Repositório Institucional da Universidade de Aveiro > Departamento de Química > DQ - Artigos >
 Study of the effect of pH, salinity and DOC on fluorescence of synthetic mixtures of freshwater and marine salts
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6809

title: Study of the effect of pH, salinity and DOC on fluorescence of synthetic mixtures of freshwater and marine salts
authors: Esteves, Valdemar I.
Santos, Eduarda B. H.
Duarte, Armando C.
issue date: 1999
publisher: Royal Society of Chemistry
abstract: In order to provide support for the discussion of the fate of organic matter in estuaries, a laboratory simulation was performed by changing freshwater ionic strength, pH and organic matter content. The change in spectroscopic characteristics caused by variations in salinity, pH and organic matter concentration in the filtered samples was observed by UV-Vis and fluorescence spectroscopy. The increase in emission fluorescence intensity of dissolved organic matter (DOM) due to increasing salinity (in the range 0 to 5 g l−1) is affected by the pH of the samples. The emission fluorescence intensity at the three maxima observed in the fluorescence spectra, is linearly correlated with dissolved organic carbon (DOC) concentration at several salinity values in the same sample. The increase in organic matter concentration caused a shift in the emission peak wavelength at 410 nm for several salinity values.We concluded that it is necessary to take into account the influence of salinity and pH on emission fluorescence of dissolved organic matter if it is to be used as a tracer in estuarine or near shore areas.
URI: http://hdl.handle.net/10773/6809
ISSN: 1464-0325
publisher version/DOI: http://dx.doi.org/10.1039/A902529D
source: Journal of Environmental Monitoring
appears in collectionsDQ - Artigos
PT Mar - Artigos
Ria - Artigos

files in this item

file description sizeformat
Fluorescence_JEM.pdf114 kBAdobe PDFview/open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! RCAAP OpenAIRE DeGóis
ria-repositorio@ua.pt - Copyright ©   Universidade de Aveiro - RIA Statistics - Powered by MIT's DSpace software, Version 1.6.2