| 초록 |
A study on the destruction of ethylenediaminetetraacetic acid(EDTA), oxalic acid(OA), and citric acid(CA) was carried out to develop and ambient temperature aqueous process, known as mediated electrochemical oxidation(MEO), for the treatment of organic decontamination liquid wastes. In the MEO using electro-regenerative Ag(II) as a mediator, the effects of process parameters, which include the applied current density, the anolyte concentration and the temperature on the destruction behavior of EDTA, OA, and CA were interpreted. Ultimate conversion efficiencies of 93~97% were obtained with EDTA, CA, and OA due to the transportation of some of organic substrates to the catholyte across the cation selective membrane and the volatilization of intermediates produced during the MEO. Organic substrates remaining in the anolyte, however, could be completely destroyed to form carbon dioxide and water by reaction with electro-regenerative Ag(II). With increasing current density, the current efficiency on the MEO of each chemical decontamination agent was decreased, on the other hand, with increasing temperature; the rate of destruction was slightly increased. |
