Catalytic Effect of Copper on Ozonation in Aqueous Solution

Catalytic effects of cupric ion (Cu2+) and zero-valent copper (Cu-0) on ozonation in aqueous solution were discussed in this research using 1,4-dioxane as a radical probe. Ozonation with Cu-0 enhanced 1,4-dioxane removal, whereas Cu2+ had no catalytic effect. Two initiation steps were proposed for the catalytic effect of Cu-0; the corrosion of Cu-0 by oxygen and ozone and a one-electron redox reaction of Cu-0 with ozone. The former produced cuprous ion (Cu+) and the latter produced both Cu+ and ozonide ion (O-3(-)). Hydroxyl radicals (HO) was generated by the reaction of Cu+ with ozone and protonation of O-3(-).

Automated summary

This research discussed the catalytic effects of cupric ion (Cu2+) and zero-valent copper (Cu-0) on ozonation in aqueous solution, finding that Cu-0 enhanced the removal of 1,4-dioxane while Cu2+ had no catalytic effect. The catalytic effect of Cu-0 was proposed to involve two initiation steps: the corrosion of Cu-0 by oxygen and ozone, and a one-electron redox reaction of Cu-0 with ozone, generating cuprous ion (Cu+) and ozonide ion (O-3(-)). Hydroxyl radicals (HO) were produced by the reaction of Cu+ with ozone and protonation of O-3(-).