纳米零价铁去除水中硝酸盐氮研究进展  

Research Progress on Removal of Nitrate Nitrogen in Water by Nano-Zero-Valent Iron

作　　者：杨笑颜 余凡 Yang Xiaoyan;Yu Fan(School of Environmental and Municipal Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]华北水利水电大学环境与市政工程学院,河南郑州450046

出　　处：《山东化工》2024年第6期136-138,共3页Shandong Chemical Industry

摘　　要：水中硝酸盐氮(NO_(3)^(-)-N)的危害对人类健康和生态环境构成了严重威胁,纳米零价铁(nZVI)可以通过化学反应反硝化技术快速去除水中NO_(3)^(-)-N,但nZVI自身易团聚,表面活性颗粒不稳定,所以在NO_(3)^(-)-N还原过程中存在着氮气(N_(2))的选择性较低、NO_(3)^(-)-N去除率不理想的问题。通过对nZVI去除NO_(3)^(-)-N技术的归纳总结,探讨了nZVI在还原NO_(3)^(-)-N的基本原理,影响因素和提高去除效率和N_(2)选择性的改性方法。通过负载纳米材料,表面活性剂及添加还原剂等,NO_(3)^(-)-N去除率和N_(2)选择性都会得到不同程度上的提高。不同的改性方法对nZVI的改性效果不同,也决定了nZVI复合材料对NO_(3)^(-)-N的去除作用及氮气选择性提升。The harm of nitrate nitrogen(NO_(3)^(-)-N)in water poses a serious threat to human health and ecological environment.Nano-zero-valent iron(nZVI)can quickly remove NO_(3)^(-)-N in water by chemical reaction denitrification technology,but there are problems such as low selectivity of nitrogen(N_(2))and unsatisfactory removal rate of NO_(3)^(-)-N.The basic principle,influencing factors and modification methods to improve the removal efficiency and N_(2) selectivity of nZVI in the reduction of NO_(3)^(-)-N were discussed by summarizing the removal technology of nZVI.By loading nanomaterials,surface activators and reducing agents,the NO_(3)^(-)-N removal rate and N_(2) selectivity will be improved to varying degrees.Different modification methods have different modification effects on nZVI,which also determines the removal of NO_(3)^(-)-N by nZVI composites and the improvement of nitrogen selectivity.

关 键 词：纳米零价铁 硝酸盐氮 影响因素 改性方法 

分 类 号：X703[环境科学与工程—环境工程]