Data/hora: 22/09/2024 03:48:33

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