%0 Journal Article
%T 电化学/催化加氢工艺去除硝酸盐的动力学及机理
%A 张志强
%A 徐勇鹏
%A 时文歆
%A 张瑞君
%A 鲍现
%A 崔福义
%J 哈尔滨工业大学学报
%D 2016
%R 10.11918/j.issn.0367-6234.2016.02.015
%X 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.</br>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.
%K 硝酸盐
%K 电化学反硝化
%K 催化还原
%K 动力学&lt
%K /br&gt
%K nitrate
%K electrochemistry
%K denitrification
%K catalytic
%K hydrogenation
%K kinetic
%U http://hit.alljournals.cn/hitxb_cn/ch/reader/view_abstract.aspx?file_no=20160215&flag=1