Data/hora: 10/06/2024 09:08:05

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 23/06/2021
Data da última atualização: | 10/06/2022
Autoria: | LODI, L. A.; KLAIC, R.; RIBEIRO, C.; FARINAS, C. S.
Afiliação: | CAUE RIBEIRO DE OLIVEIRA, CNPDIA; CRISTIANE SANCHEZ FARINAS, CNPDIA.
Título: | A green K-fertilizer using mechanical activation to improve the solubilization of a low-reactivity potassium mineral by Aspergillus niger.
Ano de publicação: | 2021
Fonte/Imprenta: | Bioresource Technology Reports, v. 15, e100711, 2021.
Páginas: | 1-8
ISSN: | 2589-014X
DOI: | https://doi.org/10.1016/j.biteb.2021.100711
Idioma: | Inglês
Conteúdo: | Here, we investigated process engineering strategies to improve the biological solubilization of K-feldspar, a lowreactivity potassium mineral, aiming to obtain a green K-fertilizer for agricultural applications. The results using submerged cultivation of Aspergillus niger showed that the biological K-solubilization of pristine K-feldspar rock released up to 15.87% (reaching 220 mg L− 1 after 3 days) when using 5% glucose as carbon source and initial pH 4, without a preculture step. Besides medium acidification, the microorganism-mineral physical interaction played a key role in promoting K-solubilization. Furthermore, prior mechanical activation of the K-feldspar led to substantial increases of up to 172% in K release (reaching 326.86 mg L− 1 ), compared to the original mineral, and reduced the K-solubilization cultivation time to only 24 h. The results demonstrated the potential of integrating mechanical activation with biological solubilization to advance on the use of low-solubility potassium minerals as K-fertilizers, thus contributing to a more sustainable agriculture.
Palavras-Chave: | Biological solubilization; Igneous rock; Mechanical activation; Potassium rock; Submerged cultivation.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (17804-1) - UPC - AP - DD - PROCI.21/60 -  - 2021/60 - DIS