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http://hdl.handle.net/10773/11232
Título: | Effect of organic matter on determination of reactive mercury in contaminated waters |
Autor: | Ramalhosa, E. Segade, S. R. Pereira, E. Vale, C. Duarte, A. |
Palavras-chave: | Reactive Mercury Organic Matter Flow Injection Cold Vapour Atomic Fluorescence Spectrometry Natural Waters |
Data: | 2003 |
Editora: | Taylor & Francis |
Resumo: | Dissolved reactive mercury was determined in water samples from Ria da Aveiro, a coastal lagoon contaminated by mercury. Concentrations increased with acid dilution to a maximum of 193% in samples containing organic matter with high aromaticity, as inferred from absorbances at 250, 280 and 365 nm. Laboratory experiments with potassium hydrogenoftalate and humic acids solutions proved the influence of aromaticity in complexing mercury, how acid dilution protonates the aromatic Hg-complexes and consequent release of labile forms of mercury to solution. On the basis of these results it is proposed that natural waters from mercury contaminated ecosystems should be analysed without dilutions, otherwise additional studies should be performed to access the protonation of mercury organic complexes. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/11232 |
DOI: | 10.1080/0306731021000053757 |
ISSN: | 0306-7319 |
Aparece nas coleções: | DBio - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Effect of Organic Matter.pdf | 166.61 kB | Adobe PDF |
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