|Support type:||Scholarships in Brazil - Master|
|Effective date (Start):||March 01, 2012|
|Effective date (End):||August 31, 2013|
|Field of knowledge:||Physical Sciences and Mathematics - Chemistry - Analytical Chemistry|
|Principal Investigator:||Amauri Antonio Menegário|
|Grantee:||Monizze Vannuci e Silva|
|Home Institution:||Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil|
Marine ecosystems near to the continent are very sensitive to local environmental changes, where biodiversity is extremely significant, with several species of economic importance and used for human consumption. Determination of metals in areas where the marine ecosystem and human activities are intersected and connected is extremely important to evaluate interference and modifications that man cause in these environments. The determination of metals in aquatic organisms has been widely used, mainly by bivalves, providing important data on the bioavailability of these contaminants. The technique of Diffusive Gradients in Thin Films (DGT) has also been employed to assess the concentration of metals in freshwater and marine water, determining the lability these potential pollutants. Aiming to compare diferents techniques, this project will be carried out in the Bay of Ilha Grande, RJ, using transplanted Nodipecten nodosus ("scallop") and the DGT technique for the determination of Al, Cd, Co, Cu, Mn, Ni, Pb and Zn. The scallops will be obtained from a breeding farm, and the animals used in experiments will have homogeneous size. The DGTs will be assembled with Chelex-100 resin as binding agent, diffusion gel of agarose-polyacrylamide and membrane filter of cellulose acetate. The scallops and DGTs will be immersed in three sampling points within the bay in two periods (summer and winter). The metals will be determined by ICP OES and / or ICP-MS. From statistical analysis and interpretation of results, correlations will be established between the bioavailable and labile fractions of analytes.