Evaluating fluorescence and ultraviolet photometry to assess dissolved organic matter removal during coagulation-flocculation

摘要

Ultraviolet absorption at 254nm (UV_(254)) and peaks (A, C and T) fluorescence intensities were evaluated to assess dissolved organic carbon (DOC) removal during coagulation-flocculation. The consistency of fluorescence data was checked to ensure that no inner filter effect, quenching or enhanced intensities affected the data. The decreases in UV_(254) and peak intensities were calculated in percentage terms between raw and clarified water and compared with measured DOC removal. The results indicate that peak A, peak C, peak T and UV_(254) exhibit strong linear relationships (R~2: 0.91, 0.89, 0.92 and 0.99, respectively) with DOC removal, implying that these parameters are useful indicators of DOC removal.