New Insights into the <i>In Situ</i> Fenton-like Process by Copper(II)-hydroxylamine Coupling: Reactive Species, Applications, and Limitations.

ABSTRACT: This work studied the effect of pH, [O₂], H₂O₂ external addition, chelating agents, common anions, transition metals, and produced toxicity, in the process Cu-(II)/NH₂OH (employing benzoate as a probe). It was observed that (i) acidification by NH₂OH·HCl addition hindered the process significantly as the Cu-(NH₂OH)²⁺ is principally formed at pH = 6-8, (ii) high HCO₃ ^- concentrations (≥1 mM) accelerated the NH₂OH consumption (>95% in 5 min) and pollutant oxidation (k _obs ≈ 2 × 10^-2 min^-1 with initial benzoate concentration 50 μM) due to the buffer effect and the formation of a Fenton-like active species, CuCO_3(aq), (iii) the Mo-(VI)

SUBMITTER: Pellegrino S 

PROVIDER: S-EPMC12910991 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature