| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313407 |
| ISSN: | 0100-4042 |
| Authors: | Oliveira, Luciana Camargo de1 Serudo, Ricardo Lima Botero, Wander Gustavo Mendonca, Andre Gustavo Ribeiro Santos, Ademir dos Rocha, Julio Cesar Carvalho-Neto, Fernando da Silva |
| Institutions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Quimica de Araraquara, Araraquara, Sao Paulo. Brasil |
| Year: | 2007 |
| Season: | Abr |
| Volumen: | 30 |
| Number: | 2 |
| Pages: | 274-280 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Aplicado, descriptivo |
| English abstract | Soils play an important role in the biogeochemical cycle of mercury as a sink for and source of this metallic species to atmospheric and hydrological compartments. In the study reported here, various types of soil were evaluated to ascertain the influence of parameters such as pH, organic matter content, Fe, Al, sand, silt, clay, C/H, C/N, C/O atomic ratios, and cation exchange capacity on the distribution of Hg in Amazonia's mid-Negro River basin. The data obtained were interpreted by multivariate exploratory analyses (hierarchical cluster analysis and principal component analysis), which indicated that organic matter plays an important role in mercury uptake in the various soils studied. The soils in floodable areas were found to contain 1.5 to 2.8-fold higher Hg concentrations than those in non-floodable areas. Since these soils are flooded almost year-round, they are less available to participate in redox processes at the soil/atmosphere interface. Hence, floodable areas, which comprise humic-rich soils, accumulate more mercury than non-floodable soils, thus playing an important role in the biogeochemical cycle of Hg in Amazonia's mid-Negro River basin |
| Disciplines: | Geociencias |
| Keyword: | Geoquímica, Suelos, Mercurio, Materia orgánica, Ciclo biogeoquímico |
| Keyword: | Earth sciences, Geochemistry, Soils, Mercury, Organic matter, Biogeochemical cycle |
| Full text: | Texto completo (Ver HTML) |
