The chemodiversity of algal dissolved organic matter from lysed Microcystis aeruginosa cells and its ability to form disinfection by-products during chlorination

WATER RESEARCH

卷:155

Article

Gonsior, Michael¹  Powers, Leanne C.¹  Williams, Ernest²  Place, Allen²  Chen, Feng²  Ruf, Alexander^3,4,5  Hertkorn, Norbert³  Schmitt-Kopplin, Philippe^3,4 

[1] Univ Maryland, Chesapeake Biol Lab, Ctr Environm Sci, Solomons, MD 20688 USA

[2] Univ Maryland, Ctr Environm Sci, Inst Marine & Environm Technol, Baltimore, MD 21201 USA

[3] Helmholtz Zentrum Muenchen, Res Unit Analyt BioGeoChem, Neuherberg, Germany

[4] Tech Univ Munich, Chair Analyt Food Chem, Freising Weihenstephan, Germany

[5] Univ Aix Marseille, Lab Phys Interact Ion & Mol PIIM, CNRS, UMR 7345, F-13397 Marseille, France

关键词: Microcystis aeruginosa;    Disinfection by-products;    FT-ICR MS;    Non-target screening;    Algal DOM;   

DOI  :  10.1016/j.watres.2019.02.030

来源: Elsevier

【 摘 要 】

Algal-derived dissolved organic matter (ADOM) originating from lysed Microcystis aeruginosa cells was investigated as precursor material to form disinfection by-products upon disinfection with free chlorine. Non-targeted ultrahigh resolution 12 T negative mode electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) revealed high molecular diversity in solid-phase extracted and ionizable components of Microcystis aeruginosa ADOM. The toxin microcystin LR was effectively degraded by free chlorine, which was expected. However, we found a high diversity of disinfection by-products associated with the addition of free chlorine to the water-soluble and solid-phase extractable fraction of ADOM and of double-bond moieties in abundant and known unsaturated fatty acids. Aromatic DOM precursors were absent from known metabolites of Microcystis aeruginosa and no evidence for aromatic disinfection by-products (DBPs) was found, despite N-containing compounds. A large diversification of N-containing molecular formulas was observed after chlorination, which seems indicative for the breakdown and oxidation of larger peptides. Additionally, a diverse group of N-compounds with presumed chloramine functional groups was observed. This study highlights the importance to evaluate ADOM and its ability to form different DBPs when compared to allochthonous or terrestrially-derived DOM. (C) 2019 The Author(s). Published by Elsevier Ltd.

【 授权许可】

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