Impregnation of coal with chitosan has an ambiguous effect on its sorption efficiency depending on geochemical, textural and petrographical properties of individual coal type, and on competition of two opposite effects brought about by impregnation of coal with chitosan: reduction of leaching of
humic substances from coal by their interaction with chitosan, and reduction of the availability of functional groups of
humic substances for metal ion binding due to this interaction.
It is found that
humic substances can reduce the concentration of free metals ions in waters (Stackhouse andBenson, 1989).
It is a principal component of
humic substances which are the major organic constituents of soil, peat, and coal.
His topics include polymer behavior at clay and solid surfaces, uncharged (nonionic) polymers, positively charged polymers (polycations), some practical application of the clay-polymer interaction, polymer-clay nanocomposites, proteins and enzymes, viruses and bacteriophages, and
humic substances. He has updated the 1979 first edition to incorporate the substantial developments in clay science that partly result from the application of modern surface analytical, computational, and spectroscopic techniques.
Under fire is the belief that soil remains stubbornly soil, a large fraction of its organic materials resistant to decay because of the accumulation of large molecules called
humic substances. One professional society devoted to the substances is in the odd position of hearing colleagues label as fiction its primary topic of study.
[17] isolated
humic substances as the major organic substance of the sea mud from a tidal flat in Korea.
Removal or
humic substances by adsorbtion/ion exchange, Water Research 40: 173-176.
Several investigations have been carried out so far to conclusively show that
humic substances have significant effects on plant growth.
Las SH contenidas en el CBR se extrajeron con alcali siguiendo el protocolo descrito por Sharif (2002), se determino el porcentaje de carbono en el extracto humico total (EHT) y las fracciones de acidos humicos (AH) y acidos fulvicos (AF) siguiendo la metodologia descrita por la International
Humic Substances Society (IHSS, 2007).
The
humic substances were extracted according to procedures recommended by the International
Humic Substances Society and characterized by means of elemental analysis, thermogravimetry, and electron paramagnetic resonance (EPR).
The biochemical effect of peat is related to the content of
humic substances (HS) which participate in the peat healing effect (Klocking & Helbig 2005).
Lapez-Fando, "Changes in soil properties and
humic substances after long-term amendments with manure and crop residues in dryland farming systems," Journal of Plant Nutrition and Soil Science, vol.