Artículos de revistas
Characterization And Comparison Of Riverine, Lacustrine, Marine And Estuarine Dissolved Organic Matter By Ultra-high Resolution And Accuracy Fourier Transform Mass Spectrometry
Registro en:
Organic Geochemistry. Pergamon-elsevier Science Ltd , v. 101, p. 99 - 107, 2016.
0146-6380
WOS:000386932200009
10.1016/j.orggeochem.2016.08.005
Autor
Melendez-Perez
Jose J.; Martinez-Mejia
Monica J.; Awan
Almas Taj; Fadini
Pedro S.; Mozeto
Antonio A.; Eberlin
Marcos Nogueira
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) 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. 101 99 107 Sao Paulo Research Foundation (FAPESP), Brazil [2013/15644-0] National Council of Technological and Scientific Development (CNAPq), Brazil Coordination for the Improvement of Higher Level of Education Personnel (CAPES), Brazil [PNPD/CAPES 3093/2010] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)