In situ chemical fractionation and speciation analysis using the diffusive gradients in thin films technique (DGT)

• Grant number: 12/09140-7
• Support Opportunities: Regular Research Grants
• Start date: August 01, 2012
• End date: July 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Amauri Antonio Menegário
• Grantee: Amauri Antonio Menegário
• Host Institution: Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• City of the host institution: Rio Claro
• Associated researchers: Camila Destro Colaço ; Carlos Alfredo Suárez ; Didier Gastmans ; Lauren Nozomi Marques Yabuki ; Monizze Vannuci e Silva ; Roberto Naves Domingos ; Rodrigo Lopes Ferreira de Oliveira ; Thays Valentim de Simone

Abstract

The main goal of this project is to implement researches able to give basic and reliable information for environment studies. Sensitive and selective methods (based on diffusive gradients in thin films technique) for in situ fractionation and speciation analysis in aquatic system will be developed. The studies for fractionation will cover the determination of labile, inorganic and/or organic fractions of Al, Cd, Co, Cu, Mn, Ni, Pb, Zn and it will be performed, generally, by using conventional DGT materials. For speciation analysis, experiments based on use of DGT, DET (Diffusive Equilibrium in Thin Films) will be performed. Also approaches based on use of selective binding agents will be used. Species of As, Hg, Cr, P, Pb, S, Sb, Se, Sn and U are the mains analytes. After the iterations between the binding agent and the analytes (and the possibility for speciation analysis) have been known, the studies will focus the evaluation the effect of pH, ionic strength and deployment time. Also tests to evaluate the effect of the interfering species and the accuracy of the proposed approaches for analysis of river water will be evaluated. Finally, the proposed DGT devices will be applied for in situ analysis (sea and river water). The prospect to analyze sediment and soils sample will be evaluated.Despite research based on DGT technique will be the major focus in this project, other techniques for speciation analysis and fractionation will be used. For example: hyphenated techniques (for speciation analysis), solid phase extraction and use of biomonitors (for fractionation). The main areas of studies for application of the proposed approaches are aquatic system from Amazon basin (Amazonas, Brazil), Corumbataí basin (São Paulo, Brazil) and near to mining areas (mainly U, Minas Gerais, Brazil). Deployments in marine environment will be performed southeast of Brazil (São Paulo and Rio de Janeiro). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VANNUCI-SILVA, MONIZZE; DE SOUZA, JOAO M.; DE OLIVEIRA, FABIO FRANCISCO; DE ARAUJO, JR., MARCUS A. G.; FRANCIONI, ELEINE; EISMANN, CARLOS EDUARDO; KIANG, CHANG H.; GOVONE, JOSE S.; BELZUNCE-SEGARRA, MARIA J.; MENEGARIO, AMAURI ANTONIO. Bioavailability of Metals at a Southeastern Brazilian Coastal Area of High Environmental Concern Under Anthropic Influence: Evaluation Using Transplanted Bivalves (Nodipecten nodosus) and the DGT Technique. WATER AIR AND SOIL POLLUTION, v. 228, n. 6, JUN 2017. (12/09140-7, 11/16579-2)

DE SOUZA, JOAO M.; MENEGARIO, AMAURI A.; DE ARAUJO JUNIOR, MARCUS A. G.; FRANCIONI, ELEINE. Measurements of labile Cd, Cu, Ni, Pb, and Zn levels at a northeastern Brazilian coastal area under the influence of oil production with diffusive gradients in thin films technique (DGT). Science of The Total Environment, v. 500, p. 325-331, DEC 1 2014. (12/09140-7)