Portal de Periódicos da CAPES

Measurement of the Molecular Size of a Soum Humate Fraction

1969; International Centre for Diffraction Data; Volume: 13; Linguagem: Inglês

10.1154/s0376030800011605

2631-3626

Robert L. Wershaw, Samuel J. Heller, D.J. Pinckney,

Diatoms and Algae Research

Many of the chemical and physical interactions that take place in natural soil-water systems are strongly influenced by the presence of natural organic polyelectrolytes. The most common of these organic polyelectrolytes is humic acid, which is defined as the alkali soluble, acid insoluble fraction of soil organic matter. Over a hundred years of experimental data have demonstrated that a wide variety of different materials having different physical and chemical properties fit this definition. If we are to make any progress in understanding the role of humic materials in soil-water systems, then we must have a classification system which, as far as possible, provides a unique taxonomic definition for each separate molecular species that falls into the category of humic acid.