Incorporation of mineral phosphorus and potassium on leather waste (collagen): a new N(collagen)PK-fertilizer with slow liberation.

Autor: Nogueira FG; Departamento de Química, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-000, Lavras-MG, Brazil., do Prado NT, Oliveira LC, Bastos AR, Lopes JH, de Carvalho JG
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2010 Apr 15; Vol. 176 (1-3), pp. 374-80. Date of Electronic Publication: 2009 Nov 13.
DOI: 10.1016/j.jhazmat.2009.11.040
Abstrakt: The feasibility of using a solid waste (rich in nitrogen) from the leather industry, after chromium extraction, as adsorbent for P and K, for possible utilization as NPK fertilizer was evaluated. The materials, with and without the addition of P and K, were characterized by chemical analyses, infrared spectroscopy, EDS (energy dispersive X-ray spectrometry) and SEM (scanning electronic microscopy). Langmuir and Freundlich equations were used for analyzing the experimental data, which showed a better fit to the Freundlich model, thus suggesting a multilayer adsorption process on the surface of the adsorbent. A preliminary test in greenhouse demonstrates that the P and K incorporation on the matrix rich in nitrogen (collagen) is a interesting alternative to use such material as NPK fertilizer. The application of N(collagen)PK formulations, as a source of nutrients for the growth of rice plants, showed promising agronomic results.
(2009 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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