In-depth analysis of natural organic matter fractions in drinking water treatment performance: Fate and role of humic substances in trihalomethanes formation potential.

Autor: Valenti-Quiroga M; LEQUIA, Institute of the Environment, Universitat de Girona, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Spain., Cabrera-Codony A; LEQUIA, Institute of the Environment, Universitat de Girona, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Spain., Emiliano P; Ens d'Abastament d'Aigua Ter-Llobregat (ATL), Sant Martí de l'Erm 2, E-08970 Sant Joan Despí, Barcelona, Spain., Valero F; Ens d'Abastament d'Aigua Ter-Llobregat (ATL), Sant Martí de l'Erm 2, E-08970 Sant Joan Despí, Barcelona, Spain., Monclús H; LEQUIA, Institute of the Environment, Universitat de Girona, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Spain., Martin MJ; LEQUIA, Institute of the Environment, Universitat de Girona, Carrer Maria Aurèlia Capmany, 69, E-17003 Girona, Spain. Electronic address: maria.martin@udg.edu.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Dec 01; Vol. 954, pp. 176600. Date of Electronic Publication: 2024 Sep 28.
DOI: 10.1016/j.scitotenv.2024.176600
Abstrakt: In this study we investigate the compositional changes in dissolved organic matter (DOM) fractions across diverse water sources and treatment processes in three Drinking Water Treatment Plants (DWTPs). High-Performance Size Exclusion Chromatography coupled with Diode Array Detection and Organic Carbon Detection (HPSEC-DAD-OCD) was employed to characterize DOM fractions, offering insights into treatment optimization. We examine bulk water parameters, DOM distributions, and the efficiency of treatment trains in reducing DOM fractions. Results reveal distinct DOM composition profiles in river-sourced versus reservoir-sourced waters, with implications for treatment processes. Coagulation, Granular Activated Carbon (GAC) adsorption, Electrodialysis Reversal (EDR), and Ion Exchange (IEX) were evaluated for their efficacy in removing DOM fractions. The analysis highlights the effectiveness of coagulation in reducing high molecular weight (MW) fractions, while GAC filtration targets lower MW fractions. EDR shows significant removal of anions and aromatics, while IEX demonstrates high removal efficiencies for removing humic substances (HS) fractions. Spectroscopic analysis further elucidates changes HS sub-fractions and their role in disinfection by-products (DBP) formation. To quantitatively assess the relationship between HS sub-fractions and trihalomethane formation potentials (THMFP), Pearson correlation analysis were conducted, unveiling robust associations between HS sub-fractions and THM-FP that can be predicted by surrogate parameters such as A 254 .
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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