Unveiling the Role of Polysulfide Matrices in Phosphate Diffusion for Controlled Release Fertilizers

Autor(es)

Valle, Stella F. ; Giroto, Amanda S. ; Ribeiro, Caue

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED POLYMER MATERIALS; v. 5, n. 9, p. 9-pg., 2023-08-16.

Resumo

Phosphaterock and struvite (ST) dispersion in a polysulfide (PS)matrix offers a sustainable alternative for phosphorous (P) fertilization,as it can favor P dissolution and control its release, while alsobeing a sulfur fertilizer. Herein, we discuss the PS permeabilitymechanism as well as the chemical and structural factors that affectP diffusion from PS composites. SEM and contact angle showed thatP particles increased PS porosity and hydrophilicity, which favorsP release. Within 7 days in soil, Fe-oxide papers revealed that theP-diffusion diameter was only 0.3 cm for ST against up to 2.3 cm fromthe PS composite. In 28 days, available P in soil from the apatiteincreased from 6 to up to 79 mg/dm(3) due to its dispersionin PS. In the adapted Ussing Chamber permeability test, PS displayedhigher affinity toward anion permeability and a negligible cationdiffusion, which might contribute to the gradual P release and higheravailability in soil. (AU)

• Processo FAPESP: 21/13645-6 - Investigação de polímero de poli (glicerol-citrato) como revestimento protetor para aumentar o efeito de inoculação microbiana em plantas de soja
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 18/10104-1 - Preparação de Nanocompósitos a partir de Ureia modificada com Glicerol para otimização do Processo de Liberação Controlada de Nutrientes
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado