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Synthesis and application of modified polyvinyl chloride (PVC)to a solid phase extraction of Cu(II), Ni(II), Cd(II) and Pb(II), from aqueous samples

Grant number: 15/04791-8
Support type:Regular Research Grants
Duration: June 01, 2015 - May 31, 2017
Field of knowledge:Engineering - Chemical Engineering
Principal Investigator:Gustavo Rocha de Castro
Grantee:Gustavo Rocha de Castro
Home Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil


The development of adsorbent materials for further application in solid phase extraction procedures or metal preconcentration is an investigation field of chemical and chemical engineering that always kept highlighted due to need to monitor, to perform the matrix removal before analysis or to remove the sample contaminant. The direct determination of metals species existing in trace levels in natural water is generally difficult due to the presence of interfering species. The metals that will be determined, Cu(II), Cd(II), Ni(II) and Pb(II)are of environmental interest as a consequence of its widespread use and non degradability and may accumulate in compartments stating its toxicity. The aim of the present project is the use of polyvinyl chloride as solid support for the anchoring of a 4-amino-3hidrazino-5-mercapto-1,2,4-triazole molecule and its application in the preconcentration of metal species from aqueous samples. The developed material will be characterized through infrared spectroscopy (FTIR), nuclear magnetic resonance of 13C (NMR), surface area measuring (BET method),elemental analysis, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS)to attest the modification reaction occurrence. The material will be applied in adsorption studies to determine the maximum adsorption capacity, the optimum pH, the kinetics behavior and the influence of some interfering ions in the adsorption equilibrium. After adsorption experiments the material will be applied in the flow injection analysis (FIA) coupled to FAAS in order to determine Cu(II), Cd(II), Ni(II)and Pb(II)in water from Tietê River. The proposed method will be certified through the analysis of reference material of water (SEM 1643e) and sediment (IAEA-SL-1 and LKSD-3). (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)
IVASSECHEN, JANAINE DO ROCIO; JORGETTO, ALEXANDRE DE OLIVEIRA; PEREIRA WONDRACEK, MARCOS HENRIQUE; PERES DA SILVA, ADRIELLI CRISTINA; ZARA, LUIZ FABRICIO; PEDROSA, VALBER DE ALBUQUERQUE; ROCHA, BRUNO PRIOR; SAEKI, MARGARIDA JURI; CASTRO, GUSTAVO ROCHA. Adsorptive properties of mesoporous silica modified with Lewis base molecule and its application in the preconcentration of Cu(II), Co(II), and Cd(II) from aqueous media. TURKISH JOURNAL OF CHEMISTRY, v. 42, n. 2, p. 547-561, 2018. Web of Science Citations: 2.
WONDRACEK, MARCOS HENRIQUE P.; JORGETTO, ALEXANDRE OLIVEIRA; SILVA, ADRIELLI CRISTINA P.; IVASSECHEN, JANAINE DO ROCIO; SCHNEIDER, JOSE FABIAN; SAEKI, MARGARIDA JURI; PEDROSA, VALBER ALBUQUERQUE; YOSHITO, WALTER KENJI; COLAUTO, FABIANO; ORTIZ, WILSON A.; CASTRO, GUSTAVO ROCHA. Synthesis of mesoporous silica-coated magnetic nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and its application as Cu(II) adsorbent from aqueous samples. Applied Surface Science, v. 367, p. 533-541, MAR 30 2016. Web of Science Citations: 17.

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