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. 2018 Jan 16;5:1. doi: 10.1186/s40694-018-0045-6

Fig. 3.

Fig. 3

Analysis of the fluorescent matter in raw SDW filtrate (a) and in SDW filtrate treated for 5 days with A. niger (b) according to classification provided for wastewater: peak (A) corresponds to protein-like (PN-like) substances [40] and peak (B) to phenolic acid-like (PA-like) compounds [41]; peaks (C) and (D) can be related to humic acid-like (HA-like) substances [42]