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Synthesis and study of colloidal and surface properties of aluminum pillared smectite

Grant number: 12/19270-5
Support type:Scholarships in Brazil - Master
Effective date (Start): December 01, 2012
Effective date (End): January 31, 2014
Field of knowledge:Agronomical Sciences - Agronomy
Principal Investigator:Antonio Carlos de Azevedo
Grantee:Lucas Resmini Sartor
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil


The use of techniques capable to modify the chemical and structural properties of clay minerals, mainly phyllosilicates, is broadly employed in the chemical industry, also offering application in the agricultural and environmental areas. In this context, may be highlighted the expandable 2:1 phyllosilicates, widely used due to their remarkable surface properties. In soil, these clay minerals can naturally form hydroxy polymer interlayered materials, process that can be carry out in laboratory by the method of pillaring, which make possible introduce hidroxy polymers into interlayer of 2:1 clay minerals, followed by calcination.This process promotes high potential application to the modified clays due to changes in their surface properties, providing high adsorption and heterogeneous catalysis capacities. In order to study the colloidal and surface properties of pillared clays, using aluminum as the precursor of the pillaring agent, will be used potentiometric titration, X-ray diffraction, X-ray fluorescence and Fourier transform infrared spectroscopy and determination of cation exchange capacity and specific surface area, with the objective of 1) study the colloidal and surface properties of aluminum pillared smectite; 2) develop/adjust titration technique of clay mineral to characterize the surface functional groups of the phylossilicates in order to evaluate the reactivity of clay minerals with the process of pillarization, 3) evaluate the viability of using pillared clays originating from national bentonite deposit as material for agricultural and environmental uses.

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)
SARTOR, LUCAS RESMINI; DE AZEVEDO, ANTONIO CARLOS; PUGLIESE ANDRADE, GABRIEL RAMATIS. Study of colloidal properties of natural and Al-pillared smectite and removal of copper ions from an aqueous solution. ENVIRONMENTAL TECHNOLOGY, v. 36, n. 6, p. 786-795, MAR 19 2015. Web of Science Citations: 2.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SARTOR, Lucas Resmini. Synthesis and study of colloidal properties of an aluminum polyhydroxy cation pillared smectite. 2014. Master's Dissertation - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz Piracicaba.

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