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Electrochemical pilot scale study for reduction of 2,4-DNT
R Doppalapudi1, D Palaniswamy, G Sorial
1University of Cincinnati, Cincinnati, Ohio 45221, USA.
Summary
This study demonstrates effective electrochemical treatment of munitions wastewater, reducing 2,4-dinitrotoluene (DNT) by 80% over 14 days. Optimized conditions in a pilot reactor show high DNT reduction efficiency.
Area of Science:
- Environmental Science
- Electrochemistry
- Chemical Engineering
Background:
- Munitions wastewater poses environmental risks due to contaminants like 2,4-dinitrotoluene (DNT).
- Effective treatment methods are crucial for remediating hazardous industrial effluents.
Purpose of the Study:
- To evaluate the efficacy of an electrochemical reactor for treating simulated munitions wastewater.
- To determine optimal operating conditions for DNT reduction using electrochemical methods.
Main Methods:
- Utilized a pilot-scale electrochemical reactor with a glassy carbon-coated graphite cathode and platinum anode.
- Conducted batch experiments to optimize current, electrolyte concentration, and type.
- Performed continuous flow experiments to assess DNT reduction stability and efficiency.
Main Results:
- DNT reduction rates increased with higher applied current and electrolyte concentration.
- A continuous current of 200 mA achieved stable 80% DNT reduction for 14 days.
- Reactor cleaning was necessary after 14 days due to solid formation.
- 100% molar balance conversion of end products was confirmed.
Conclusions:
- Electrochemical treatment is a viable method for munitions wastewater remediation.
- Optimized electrochemical parameters ensure efficient and stable DNT removal.
- Pilot-scale validation confirms the potential for industrial application.