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... > Organic Chemicals > Hydrocarbons > Hydrocarbons, Cyclic > Hydrocarbons, Aromatic > Benzene Derivatives > Phenols > Humic Substances
Physical Phenomena > Geological Phenomena > Soil > Humic Substances
Biological Phenomena > Ecological and Environmental Phenomena > Environment > Soil > Humic Substances
Environment and Public Health > Environment > Soil > Humic Substances
Complex Mixtures > Soil > Humic Substances
Organic Chemicals > Carboxylic Acids > Humic Substances

Preferred term

Humic Substances  

Type

  • mesh:Descriptor

Definition

  • Organic matter in a state of advanced decay, after passing through the stages of COMPOST and PEAT and before becoming lignite (COAL). It is composed of a heterogenous mixture of compounds including phenolic radicals and acids that polymerize and are not easily separated nor analyzed. (E.A. Ghabbour & G. Davies, eds. Humic Substances, 2001). A complex mixture of dark colored hetero-polymeric phenolic compounds found in HUMUS; COAL; and PEAT; resulting from the decomposition of organic matter, particularly dead plants. They are soluble in alkali and carbonates, only slightly soluble at physiological pH, and can chelate metals.

Broader concept

Synonym(s)

  • 1415-93-6
  • Humic Substance

Allowable Qualifier(s)

Pharmacological Action(s)

In other languages

URI

http://data.loterre.fr/ark:/67375/JVR-XZBRTMP3-L

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