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. Author manuscript; available in PMC: 2020 Sep 15.
Published in final edited form as: Appl Energy. 2019 May 14;250:1011–1022. doi: 10.1016/j.apenergy.2019.05.108

Fig. 9.

Fig. 9.

Identification of sulfate radical in (a) Fe(II)/sulfite process, (b) electro/sulfite process, and (c) electro/Fe(II)/sulfite process through radical-scavenging assays. Conditions: (a) 10 μM ibuprofen, 0.1 mM Fe(II), 1 mM sulfite, 10 mM Na2SO4, initial pH 7; (b) 10 μM ibuprofen, 1 mM sulfite, 10 mM Na2SO4, 200 mA, initial pH 7; (c) 10 μM ibuprofen, 0.1 mM Fe(II), 1 mM sulfite, 10 mM Na2SO4, 200 mA, initial pH 7.