SPECIATION DYNAMICS OF TRACE METALS (Cd and Pb) IN AQUATIC SYSTEMS: EXPERIMENTS IN LABORATORY AND "ON-SITE"

• Grant number: 13/14122-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2014
• End date: April 30, 2017
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: André Henrique Rosa
• Grantee: Adnivia Santos Costa Monteiro
• Host Institution: Instituto de Ciência e Tecnologia. Universidade Estadual Paulista (UNESP). Campus de Sorocaba. Sorocaba , SP, Brazil

Abstract

The main objective of this project is to investigate the differences with respect to dynamics speciation of trace metals lead and cadmium with natural organic matter (NOM) and humic substances purified from this. The methods of speciation is often limited to equilibrium studies with compounds previously isolated and frequent high concentrations of doping with metals, other times it is required application of previous treatment for separation and/or pre- concentration, which may cause changes in the characteristics the original system. This project proposes the development of models which consider the dynamic aspects, proposing to implement a procedure using modern electroanalytical methods such as scanned stripping chronopotentiometry, (SSCP) and Absence of gradients and Nernstian equilibrium stripping (AGNES), for determining metals in low concentrations in natural samples and compare them with the results obtained using a known technique, such as ultrafiltration and subsequent detection by inductively coupled plasma - optical emission spectrometry (ICP OES). One important aspect of the project is the collaboration in the development and validation of an electrochemical probe on-site to minimize contamination that may be generated during the collection and storage of the sample, and promote cost reduction and total analysis time. Thus, this project may open a new perspective associated with dynamic speciation of metals in aquatic environments in a practical , fast and accurate.

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)

GONTIJO, ERIK SARTORI JEUNON; MONTEIRO, ADNIVIA SANTOS COSTA; TONELLO, PAULO SERGIO; ROESER, HUBERT MATHIAS PETER; FRIESE, KURT; ROSA, ANDRE HENRIQUE. Analyses of colloidal, truly dissolved, and DGT-labile metal species and phosphorus in mining area surrounded by tailing dams using self-organising maps. Chemosphere, v. 303, p. 9-pg., 2022-05-22. (12/17727-8, 13/14122-0, 19/06800-5)

JOSÉ PAULO PINHEIRO; ADNÍVIA SANTOS COSTA MONTEIRO; NOEMIE JANOT; BERT JAN GROENENBERG; ANDRÉ HENRIQUE ROSA. ESPECIAÇÃO TERMODINÂMICA DE METAIS TRAÇO COM SUBSTÂNCIAS HÚMICAS: O MODELO NICA-DONNAN. Química Nova, v. 40, n. 10, p. 1191-1203, 2017-10-00. (16/08215-4, 13/14122-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MONTEIRO, Adnivia Santos Costa. Speciation of lead and cadmium: development of electroanalytical methods to evaluate the influence of natural organic matter and humic substances. 2017. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Química. Araraquara Araraquara.