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题名: 溶液中Fe~(2+)强化Fe~0还原NO_3~-的机制
作者: 陈占; 王海波; 韩陆超; 胡学香; 赵丹
刊名: 环境工程学报
出版日期: 2016
卷号: 10, 期号:9, 页码:4940-4944
关键词: NO_3~-还原 ; 反应动力学 ; 电子传递
其他题名: Mechanism of promotion effect of Fe~(2+) on nitrate reduction by Fe~0
中文摘要: 通过不同条件下Fe~0还原NO_3~-的研究发现,在中性条件下溶液中Fe~(2+)明显强化了Fe~0对NO_3~-的还原,最终还原产物以NH_4~+ -N为主,而反应过程中Fe~(2+)消耗与NO_3~-还原量存在明显的正相关性。在Fe~(2+)初始浓度为1 ~ 8 mmol· L~(-1)条件下,6 g·L~(-1)的Fe~0对初始浓度为100 mg·L~(-1) NO_3~-的还原符合零级反应动力学过程,结合电化学和X射线衍射分析,证明Fe~(2+)通过沉积到Fe~0表面,加速了电子传递过程,促进Fe~0表面活性,从而强化了Fe~0对NO_3~-的还原。
部门归属: 环境水质学国家重点实验室
英文摘要: In this work,nitrate reduction by Fe~0 under different conditions was studied. The results indicated that dissolved Fe~(2+) promoted the reduction of NO_3~- at a neutral pH. NH_4~+ -N was the main reduction product, and the amount of consumed Fe~(2+) correlated positively with the amount of nitrate reduction. Moreover,with an initial concentration of 1 to 8 mmol·L~(-1) Fe~(2+) ,100 mg·L~(-1) of nitrate ( initial concentration) was reduced by 6 g·L~(-1) Fe~0 ; this process conformed to zero-order reaction kinetics. Electrochemical measurements and Xray powder diffraction ( XRD) results indicated that Fe~(2+) accelerated the electron transfer process by precipitating on the surface of iron,which in turn promoted the surface activity of Fe~0,and accelerated nitrate reduction.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36536
Appears in Collections:环境水质学国家重点实验室_期刊论文

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Recommended Citation:
陈占,王海波,韩陆超,等. 溶液中Fe~(2+)强化Fe~0还原NO_3~-的机制[J]. 环境工程学报,2016,10(9):4940-4944.
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