2026-04-17T15:22:45Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/185972024-06-18T11:53:58Zcom_2072_452955com_2072_2054col_2072_453077

00925njm 22002777a 4500 dc Sanchís, Josep author Jaén Gil, Adrián author Gago Ferrero, Pablo author Munthali, Elias author Farré, Maria José author 2020-06-01 In order to understand and minimize the formation of halogenated disinfection by-products (DBPs), it is important to investigate how dissolved organic matter (DOM) contributes to their generation. In the present study, we analysed the DOM profile of water samples from the Barcelona catchment area by high resolution mass spectrometry (HRMS) and we studied the changes after chlorination. Chlorination produced significant changes in the DOM, decreased the average m/z and Kendrick mass defect (KMD) of their spectra and decreased the number and abundance of lignin-like features. The Van Krevelen (VK) fingerprint exhibited several noticeable changes, including the appearance of highly oxidized peaks in the tannin-like region (average O/C, 0.78 ± 0.08), the appearance of features with low H/C and the disappearance of more than half of the lipids-like features. Up to 657 halogenated peaks were generated during sample chlorination, most of which in the condensed hydrocarbons-like and the lignin-like region of the VK diagram. Around 200 features were found to be strongly correlated (ρ ≥ 0.795) to the formation potential of trihalomethanes (THMs) and 5 were correlated with the formation potential of haloacetonitrile (HANs). They all were plotted in the lignin fraction of the VK diagram, but both groups of features exhibited different nitrogen content: those features related to HANs FP had at least one nitrogen atoms in their structures, whilst those related to THMs did not. This project was funded by the Spanish Ministry of Science,Innovation and Universities, AEI-MICIU, and the European Fund forRegional Development under the National Program for Research Aimed at the Challenges of Society, through the project NDMA_Predict (CTM 2017-85335-R); and by the European Union’s Horizon2020 Research and Innovation Programme, through the MANTEL-ITN Project (Grant No: 722518). The authors thank Generalitat deCatalunya through Consolidated Research Group ENV 2017 SGR1124 and Tech 2017 SGR 1318. ICRA researchers thank funding fromCERCA program. MJF acknowledges her Ramón y Cajal fellowship (RyC-2015-17108), from the AEI-MICIU; AJG acknowledges his PhDscholarship from AGAUR (2019FI_B2_00202), from the Governmentof Catalonia; PGF acknowledges SmartWorkflow, which has received funding from the European Union’s Horizon 2020 R&Iprogram under grant 791235 http://hdl.handle.net/10256/18597 Aigües residuals -- Depuració Sewage -- Purification Espectrometria de masses Mass spectrometry Clor Chlorine Characterization of organic matter by HRMS in surface waters: Effects of chlorination on molecular fingerprints and correlation with DBP formation potential