Electrochemical Treatment of 2,4,6-Trinitrotoluene and Related Compounds

Abstract

This work involves electrolysis of nitrotoluene congeners, which are persistent pollutants that enter the environment as a consequence of their manufacture and use as explosives. Reduction to aminotoluenes occurred with high current efficiency at a variety of cathodes, at potentials -0.5 to -1 V vs SCE. The products were formed in high chemical yield and with excellent mass balance. Preliminary experiments were also carried out to find methods of removing the electrolysis products from solution by oxidative oligomerization. The most satisfactory method was partial reoxidation at a Ti/IrO2 anode, suggesting an overall remediation technology in which reduction is followed by reoxidation of the spent catholyte in the anode compartment of the same electrolytic cell.

Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

“…lower the energy efficiency [31]. Moreover, under most conditions pollutant impurities are present at such low concentrations that electrochemical processes are diffusion-controlled.…”

Advanced Oxidation Processes (AOPs) for Removal of Pesticides from Aqueous Media

“…The most useful direct electrochemical method is anodic oxidation (Kaba et al, 1990;Kotz et al, 1991;Stucki et al, 1991;Comninellis andPulgarin, 1991, 1993;Murphy et al, 1992;Comninellis and Nerini, 1995;Feng et al, 1995;Johnson et al, 1999;Gandini et al, 2000;Rodrigo et al, 2001;Rodgers and Bunce, 2001;Wu and Zhou, 2001) where organic compounds are essentially degraded by reaction with adsorbed hydroxyl radicals at the anode surface, which are generated from water oxidation:…”

The progress of catalytic technologies in water purification: A review

“…The introduction of catalytic reaction into electrochemical technology, which is called as electrocatalytic technology, would not only notably increase the efficiency and decrease the cost, but also broaden its availability for the degradation of the recalcitrant pollutants (Rajeshwar et al, 1994;Rodger and Bunce, 2001). In this article, we will focus on the review of the electrocatalytic oxidation in respect of high efficient electrodes and electroFenton method.…”