Promotion effect of Fe2+ and Fe3O4 on nitrate reduction using zero-valent iron

被引：134

作者：

Xu, Jiang ^{[1
]}

Hao, Zhiwei ^{[1
]}

Xie, Chunsheng ^{[1
]}

Lv, Xiaoshu ^{[1
]}

Yang, Yueping ^{[1
,2
]}

Xu, Xinhua ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Environm Engn, Hangzhou 310058, Zhejiang, Peoples R China

[2] Zhejiang Chimey Environm Sci &Technol Co Ltd, Hangzhou 310030, Zhejiang, Peoples R China

来源：

DESALINATION | 2012年 / 284卷

关键词：

Zero-valent iron; Fe2+; Reductive denitrification; Nitrate; CHEMICAL REDUCTION; DRINKING-WATER; PH; KINETICS; DENITRIFICATION; NITRITE; POWDER;

D O I：

10.1016/j.desal.2011.08.029

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The reductive efficiency of nitrate by zero-valent iron (Fe-0) was increased under initial neutral conditions through addition of certain amount of Fe2+. Throughout the process, the NO3- and Fe2+ concentrations displayed a declining trend, but the general process was divided into three stages. It showed that Fe2+ could accelerate the corrosion of iron surface, accompanied by generating Fe3O4, and ionizing H+ which played an important role in buffering pH of the system. Fe3O4 behaved as a good conductor which favored the electron transfer on iron surface and accelerated the reductive denitrification rate of nitrate with Fe and Fe2+. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：9 / 13

页数：5

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