Some definitions in environmental geochemistry
Water geochemistry modeling - Environmental concepts and applications

At several points in the document, reference is made to terms specific to geochemistry applied to environmental problems. The purpose of this glossary is to provide a brief definition of these terms.

Fulvic and humic acids: organic macromolecules derived from the degradation of biomolecules of living organisms, present in soils and waters, rich in functional groups such as $—\mathrm{OH}$ , $—\mathrm{COOH}$ . Humic acids are less soluble than fulvic acids, and precipitate at $\mathrm{pH}\le$