Photochemistry Illuminates Ubiquitous Organic Matter Fluorescence Spectra

Environmental Science & Technology
Kathleen R MurphyColin A Stedmon

Abstract

Dissolved organic matter (DOM) in aquatic environments forms a vast reservoir of carbon present as a complex supermixture of compounds. An efficient approach to tracking the production and removal of specific DOM fractions is needed across disciplines, for purposes that range from improving global carbon budgets to optimizing water treatment in engineered systems. Although widely used to study DOM, fluorescence spectroscopy has yet to deliver specific fractions with known spectral properties and predictable distributions. Here, we mathematically isolate four visible-wavelength fluorescent fractions in samples from contrasting lake, river, and ocean environments. Using parallel factor analysis (PARAFAC), we show that most measured fluorescence in environmental samples can be explained by ubiquitous spectra with nearly stable optical properties and photodegradation behaviors over environmental pH gradients. Sample extraction changed bulk fluorescence spectra but not the number or shape of underlying PARAFAC components, while photobleaching preferentially removed the two longest-wavelength components. New approaches to analyzing fluorescence data sets incorporating these findings should improve the interpretation of DOM fluorescen...Continue Reading

References

May 21, 2009·Environmental Science & Technology·Erin S BoyleNeil V Blough
Mar 3, 2011·Environmental Science & Technology·Kathleen R MurphyStuart J Khan
Aug 14, 2012·Annual Review of Marine Science·Dennis A Hansell
May 9, 2014·Proceedings of the National Academy of Sciences of the United States of America·Craig E Nelson, Emma K Wear
Aug 26, 2014·Environmental Science & Technology·A StubbinsP A del Giorgio
Sep 6, 2015·Water Research·Stephen A TimkoWilliam J Cooper
Mar 10, 2016·Proceedings of the National Academy of Sciences of the United States of America·Mary Ann MoranJacob R Waldbauer
Oct 11, 2016·Environmental Science. Processes & Impacts·Kristopher McNeill, Silvio Canonica
Jul 22, 2018·Environmental Science & Technology·Garrett McKayFernando L Rosario-Ortiz

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Citations

Oct 3, 2019·Environmental Science. Processes & Impacts·Ania S Pavitt, Paul G Tratnyek
Jul 10, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Sikelelwa N NdiweniThabo T I Nkambule
Jan 23, 2019·Frontiers in Microbiology·Luis SilvaXosé Anxelu G Morán
Nov 29, 2020·The Science of the Total Environment·Yunlin ZhangWeining Zhu
Dec 22, 2020·Water Research·Urban J Wünsch, Kathleen Murphy
Jan 2, 2021·The Science of the Total Environment·Kaikai ZhangYanrong Zhang
Jan 21, 2020·The Science of the Total Environment·Verónica GranadosAndrea Butturini
Jul 10, 2021·Environmental Science & Technology·Morimaru KidaThorsten Dittmar
Jul 13, 2021·Environmental Science & Technology·Regina Krachler, Rudolf F Krachler
Apr 4, 2020·Environmental Science & Technology·Chen QianHan-Qing Yu
Oct 24, 2020·Environmental Science & Technology·Xiaohui ZhuCédric G Fichot

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