Novotny, EH,Auccaise, R,Velloso, MHR,Correa, JC,Higarashi, MM,Abreu, VMN,Rocha, JD,Kwapinski, W

2012

January

Pesquisa Agropecuaria Brasileira

Characterization of phosphate structures in biochar from swine bones

Published

()

bone phosphate phosphate availability principal component analysis pyrolysis multivariedade curve resolution analysis soil fertility NUCLEAR-MAGNETIC-RESONANCE NMR CROSS-POLARIZATION CALCIUM PHOSPHATES P-31 SPECTROSCOPY IDENTIFICATION SORPTION PHASES IONS

47

672

676

The objective of this work was to develop an alternative methodology to study and characterize the phosphate crystalline properties, directly associated with solubility and plant availability, in biochar from swine bones. Some phosphate symmetry properties of pyrolyzed swine bones were established, using solid state nuclear magnetic resonance spectroscopy, principal component analysis, and multivariate curve resolution analysis, on four pyrolyzed samples at different carbonization intensities. Increasing carbonization parameters (temperature or residence time) generates diverse phosphate structures, increasing their symmetry and decreasing the crossed polarizability of the pair H-1-P-31, producing phosphates with, probably, lower solubility than the ones produced at lower carbonization intensity. Additionally, a new methodology is being developed to study and characterize phosphate crystalline properties directly associated with phosphate solubility and availability to plants.

10.1590/S0100-204X2012000500006