Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/56940
Type: Artigo de Periódico
Title: Potential slow release fertilizers based on K2MgSiO4 obtained from serpentinite
Authors: Fabiane Carvalho Ballotin
Wedisson Oliveira Santos
Edson Marcio Mattiello
Ottavio Raul Domenico Riberti Carmignano
Ana Paula de Carvalho Teixeira
Rochel Montero Lago
Abstract: In this work, a potassium magnesium silicate mineral based on phase K2MgSiO4 was prepared from serpentinite rock and studied as a potential K and Mg slow-release fertilizer. The material was prepared by impregnation of serpentinite/KOH and calcination at 700 °C to produce K2MgSiO4 phase, olivine and forsterite. The release patterns of K and Mg in the stirred-flow trial and leaching through the soil columns showed that K2MgSiO4-based materials released K on lower rates than KCl and MgSO4.7H2O, however, there was no evidence of Mg release. The extraction with 1 mol L-1NH4OAc showed a considerable content of Mg and K for K2MgSiO4-based materials, due to exchange of NH4+ and Mg2+. X-ray diffraction (XRD) analysis of materials impregnated with K and calcined showed peaks relative to K2MgSiO4. After leaching, the peaks intensity diminished, supporting that part of K leached. Therefore, the samples showed great potential as slow-release K-fertilizers when compared with KCl source.
Subject: Fertilizantes potássicos
Potássio
Raios X - Difração
language: eng
metadata.dc.publisher.country: Brasil
Publisher: Universidade Federal de Minas Gerais
Publisher Initials: UFMG
metadata.dc.publisher.department: ICX - DEPARTAMENTO DE QUÍMICA
Rights: Acesso Aberto
metadata.dc.identifier.doi: http://dx.doi.org/10.21577/0103-5053.20190229
URI: http://hdl.handle.net/1843/56940
Issue Date: 2019
metadata.dc.url.externa: https://jbcs.sbq.org.br/default.asp?ed=297
metadata.dc.relation.ispartof: Journal of the Brazilian Chemical Society
Appears in Collections:Artigo de Periódico

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