Kinetics for ammonium ion removal using a three-dimensional electrode system

被引：2
|
作者：
Qiao, Qicheng [1 ,2 ]
Zhao, Yuemin [3 ]
Wang, Lizhang [1 ]
机构：
[1] China Univ Min & Technol, Sch Environm Sci & Spatial Informat, Xuzhou 221116, Jiangsu, Peoples R China
[2] Nantong Agr Coll, Dept Environm & Resources, Nantong City 226007, Jiangsu, Peoples R China
[3] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China
来源：
WATER SCIENCE AND TECHNOLOGY | 2013年 / 67卷 / 01期
关键词：
ammonium ion (NH4+); electrochemical oxidation; kinetics; three-dimension electrode (TDE); WASTE-WATER; ELECTROCHEMICAL OXIDATION; DEGRADATION; PHENOL;
D O I：
10.2166/wst.2012.486
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Electrochemical oxidation of ammonium ions (NH4+) by using a three-dimensional electrode (TDE) composed of IrO2-Ta2O5/Ti anode and bamboo carbon was carried out in this paper. Experimental results reveal that the NH4+ oxidation follows first-order kinetics at lower NH4+ concentration and the rate constant is highly dependent on the applied current density, dosage of chlorine ions and initial NH4+ concentration. In addition, increasing current density, more Cl- dosage and higher initial NH4+ concentration are beneficial for NH4+ removal. By inspecting the relation between rate constant and those operating factors, an overall empirical equation for estimation of the rate constant of NH4+ oxidation is presented. The estimated model is in good agreement with the experimental results and it could also be used for accurate design of the TDE system.
引用
收藏
页码：168 / 173
页数：6
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