Characterization of the physical environment, geochemistry of Fe and s and dynamics of mineral alteration on hypersaline tidal flats of Brazilian coastline

• Grant number: 14/11776-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: January 01, 2015
• End date: February 28, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Tiago Osório Ferreira
• Grantee: Lucas Resmini Sartor
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated scholarship(s): 16/09024-8 - X-ray diffraction modeling and electron microscopy techniques applied to the study of minerals in hypersaline soils, BE.EP.DR

Abstract

Apicum is a term used to designate coastal ecosystems (hypersaline tidal flats) commonly found in more elevated topographic position than mangroves, and commonly distributed along the Brazilian coastline. These areas exhibit a particular hidrogeochemical dynamics due to their position in the landscape, where the evaporation overcomes the precipitation, inducing the formation of a hypersaline environment in most of the year. Despite of the ecological importance of apicuns, there are no specific studies related to its soils and geochemical processes. This project aims to study the soil distribution, the mineralogical assemblage (clay minerals) and the geochemical processes in soils environment of hypersaline flats (apicum) located on south, southwest and northwest regions of Brazilian coastline, in order to elucidate aspects related to soil and mineral genesis and geochemical dynamics of Fe and S. For this purpose, three areas were chosen to carry out the study (Florianópolis-SC, Guaratiba-RJ and Amontada-CE). Quantitative and qualitative mineralogical analysis will be performed using X-ray diffraction analysis, scanning and transmission electron microscopy with energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, one dimensional XRD modeling (program NEWMOD), crystallographic assessment of clay phases and mineral dissolution experiments. Soil genesis studies will be performed by soil physical, chemical and morphological characterizations, whereas the geochemical dynamics of Fe and S will be assessed by sequential extraction procedures. The set of information that will be provided by this work is certainly unpublished in the scientific literature and will encourage and support new researches on the ecosystems related to hypersaline tidal flats (apicum) (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)

SARTOR, LUCAS RESMINI; GRAHAM, ROBERT C.; YING, SAMANTHA C.; LUIS OTERO, XOSE; MONTES, CELIA REGINA; FERREIRA, TIAGO OSORIO. Role of Redox Processes in the Pedogenesis of Hypersaline Tidal Flat Soils on the Brazilian Coast. Soil Science Society of America Journal, v. 82, n. 5, p. 1217-1230, SEP-OCT 2018. (16/09024-8, 16/21026-6, 14/11776-2)

SARTOR, LUCAS RESMINI; GRAHAM, ROBERT C.; YING, SAMANTHA C.; ANDRADE, GABRIEL R. P.; MONTES, CELIA REGINA; FERREIRA, TIAGO OSORIO. Are hypersaline tidal flat soils potential silicon sinks in coastal wetlands?. Geoderma, v. 337, p. 215-224, MAR 1 2019. (14/11776-2, 16/09024-8, 16/21026-6)

Academic Publications

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

SARTOR, Lucas Resmini. Pedogenesis, clay mineralogy, and silicon geochemistry in hypersaline tidal flat soils on the Brazilian coast. 2018. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.