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OH and SO4− predominated when the initial pH was 9.0. The XPS analysis indicated that Fe(II) and oxygenated functional groups activated persulfate. In addition, carbon-carbon double bonds would be transformed into ketone and quinone which could activate persulfate during the reaction.
Biochar (BC) supported nanoscale zerovalent iron (nZVI) composite was synthesized and used as an activator for persulfate to enhance the trichloroethylene (TCE) removal in aqueous solutions. The degradation efficiency of TCE (0.15mmolL−1) was 99.4% in the presence of nZVI/BC (4.5mmolL−1, nZVI to BC mass ratio was 1:5) and persulfate (4.5mmolL−1) within 5min, which was significantly higher than that...
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