A phenol synthetic solution was oxidized by an electro-peroxone process (combination of electrolysis and ozonation) in an up-flow bubble column reactor. BDD electrodes where used to in situ electrogenerate H2O2 when applying a current density of 60 mA cm-2 and pH 7. It was found that, under these conditions, phenol was mineralized and toxicity essays over Latuca sativa demonstrated that toxicity was totally removed. The results were contrasted with those found by electrolysis and ozonation, separately. Although a mineralization degree was 92 % by electrolysis, toxicity was not low but moderate. This was ascribed to the presence of oxalyc acid identified by HPLC. In the case of ozonation, this process was inefficient on both, mineralizing phenol and removing toxicity. Actually, the treated solution was more toxic than the one prior treatment. In this case, oxalic acid was also the main final product.

Toxicity removal by electro-peroxone process

253rd National Meeting (2017)

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