Abstract
Trichloroethylene (TCE) was transformed to CO2, CO, Cl− and ClO3− at the anode of a two-chambered electrolytic cell. The working electrode was constructed from Ebonex®, an electrically conductive ceramic (Ti4O7). Under our experimental conditions (anode potential Ea = 2.5 to 4.3 V vs SSCE), the disappearance of TCE was first order in TCE concentration. The transformation rate was independent of pH in the range 1.6 4.0V). The maximum (transport-limited), surface-area-normalized rate constant was about 0.002 43cms−1. Carbon-containing products included CO2 primarily with traces of CO. At neutral and alkaline pHs, the only chlorine-containing products were Cl− and ClO3−. Hydroxyl radicals were detected in the anodic compartment using a spin trap (4-POBN). A kinetic model was successfully correlated with experimental results.
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