摘要
采用扫描电镜(SEM)和X射线衍射(XRD)对纳米零价铁(nZVI)做形态表征,考察不同实验条件下nZVI对水中Cr(Ⅵ)的去除效果,评价nZVI处理含铬污染废水的可行性。结果表明:溶液中H+会促进nZVI对Cr(Ⅵ)的去除,去除过程符合拉格尔格伦二级动力学模型,前10 min nZVI对Cr(Ⅵ)的去除率在96%以上,1 h后基本达到吸附平衡。nZVI对Cr(Ⅵ)的去除是先吸附后还原,并在nZVI颗粒表面形成Cr-Fe膜结构。实际电镀废水中nZVI投加量为20 g/L,反应1 h后水溶液中大部分重金属被去除。
In this paper, the effect of nanoscale zero-valent iron （nZVI） on the removal of Cr（Ⅵ） from wastewater was studied to evaluate the feasibility of the treatment. The nZVI was characterized by scanning electron microscope （SEM） and X-ray diffraction （XRD）. The result showed that H ＋ in the solution could promote the removal of Cr（Ⅵ） by nZVI, and the removal process was consistent with Lagergren pseudo-second-order adsorption kinetics. The removal efficiency was over 96% at the first 10 minutes by using nZVI, and the adsorption equilibrium could be achieved after 1 hour. The main mechanism of nZVI to remove Cr（Ⅵ） was adsorption, reduction and forming Cr-Fe membrane structure on the surface of nZVI. When the amount of nZVI in electroplating wastewater was 20 g/L, most of the heavy metals in the wastewater were removed after 1 hour of reaction.
作者
谢华俊
陈华林
张永普
周江敏
黄卉林
郑乾送
王晶晶
XIE Hua-jun;CHEN Hua-lin;ZHANG Yong-pu;ZHOU Jiang-min;HUANG Hui-lin;ZHENG Qian-song;WANG Jing-jing(College of Life and Environmental Science,Wenzhou University,Wenzhou,Zhejiang 325000,China)
出处
《环境监测管理与技术》
CSCD
2018年第5期68-71,共4页
The Administration and Technique of Environmental Monitoring
基金
浙江省公益技术应用研究基金资助项目(2016C33G2250007)
浙江省自然科学基金资助项目(LY17D010003
LY14D030001)
