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Study of Nanosize Phosphate Solubilization Dispersed in Matrices of Different Solubilities

Grant number: 13/11821-5
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2013
Effective date (End): March 01, 2018
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal researcher:Cauê Ribeiro de Oliveira
Grantee:Amanda Soares Giroto
Home Institution: Embrapa Instrumentação Agropecuária. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). São Carlos , SP, Brazil


With high agricultural productivity, it is necessary the chemical soil fertilization and phosphorus is among the major nutrients essential to plants. In this sense, the current demand for use of phosphates requires development of methods to rational use of this nutrient, seeking strategies to increase and control the solubility of the sources used, besides avoiding immobilization processes, coalescence or agglomeration, which would compromise the availability during the application process. Therefore, the proposal of this work is to obtain phosphate from the synthesis of nanometric hydroxyapatite (chosen here as a source model ion PO43-) and disperse it in different slow-release matrices in the form of nanocomposites for the final application of the material as granules. The nanoparticles in various sizes will be prepared by scalable techniques. It will be dispersed scattered into matrices with different degrees of solubility in water and soil suitable for large scale continuous processing, which demonstrate the influence of diffusional processes in the matrix in an adequate control of the solubility of the material. The analysis will be performed by X-ray diffraction, scanning electron microscopy, BET area, particle size distribution and thermal analysis, observing factors such as particle amorphization and increased roughness, which might influence the solubility pattern, in order to outline the main strategies for obtaining a new class of phosphate fertilizers in efficient scale.

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Scientific publications (12)
(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)
KLAIC, RODRIGO; GUIMARAES, GELTON G. F.; GIROTO, AMANDA S.; BERNARDI, ALBERTO C. C.; ZANGIROLAMI, TERESA C.; RIBEIRO, CAUE; FARINAS, CRISTIANE S. Synergy of Aspergillus niger and Components in Biofertilizer Composites Increases the Availability of Nutrients to Plants. Current Microbiology, v. 78, n. 4 MAR 2021. Web of Science Citations: 0.
GIROTO, AMANDA S.; DO VALLE, STELLA F.; GUIMARAES, GELTON G. F.; MOLINA, ARTHUR; REIS, HEITOR P. G.; FERNANDES, DIRCEU M.; BERNARDI, ALBERTO C. C.; MATTOSO, LUIZ H. C.; RIBEIRO, CAUE. Tailoring Efficient Materials for NPK All-in-One Granular Fertilization. Industrial & Engineering Chemistry Research, v. 59, n. 41, p. 18387-18395, OCT 14 2020. Web of Science Citations: 0.
GIROTO, AMANDA S.; GARCIA, RODRIGO H. S.; COLNAGO, LUIZ A.; KLAMCZYNSKI, ARTUR; GLENN, GREG M.; RIBEIRO, CAUE. Role of urea and melamine as synergic co-plasticizers for starch composites for fertilizer application. International Journal of Biological Macromolecules, v. 144, p. 143-150, FEB 1 2020. Web of Science Citations: 0.
GIROTO, AMANDA S.; GUIMARAES, GELTON G.; COLNAGO, LUIZ A.; KLAMCZYNSKI, ARTUR; GLENN, GREG; RIBEIRO, CAUE. Controlled release of nitrogen using urea-melamine-starch composites. JOURNAL OF CLEANER PRODUCTION, v. 217, p. 448-455, APR 20 2019. Web of Science Citations: 1.
VALLE, STELLA F.; GIROTO, AMANDA S.; KLAIC, RODRIGO; GUIMARAES, GELTON G. F.; RIBEIRO, CAUE. Sulfur fertilizer based on inverse vulcanization process with soybean oil. Polymer Degradation and Stability, v. 162, p. 102-105, APR 2019. Web of Science Citations: 6.
KLAIC, RODRIGO; GIROTO, AMANDA S.; GUIMARAES, GELTON G. F.; PLOTEGHER, FABIO; RIBEIRO, CAUE; ZANGIROLAMI, TERESA C.; FARINAS, CRISTIANE S. Nanocomposite of starch-phosphate rock bioactivated for environmentally-friendly fertilization. MINERALS ENGINEERING, v. 128, p. 230-237, NOV 2018. Web of Science Citations: 1.
GUIMARAES, GELTON G. F.; KLAIC, RODRIGO; GIROTO, AMANDA S.; MAJARON, VINICIUS F.; AVANSI, JR., WALDIR; FARINAS, CRISTIANE S.; RIBEIRO, CAUE. Smart Fertilization Based on Sulfur-Phosphate Composites: Synergy among Materials in a Structure with Multiple Fertilization Roles. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v. 6, n. 9, p. 12187-12196, SEP 2018. Web of Science Citations: 3.
GIROTO, A. S.; GUIMARES, G. G. F.; RIBEIRO, C. A Novel, Simple Route to Produce Urea:Urea-Formaldehyde Composites for Controlled Release of Fertilizers. JOURNAL OF POLYMERS AND THE ENVIRONMENT, v. 26, n. 6, p. 2448-2458, JUN 2018. Web of Science Citations: 3.
FERNANDES GUIMARAES, GELTON GERALDO; GIROTO, AMANDA SOARES; TEIXEIRA, BRENO CARDOSO; VERGUTZ, LEONARDUS; CANTARUTTI, REINALDO BERTOLA. Functionalized Charcoal as a Buffering Matrix of Copper and Zinc Availability. Revista Brasileira de Ciência do Solo, v. 42, 2018. Web of Science Citations: 0.
GIROTO, AMANDA S.; GUIMARAES, GELTON G. F.; FOSCHINI, MILENE; RIBEIRO, CAUE. Role of Slow-Release Nanocomposite Fertilizers on Nitrogen and Phosphate Availability in Soil. SCIENTIFIC REPORTS, v. 7, APR 13 2017. Web of Science Citations: 18.
NOGUEIRA, ANDRE E.; GIROTO, AMANDA S.; NETO, ARQUIMINIO B. S.; RIBEIRO, CAUE. CuO synthesized by solvothermal method as a high capacity adsorbent for hexavalent chromium. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v. 498, p. 161-167, JUN 5 2016. Web of Science Citations: 12.
GIROTO, A. S.; FIDELIS, S. C.; RIBEIRO, C. Controlled release from hydroxyapatite nanoparticles incorporated into biodegradable, soluble host matrixes. RSC ADVANCES, v. 5, n. 126, p. 104179-104186, 2015. Web of Science Citations: 9.

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Filed patent(s) as a result of this research project

Solicitação em análise e dentro do prazo legal de sigilo previsto na legislação BR1020180695495 - Universidade Federal de São Carlos (UFSCAR) . Solicitação em análise e dentro do prazo legal de sigilo previsto na legislação - September 2018, 25