| 引用本文: | 张志强,徐勇鹏,时文歆,张瑞君,鲍现,崔福义.电化学/催化加氢工艺去除硝酸盐的动力学及机理[J].哈尔滨工业大学学报,2016,48(2):88.DOI:10.11918/j.issn.0367-6234.2016.02.015 |
| ZHANG Zhiqiang,XU Yongpeng,SHI Wenxin,ZHANG Ruijun,BAO Xian,CUI Fuyi.Reductive removal of nitrate by electrochemistry/catalytic hydrogenation coupling process: kinetics and mechanism[J].Journal of Harbin Institute of Technology,2016,48(2):88.DOI:10.11918/j.issn.0367-6234.2016.02.015 |
|
| 摘要: |
| 为解决地下水硝酸盐（NO3--N）污染问题，采用电化学/催化加氢耦合工艺对其进行去除，重点考察该工艺对NO3--N的降解动力学及反应机理.结果表明，电化学/催化加氢耦合工艺在厌氧条件下能够在短时间内将NO3--N完全去除，去除速率（以N计）可达72.6 mg·L-1·h-1，反应符合二级反应动力学规律，常数k=0.005 5 cm2·mA-1·min-1.水中NO3--N一部分由电化学反硝化降解去除，另一部分由催化加氢还原去除，两种反应通过电解水产H2反应耦联成为一个整体，宏观上符合电化学反硝化机理.
|
| 关键词: 硝酸盐 电化学反硝化 催化还原 动力学 |
| DOI：10.11918/j.issn.0367-6234.2016.02.015 |
| 分类号:X52 |
| 文献标识码:A |
| 基金项目:城市水资源与水环境国家重点实验室(哈尔滨工业大学)资助(2013DX12). |
|
| Reductive removal of nitrate by electrochemistry/catalytic hydrogenation coupling process: kinetics and mechanism |
|
ZHANG Zhiqiang,XU Yongpeng, SHI Wenxin,ZHANG Ruijun, BAO Xian, CUI Fuyi
|
|
(State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology), 150090 Harbin, China)
|
| Abstract: |
| The kinetics and mechanism in the electrochemistry/catalytic hydrogenation (E/C) coupling process, which was employed to remove nitrate (NO3--N) from groundwater, was investigated in this paper. The results demonstrated that the NO3--N could be rapidly removed by E/C under anoxic conditions, and the degradation efficiency of NO3--N followed the increasing current density(ID) with observed second order reaction rate and the constant(k) value of 0.005 5 cm2·mA-1·min-1. The NO3--N reductive by E/C with two kinds of reactions, electrochemistry denitrification and catalytic reduction, both of which aggregated by the reaction of brine electrolysis.
|
| Key words: nitrate electrochemistry denitrification catalytic hydrogenation kinetic |
