Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spray-dried potassium nitrate-containing chitosan/montmorillonite microparticles as potential enhanced efficiency fertilizer

Full text
Author(s):
Messa, Lucas Luiz [1, 2] ; Souza, Claudinei Fonseca [3] ; Faez, Roselena [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, UFSCar, Lab Polymer Mat & Biosorbents, BR-13600970 Araras, SP - Brazil
[2] Univ Sao Paulo, FZEA, Grad Program Mat Sci & Engn, BR-13635900 Pirassununga, SP - Brazil
[3] Univ Fed Sao Carlos, UFSCar, Res Grp Water Soil & Environm Engn, BR-13600970 Araras, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Polymer Testing; v. 81, JAN 2020.
Web of Science Citations: 1
Abstract

We developed a novel enhanced efficiency fertilizer based on chitosan (Cs) and montmorillonite clay (MMt) microparticles to prolong the potassium nitrate release. Potassium nitrate-containing chitosan/montmorillonite microparticles were obtained by spray drying technique and sodium tripolyphosphate (1 and 5% of TPP) was used to crosslink the Cs to improve the release properties. The potassium release characteristics of the microparticles in water and soil were determined. We observed a decrease in the swelling ability of the chitosan for crosslinked microparticles with 5% of TPP by 52% and, consequently a reduction in the nutrient release. The kinetic release mechanism of potassium for non-crosslinked and crosslinked microparticles with 1% of TPP involved both intraparticle diffusion and surface diffusion, while the microparticles crosslinked with 5% of TPP was controlled by swelling. The microparticles were capable of maintaining higher concentrations of potassium in the soil during long periods (up to several weeks). The microparticles have great potential for applications in agriculture based on its release efficiency. (AU)

FAPESP's process: 14/06566-9 - Hybrid polymers for nutrients release: preparation, characterization and in situ evaluation of nutrients release in the soil
Grantee:Roselena Faez
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 14/09045-0 - Chitosan-Clay hybrid materials for encapsulation of fertilizers: preparation and characterization of controlled release microspheres
Grantee:Lucas Luiz Messa
Support Opportunities: Scholarships in Brazil - Scientific Initiation