Fig. 4. Synchronous fluorescence spectra of the Suwannee River fulvic acid sample (SRF) (solid lines) and the unfractionated dissolved organic carbon sample from a tertiary wastewater treatment plant (MWW) (dashed lines) at variable values of (A) 20 nm, (B) 40 nm, and (C) 60 nm (dissolved organic carbon = 1 mg/L; pH = 3; inner-filter correction applied).

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