Publication Details

Category Text Publication
Reference Category Journals
DOI 10.3390/w13121703
Licence creative commons licence
Title (Primary) New insights into the seasonal variation of DOM quality of a humic-rich drinking-water reservoir—coupling 2D-fluorescence and FTICR MS measurements
Author Wilske, C.; Herzsprung, P.; Lechtenfeld, O.J. ORCID logo ; Kamjunke, N.; Einax, J.W.; von Tümpling, W. ORCID logo
Source Titel Water
Year 2021
Department SEEFO; FLOEK; ANA
Volume 13
Issue 12
Page From art. 1703
Language englisch
Topic T5 Future Landscapes
Supplements https://www.mdpi.com/2073-4441/13/12/1703/s1
Keywords DOM; humic substances; 2D fluorescence; FTICR MS; PARAFAC; EEM
UFZ wide themes ProVIS;
Abstract Long-term changes in dissolved organic matter (DOM) quality, especially in humic-rich raw waters, may lead to intensive adaptions in drinking-water processing. However, seasonal DOM quality changes in standing waters are poorly understood. To fill this gap, the DOM quality of a German drinking water reservoir was investigated on a monthly basis by Fourier-transform ion cyclotron resonance mass spectrometry (FTICR MS) measurements and 2D fluorescence for 18 months. FTICR MS results showed seasonal changes of molecular formula (MF) intensities, indicating photochemical transformation of DOM as a significant process for DOM quality variation. For an assessment of the two humic-like components, identified by parallel factor analysis (PARAFAC) of excitation–emission matrices (EEM), their loadings were Spearman’s rank-correlated with the intensities of the FTICR MS-derived MF. One of the two PARAFAC components correlated to oxygen-rich and relatively unsaturated MF identified as easily photo-degradable, also known as coagulants in flocculation processes. The other PARAFAC component showed opposite seasonal fluctuations and correlated with more saturated MF identified as photo-products with some of them being potential precursors of disinfection byproducts. Our study indicated the importance of elucidating both the chemical background and seasonal behavior of DOM if raw water-quality control is implemented by bulk optical parameters.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24755
Wilske, C., Herzsprung, P., Lechtenfeld, O.J., Kamjunke, N., Einax, J.W., von Tümpling, W. (2021):
New insights into the seasonal variation of DOM quality of a humic-rich drinking-water reservoir—coupling 2D-fluorescence and FTICR MS measurements
Water 13 (12), art. 1703 10.3390/w13121703