Data/hora: 05/06/2024 01:13:03

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 02/10/2023
Data da última atualização: | 15/01/2024
Autoria: | VALLE, S. F.; GIROTO. A. S.; RIBEIRO, C.
Afiliação: | Department of Chemistry, Federal University of São Carlos; Embrapa Instrumentation; CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Título: | Unveiling the Role of Polysulfide Matrices in Phosphate Diffusion for Controlled Release Fertilizers.
Ano de publicação: | 2023
Fonte/Imprenta: | ACS Applied Polymer Materials, vol. 5, 2023.
Páginas: | 6941–6949
ISSN: | 2637-6105
DOI: | https://doi.org/10.1021/acsapm.3c00988
Idioma: | Inglês
Conteúdo: | Phosphate rock 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 also being a sulfur fertilizer. Herein, we discuss the PS permeability mechanism as well as the chemical and structural factors that affect P diffusion from PS composites. SEM and contact angle showed that P particles increased PS porosity and hydrophilicity, which favors P release. Within 7 days in soil, Fe-oxide papers revealed that the Pdiffusion diameter was only 0.3 cm for ST against up to 2.3 cm from the PS composite. In 28 days, available P in soil from the apatite increased from 6 to up to 79 mg/dm3 due to its dispersion in PS. In the adapted Ussing Chamber permeability test, PS displayed higher affinity toward anion permeability and a negligible cation diffusion, which might contribute to the gradual P release and higher availability in soil.
Palavras-Chave: | Controlled release; Inverse vulcanization; Polysulfide.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (18286-1) - UPC - AP - DD - PROCI.23/93 -  - 2023/98 - DIS