the C-nNZVI surface were the key factors to accelerate the removal rate of orange G in water.

关 键 词：粉末碳 负载 纳米铁 橙黄G 

分 类 号：X703[环境科学与工程—环境工程]