Characteristics of the optical measurements taken for each sample, showing
the UV/Vis absorbance spectra for the samples at 4–5 mg/L C;
the absorbance at 254 nm across the DOC range of 0.5-8 mg/L C;
the EEMs humic-like peak A integrations (Ex 240–300 nm, Em 400–500 nm) across the DOC range of 0.5-8 mg/L C; and the full EEMs spectra of the
acid-insoluble samples at approximately 5 mg/L C. Calculations from the optical measurements are given in Table 1.