Tracking changes in the optical properties and molecular composition of dissolved organic matter during drinking water production

Water Research
Elin E LavonenStephan J Köhler

Abstract

Absorbance, 3D fluorescence and ultrahigh resolution electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR-MS) were used to explain patterns in the removal of chromophoric and fluorescent dissolved organic matter (CDOM and FDOM) at the molecular level during drinking water production at four large drinking water treatment plants in Sweden. When dissolved organic carbon (DOC) removal was low, shifts in the dissolved organic matter (DOM) composition could not be detected with commonly used DOC-normalized parameters (e.g. specific UV254 absorbance - SUVA), but was clearly observed by using differential absorbance and fluorescence or ESI-FT-ICR-MS. In addition, we took a novel approach by identifying how optical parameters were correlated to the elemental composition of DOM by using rank correlation to connect optical properties to chemical formulas assigned to mass peaks from FT-ICR-MS analyses. Coagulation treatment selectively removed FDOM at longer emission wavelengths (450-600 nm), which significantly correlated with chemical formulas containing oxidized carbon (average carbon oxidation state ≥ 0), low hydrogen to carbon ratios (H/C: average ± SD = 0.83 ± 0.13), and abundant oxygen-con...Continue Reading

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Citations

Jul 13, 2018·Global Change Biology·Amelia FitchAndrew J Tanentzap
Jun 15, 2017·Scientific Reports·Alba María Martínez-PérezXosé Antón Álvarez-Salgado
Sep 22, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Nhamo ChaukuraThabo I Nkambule
Nov 29, 2020·The Science of the Total Environment·Yunlin ZhangWeining Zhu
Dec 21, 2020·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Francisco J Rodríguez-VidalAna Bellido-Fernández
Nov 9, 2020·Journal of Hazardous Materials·Josep SanchísMaria José Farré
Oct 26, 2018·The Science of the Total Environment·Clayton J WilliamsHelen M Baulch
Jun 15, 2021·Journal of Environmental Management·Hengfeng ZhangMawuli Dzakpasu
Nov 8, 2017·Environmental Science & Technology·Tallent DadiPeter Herzsprung
Sep 12, 2019·Environmental Science & Technology·Stephanie M BergChristina K Remucal
Jul 1, 2020·Environmental Science & Technology·Devon Manley Bulman, Christina K Remucal
May 26, 2017·Environmental Science & Technology·Mohamed AteiaTanju Karanfil
Jul 23, 2020·Environmental Science & Technology·Christina K RemucalUrs von Gunten

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