Ammonium nitrate wastewater treatment by coupled membrane electrolysis and electrodialysis

被引：20

作者：

Gain, E

Laborie, S ^{[1
]}

Viers, P

Rakib, M

Durand, G

Hartmann, D

机构：

[1] Ecole Cent Paris, Lab Chim & Genie Procedes, F-92295 Chatenay Malabry, France

[2] Soc COGEMA, F-26701 Pierrelatte, France

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2002年 / 32卷 / 09期

关键词：

ammonium nitrate; electrochemical splitting; electrodialysis; membrane electrolysis; stripping;

D O I：

10.1023/A:1020908702406

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

A process coupling membrane electrolysis and electrodialysis is implemented to treat ammonium nitrate wastewater. Membrane electrolysis produces ammonia and nitric acid while electrodialysis reconcentrates the depleted salt solution. Ammonia is removed continuously by in situ stripping; thus allowing gas production with a constant current efficiency (about 70%). Nitric acid up to 8 mol L-1 is obtained. The current efficiency of acid production depends on nitric acid concentration. When this concentration varies from 1 to 8 mol L-1 the average current efficiency is about 58%. Electrodialysis produces a rejected stream containing less than 3 x 10(-3) mol L-1 of ammonium nitrate.

引用

页码：969 / 975

页数：7

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