fig6
Figure 6. XPS analysis showing the wide scan spectra (A); and narrow scan spectra of Cu2p (B); Fe2p (C) and O1s (D) of nZVI reacted with Cu2+ (initial concentration = 5 mmol/L; nZVI dosage = 0.5 g/L; initial pH = 4.0 ± 0.1; temperature = 25 ± 1 °C; reaction time = 2 h). XPS: X-ray photoelectron spectroscopy.
