摘要
对零价铁(Fe0)化学反硝化法脱除水中NO-3的原理及其影响因素进行了全面综述,并提出了未来的研究方向。Fe0化学反硝化NO3-的含氮产物在酸性条件下以NH4+为主,中性条件下以N2为主。pH是影响Fe0还原硝酸盐的主要因素,Fe0/NO3-负荷、Fe0的投量、搅拌强度等影响着反硝化速率,溶解氧基本不影响反硝化进程,而不同的共存离子则分别对反硝化过程起着不同的作用。仅用Fe0还原NO-3的效率较低,采用辅助手段的Fe0还原NO-3新技术将成为未来的研究方向。
The mechanisms and affecting factors of nitrate reduction by zero-valent iron （ Fe^0） are reviewed, and the possible research topics in future are proposed. The dominating products of chemical denitrification by Fe^0 are NH4^＋ and N2 under acidic conditions and under neutral conditions, respectively. Among the factors affecting denitrification by Fe^0, pH is the most important one, Fe^0/NO3^- loading rate, Fe^0 dosage and mixing intensity are factors influencing denitrification rate while dissolved oxygen concentration has little effect on denitrification. Different co-existing ions have different effects on denitrification by Fe^0. Since the efficiency of dinitrification by Fe^0 is low, new technologies assisted with other methods will be the hot topics in future.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第14期5-9,共5页
China Water & Wastewater
基金
哈尔滨工业大学优秀青年教师培养计划项目(HITQNJS.2007.038)
关键词
零价铁
硝酸盐
化学反硝化
影响因素
zero-valent iron
nitrate
chemical denitrification
affecting factors
