PHB and Montmorillonite Clay Composites as KNO3 and NPK Support for a Controlled Release

Autor(es)

Souza, Josiane Lima ^[1] ; de Campos, Adriana ^[1] ; Franca, Debora ^[1] ; Faez, Roselena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, UFSCar, Lab Polymer & Biosorbents Mat, Araras, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 27, n. 9, p. 2089-2097, SEP 2019.
• Citações Web of Science: 0

Resumo

In order to improve nutrient uptake by plants and at the same time decrease losses by leaching, polymeric compounds based on biodegradable poly(3-hydroxybutyrate) (PHB) and montmorillonite clay (MMt) were melt processed with KNO3 and NPK fertilizers (Fert). We present a comprehensive analysis of releasing profile of the potassium (K+), nitrogen (NH4+ and NO3-) and phosphorous (PO43-) from PHB/MMt/fertilizer at 90/0/10, 50/0/50, 80/10/10, 40/10/50, 25/25/50 formulation. The amount and type of the fertilizer and the presence of clay delineated the release of the cations and anions from the matrix. Cations released faster than anions through MMt composites due to cations-MMt interactions and its diffusion through MMt phase. The nutrients delivery from composites was lower than pure fertilizer. Composites formulations with smaller amount of PHB and MMt (25wt%) were enough to encapsulate the fertilizer and delay the ions releasing. Further, the simple method of preparation also attains the sustainability of the whole process. (AU)

• Processo FAPESP: 14/06566-9 - Híbridos poliméricos para liberação de nutrientes: preparação, caracterização e avaliação in situ no solo
• Beneficiário: Roselena Faez
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular