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. 2021 May 7;75:105586. doi: 10.1016/j.ultsonch.2021.105586

Fig. 7.

Fig. 7

Comparison of various treatment schemes in terms of the COD reduction (operating conditions = H2O2:17.5 g/L, H2O2/Fe2+:3, HC inlet pressure: 4 bar) (effluent-II).