XRD modeling and peak decomposition procedures applied to the study of clay minerals in Brazilian mangrove soils

• Grant number: 13/17571-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: November 01, 2013
• End date: February 28, 2014
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Pablo Vidal Torrado
• Grantee: Gabriel Ramatis Pugliese Andrade
• Supervisor: Javier Cuadros
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: Natural History Museum, London, England
• Associated to the scholarship: 11/13924-0 - Genesis and characterization of clay minerals from mangrove soils of Brazilian coast, BP.DR

Abstract

The characterization of soil mineralogy is quite useful to provide important information regarded to mineral transformation in soil environments, chemical reactivity and to soil genesis processes related. In Brazil mangrove soils present a complex composition which usually includes several discrete clay minerals species mixed to interstratified phases. Despite of current general characterizations performed in some Brazilian mangroves, the simple analysis of mineralogical data is not assertive in relation to detailed crystal chemistry features of each component of these complex assemblages. The use of computational techniques to analyze XRD patterns and thermal data of clay minerals is therefore the best alternative in this sense. This proposal aims to apply XRD modeling processes (using the computer program NEWMOD II) to study crystal chemistry aspects of irregular interstratified phases in fine fraction of mangrove soils from Brazilian coast (from experimental data already yielded in Brazil). In addition decomposition procedures will be also applied to XRD peaks (00l basal and 060 peaks) and to thermal data in order to discriminate the several phases compounding the signatures of such data. These procedures will be performed in Natural History Musem of London, United Kingdom. From these results it is expected to improve the acknowledgment of mineral composition, soil chemical reactivity and the relation of mineral transformations to soil genesis processes in mangrove soils. (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)

ANDRADE, GABRIEL R. P.; CUADROS, JAVIER; PARTITI, CARMEN S. M.; COHEN, RENATO; VIDAL-TORRADO, PABLO. Sequential mineral transformation from kaolinite to Fe-illite in two Brazilian mangrove soils. Geoderma, v. 309, p. 84-99, JAN 1 2018. (11/13924-0, 09/51453-0, 13/17571-0)

PUGLIESE ANDRADE, GABRIEL RAMATIS; CUADROS, JAVIER; PENICHE BARBOSA, JORGE MARCOS; VIDAL-TORRADO, PABLO. Clay minerals control rare earth elements (REE) fractionation in Brazilian mangrove soils. CATENA, v. 209, n. 2, FEB 2022. (13/17571-0, 09/51453-0, 11/13924-0)

CUADROS, JAVIER; ANDRADE, GABRIEL; FERREIRA, TIAGO OSORIO; DE MOYA PARTITI, CARMEN SILVIA; COHEN, RENATO; VIDAL-TORRADO, PABLO. The mangrove reactor: Fast clay transformation and potassium sink. APPLIED CLAY SCIENCE, v. 140, p. 50-58, MAY 2017. (09/51453-0, 13/17571-0, 11/13924-0)