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. 2020 Feb 10;25:e00433. doi: 10.1016/j.btre.2020.e00433

Fig. 3.

Fig. 3

Fluorescence excitation–emission matrix (EEM) spectra for (a) control sample with a moderate-intensity peak for humic-like substances (with “H” mark); (b) Electrocoagulated sample with aluminum electrodes for 5 min showing no humic-like moderate-intensity peak(Al5) ; (c) Electrocoagulated sample with aluminum electrodes for 10 min showing no humic-like moderate-intensity peak (Al10); (d) Electrocoagulated sample with aluminum electrodes for 10 min showing no moderate-intensity humic-like peak (Fe5); (e) Electrocoagulated sample with aluminum electrodes for 10 min showing no moderate-intensity humic-like peak (Fe10). Z-axis = excitation (nm); X-axis = emission (nm); and Y-axis = intensity.