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    In situ fluorescence measurements of dissolved organic matter: a review

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    Publication date
    2020-01
    Author
    Carstea, E.M.
    Popa, C.L.
    Baker, A.
    Bridgeman, John
    Keyword
    Field fluorimeters
    Surface water
    Groundwater
    Engineered water systems
    Dissolved organic matter
    Rights
    © 2019 Elsevier B.V. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    
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    Abstract
    There is a need for an inexpensive, reliable and fast monitoring tool to detect contaminants in a short time, for quick mitigation of pollution sources and site remediation, and for characterization of natural dissolved organic matter (DOM). Fluorescence spectroscopy has proven to be an excellent technique in quantifying aquatic DOM, from autochthonous, allochthonous or anthropogenic sources. This paper reviews the advances in in situ fluorescence measurements of DOM and pollutants in various water environments. Studies have demonstrated, using high temporal-frequency DOM fluorescence data, that marine autochthonous production of DOM is highly complex and that the allochthonous input of DOM from freshwater to marine water can be predicted. Furthermore, river measurement studies found a delayed fluorescence response of DOM following precipitation compared to turbidity and discharge, with various lags, depending on season, site and input of dissolved organic carbon (DOC) concentration. In addition, research has shown that blue light fluorescence (λemission = 430–500 nm) can be a good proxy for DOC, in environments with terrestrial inputs, and ultraviolet fluorescence (λemission = UVA–320–400 nm) for biochemical oxygen demand, and also E. coli in environments with sanitation issues. The correction of raw fluorescence data improves the relationship between fluorescence intensity and these parameters. This review also presents the specific steps and parameters that must be considered before and during in situ fluorescence measurement session for a harmonized qualitative and quantitative protocol. Finally, the strengths and weaknesses of the research on in situ fluorescence are identified.
    URI
    http://hdl.handle.net/10454/17254
    Version
    Accepted manuscript
    Citation
    Carstea EM, Popa CL, Baker A et al (2020) In situ fluorescence measurements of dissolved organic matter: a review. Science of the Total Environment. 699: 134361.
    Link to publisher’s version
    https://doi.org/10.1016/j.scitotenv.2019.134361
    Type
    Article
    Collections
    Engineering and Informatics Publications

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