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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characterization and comparison of riverine, lacustrine, marine and estuarine dissolved organic matter by ultra-high resolution and accuracy Fourier transform mass spectrometry

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Author(s):
Melendez-Perez, Jose J. ; Martinez-Mejia, Monica J. ; Awan, Almas Taj ; Fadini, Pedro S. ; Mozeto, Antonio A. ; Eberlin, Marcos Nogueira
Total Authors: 6
Document type: Journal article
Source: Organic Geochemistry; v. 101, p. 99-107, NOV 2016.
Web of Science Citations: 9
Abstract

Dissolved organic matter (DOM) is an important component in the global carbon cycle and knowledge of its chemical composition is crucial for understanding its role in biogeochemical cycles and its interaction with pollutants in aquatic systems. Changes in DOM could drastically affect carbon fluxes, and the toxicity and distribution of pollutants. This study reports DOM characterization and comparison by ultra-high resolution and accuracy Fourier transformed ion cyclotron resonance mass spectrometry (FT-ICR-MS) of samples from an estuarine, a marine, a riverine and a lacustrine system of southeastern Brazil (SE Brazil). The MS screening of DOM showed ions corresponding to several classes of constituents such as synthetic surfactants, lignins, lipids and sulfur polyoxygenated (CHOS) constituents. The CHOS constituents and the synthetic surfactants displayed higher abundance for riverine and lacustrine samples which have higher human impact than the marine and estuarine samples. We hypothesized that these CHOS compounds are formed in situ by the addition of inorganic sulfur anions such as sulfide or bisulfide to lignin derived compounds via Kraft reactions. (C) 2016 Published by Elsevier Ltd. (AU)

FAPESP's process: 13/15644-0 - Use of ultrahigh resolution and accurate mass spectrometry techniques in marine organic: characterization of dissolved organic matter in the estuary-lagoon system of Cananéia-Iguape and comparison with other environments in São Paulo state.
Grantee:Jose Javier Melendez Perez
Support Opportunities: Scholarships in Brazil - Doctorate