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Tracking changes in dissolved natural organic matter composition

evaluating drinking water production using optical and molecular level tools

Lavonen, Elin (2015). Tracking changes in dissolved natural organic matter composition. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2015:42
ISBN 978-91-576-8282-6
eISBN 978-91-576-8283-3
[Doctoral thesis]

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Abstract

During the last decades, the abundance of dissolved organic matter (DOM), a complex heterogeneous mixture of organic compounds, has increased in many surface waters in Northern Europe and North America. Surface waters are widely used as raw water sources for drinking water production. Increasing DOM is problematic for water treatment plants (WTPs) due to e.g. increased coagulant demand and because its constituents act as precursors for potentially harmful disinfection by-products. Many WTPs employing conventional treatment are currently struggling to maintain sufficient DOM removal, and are considering additional novel techniques.

In this thesis, changes in the DOM composition were investigated during i) conventional water treatment and disinfection practices, ii) pilot scale studies of novel processes (nanofiltration and ion exchange), and iii) transport in a large Swedish boreal lake. Analytical techniques used include common spectroscopic methods (absorbance and fluorescence), and more advanced molecular level techniques (ultra-high resolution mass spectrometry). Results show that coagulation was highly selective towards oxidized DOM components, and that the removed fraction resembled terrestrial endmembers. Meanwhile, DOM with microbial endmember characteristics, which correlated with chemically reduced DOM components, was especially reactive during slow sand filtration. After disinfection, 499 different chlorine-containing by-products were identified, of which many had not been reported in the literature earlier. Both nanofiltration and ion exchange removed more DOM than coagulation, and components with a wider range of chemical properties. Both techniques were, however, most efficiently removing terrestrial DOM.

In the studied large boreal lake, terrestrial, aromatic compounds were lost over time, while no significant net in-lake production occurred. Decreasing components overlapped largely with those removed during coagulation treatment at WTPs, indicating that coagulation had contributed significantly to DOM removal within the lake, especially considering a concurrent loss of dissolved iron.

Authors/Creators:Lavonen, Elin
Title:Tracking changes in dissolved natural organic matter composition
Subtitle:evaluating drinking water production using optical and molecular level tools
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2015
Depositing date:6 May 2015
Volume:2015:42
Number of Pages:67
Papers/manuscripts:
NumberReferences
ILavonen, E.E., Gonsior, M., Tranvik, L.J., Schmitt-Kopplin, P., Köhler, S.J. (2013). Selective chlorination of natural organic matter: Identification of previously unknown disinfection by-products. Environmental Science & Technology 47(5), 2264-2271. http://pubs.acs.org/doi/abs/10.1021/es304669p
IILavonen, E.E., Kothawala, D., Tranvik, L.J., Gonsior, M., Schmitt-Kopplin, P., Köhler, S.J. Ultra-high resolution mass spectrometry explains changes in the optical properties of dissolved organic matter during drinking water production. (manuscript in review for Water Research)
IIIKöhler, S.J., Lavonen, E.E, Keucken, A., Schmitt-Kopplin, P., Spanjer, T., Persson, K.M. Upgrading coagulation with hollow-fibre nanofiltration for improved organic matter removal during surface water treatment. (manuscript)
IVLavonen, E.E, Hertkorn, N., Schmitt-Kopplin, P., Harir, M., Köhler, S.J. How turnover time affects dissolved organic matter composition – tracking lake organic carbon processing with optical and molecular level tools. (manuscript)
Place of Publication:Uppsala
Publisher:Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8282-6
ISBN for electronic version:978-91-576-8283-3
ISSN:1652-6880
Language:English
Additional Information:Errata - Page 53 Figure 13: On the right hand side of the figure CarH-OH, -OR should be removed.
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M40 Aquatic ecology
P Natural resources > P10 Water resources and management
X Agricola extesions > X50 Chemistry
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 104 Chemical Sciences > Analytical Chemistry
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geochemistry
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 201 Civil Engineering > Water Engineering
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Water Treatment
Agrovoc terms:drinking water, organic matter, dissolving, water quality, absorbance, fluorescence, coagulation, filtration, nanotechnology, water analysis, analytical methods, lakes, watershed management
Keywords:dissolved organic matter, drinking water, absorbance, fluorescence, FT-ICR-MS, coagulation, nanofiltration, in-lake processing, selective removal
URN:NBN:urn:nbn:se:slu:epsilon-e-2628
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2628
ID Code:12176
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
External funders:FORMAS
Deposited By: Elin Lavonen
Deposited On:07 May 2015 14:14
Metadata Last Modified:07 Feb 2016 03:27

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