零价铁修复硝酸盐污染水体的研究进展  

HEADWAY ON APPLICATION OF ZERO VALENT IRON IN REHABILITATING WATER BODY CONTAMINATED BY NITRATE

作　　者：乔俊莲[1] 郑广宏[1] 闫丽[1] 杨健[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092

出　　处：《水处理技术》2009年第6期6-10,共5页Technology of Water Treatment

摘　　要：零价铁化学还原硝酸盐的现象很早就发现,其作为高效、经济的反硝化技术,相应研究与应用倍受关注。在硝酸盐化学还原过程中,溶液pH、Fe0比表面积浓度、铁表面状态、溶液离子、溶解氧、以及共存微生物等影响反应过程。根据反应条件不同,硝酸盐还原产物为氨、氮气、亚硝酸盐,以及少量氮氧化物。其中,氮气是最希望的还原产物,选择性获得氮气是今后的研究方向之一。There have been some reports on phenomenon that nitrate in water can be chemically reduced by zero-valent iron （Fe^0） early. Nowadays, several studies have demonstrated that process is feasible and reliable. Meanwhile, lots of reports also get much attention that have mainly focused on mechanism of chemical nitrate reduction and the application in rehabilitating groundwater in situ or ex situ. It is gradually recognized the fundamental process of chemical nitrate reduction is influenced by some factors such as pH, specific surface area concentration, surface condition of Fe^0, ions in solution, dissolved oxygen as well as microorganism probably. Each factor has relative connection with one another, and continuous changes of the micro-niche on iron surface may also have some effect on the selection to recovery. Nevertheless, it is reported that ammonia, nitrogen gas, nitrite are main nitrate recoveries as well as small amount of gaseous oxo-nitrogen compound. During these nitrogenous compounds, it is desired that quantity of nitrogen gas account for a large portion due to its property of friendly to environment. At the same time, it is an intriguing and promising to have nitrogen gas produced as main species selectively.

关 键 词：零价铁 硝酸盐 化学还原 

分 类 号：X52[环境科学与工程—环境工程]