Electrochemical denitrification of simulated ground water

Simulated groundwater with varying nitrate concentrations ranging 100 200 mg/l were used to investigate electrochemical denitrification. Aluminum, graphite, iron, and titanium plates of appropriate sizes were used as electrode materials. Results showed that electrochemical NO sub(3) removal followed...

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Bibliographic Details
Published in:Water research (Oxford) 2005-10, Vol.39 (17), p.4065-4072
Main Authors: Dash, B.P, Chaudhari, S
Format: Article
Language:English
Subjects:
aluminum
denitrification
drinking water
economic analysis
electrochemistry
electrodes
groundwater contamination
iron
nitrate nitrogen
redox potential
titanium
water treatment
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Summary:Simulated groundwater with varying nitrate concentrations ranging 100 200 mg/l were used to investigate electrochemical denitrification. Aluminum, graphite, iron, and titanium plates of appropriate sizes were used as electrode materials. Results showed that electrochemical NO sub(3) removal followed first-order kinetics. The transformation of NO sub(3) to N sub(2) was dependent largely on the electrode material used and insignificantly on pH. The Fe and Al plates transformed NO sub(3) to ammonia, while Ti transformed NO sub(3) to N sub(2). The cell with the Fe electrode exhibited the maximum negative oxidation reduction potential, followed by Al and Ti.
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2005.07.032