Electrochemical removal of nitrate ions in waste solutions after regeneration of ion exchange columns

被引：107

作者：

Paidar, M ^{[1
]}

Rousar, I ^{[1
]}

Bouzek, K ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Inorgan Technol, CR-16628 Prague 6, Czech Republic

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 1999年 / 29卷 / 05期

关键词：

drinking water; electrochemical nitrate ion reduction; ion exchange column;

D O I：

10.1023/A:1026423218899

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical reduction of nitrate ions in synthetic regenerating solutions after ion exchange column regeneration was studied. The influence of current density on the current efficiency was determined in the range 2.8-7.6 mA cm(-2) in a diaphragmless flow-through electrolyser in a batch recirculation mode. A Cu cathode and a Ti/Pt anode was used, the temperature being maintained at 25 degrees C. Highest integral current efficiency occurred at 2.8 mA cm(-2). The presence of about 6 mg dm(-3) Cu ions in treated solution was found to prevent a decrease in cathode activity and, consequently, in electrolysis efficiency. The catalytic influence of Cu ions was verified by potentiodynamic polarisation experiments on a copper rotating disc electrode and by chronopotentiometry performed during the course of electrolysis.

引用

页码：611 / 617

页数：7

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