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Characterization of humified compounds by extraction and fractionation on solid polyvinylpyrrolidone
Abstract New humification parameters are proposed for characterizing soils and organic fertilizers or amendments. They include an index, a degree and a rate of humification, all devised to assess theExpand
Determination of organic carbon in aqueous extracts of soils and fertilizers
Abstract A simple and accurate method for the routine determination of organic carbon in aqueous extracts of soils and fertilizers is described. Samples are oxidized for exactly 10 minutes with aExpand
Evaluation of heavy metals during stabilization of organic matter in compost produced with municipal solid wastes
The total content of six heavy metals (Cu, Zn, Pb, Cr, Ni and Cd), the Cd/Zn ratio and the zinc equivalent were determined for composts produced from municipal solid waste (MSW) both with and withoutExpand
Use of insoluble polyvinylpyrrolidone and isoelectric focusing in the study of humic substances in soils and organic wastes
Abstract The use of insoluble polyvinylpyrrolidone and isoelectric focusing in the study of humic substances is reviewed. Chromatography on insoluble polyvinylpyrrolidone is widely used toExpand
Changes in organic matter during stabilization of compost from municipal solid wastes
Stabilization of the organic matter contained in two static piles of compost derived from municipal solid wastes was followed for 55 days during both winter and summer. The degree of humification,Expand
INFLUENCE OF LONG‐TERM RESIDUE AND FERTILIZER APPLICATIONS ON SOIL HUMIC SUBSTANCES: A STUDY BY ELECTROFOCUSING
Soil samples were taken from the plots of an experimental field that had been treated continuously for 22 years with different residue and fertilizer applications (cereal residues, cattle manure,Expand
An enzymatic approach to the determination of the degree of stabilization of organic carbon in fertilizers
An enzymatic approach to assess the stability of organic matter extracted from organic fertilizers and amendments is proposed. The use of 0.1M NaOH plus 0.1M Na4P2O7 previously suggested as aExpand
Evolution of organic matter in sewage sludge: a study based on the use of humification parameters and analytical electrofocusing
Abstract The degree of humification (DH), humification index (HI), and humification rate (HR) were determined for seventeen samples of sewage sludges and composts from sewage sludges. The sameExpand
Investigation of fulvic acids from peat using capillary electrophoresis (CE)
The aim of this work was to characterize the fulvic acids (FA) extracted from peat by use of capillary electrophoresis (CE). Two FA extracts have been obtained using two different extractants (0.1 MExpand
Capillary electrophoresis of humic acid fractions
Abstract Capillary electrophoresis (CE) was used for the characterization of peat humic acid (HA) fractions of different molecular weight. The HA were precipitated from a 0.1M NaOH plus 0.1M Na4P2O7Expand
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