Fig. 2. Excitation–emission matrix (EEM) spectra (dissolved organic carbon [DOC] = 1 mg/L): the unfractionated dissolved organic carbon sample from a tertiary wastewater treatment plant (MWW) at pH 3 (A) with and (B) without inner-filter correction; Suwannee River fulvic acid sample (SRF) at pH 3 (C) with and (D) without inner-filter correction; SRF at pH 7 (E) with and (F) without inner-filter correction.

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