Humic substances

{
  "id": "MLC-T-CHM-005427",
  "term": "Humic substances",
  "field": "Chemistry",
  "definition": "Complex, heterogeneous organic compounds formed from the decomposition of plant and animal matter in soils, sediments, and natural waters. These substances are resistant to further microbial degradation and contribute significantly to the organic carbon content of ecosystems. They are broadly categorized into humic acids, fulvic acids, and humin based on their solubility at different pH levels.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "dissolved organic carbon",
    "fulvic acid",
    "soil"
  ],
  "references": [
    "PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 897 (https://doi.org/10.1351/PAC-REC-08-07-09)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/humic-substances/"
}