Humic substances represent the major part of organic matter in soil, peat, coal, and sediments, and are important components of dissolved natural organic matter (NOM) in lakes (especially dystrophic lakes), rivers, and sea water. Humic substances account for 50 – 90% of cation exchange capacity in soils.

Based on chemical and spectral studies of oceanic and coastal humus we recently proposed a class structure and a mechanism by which these marine humic substances could form2.

Sea display bulk characteristics which differ from those of humics from coastal waters and especially from those of humic substances isolated from soils and marine sediments.

2021年4月1日 · In this review, we collate and summarize the applications and working principles of such HSs in agriculture and environmental ecology, mainly to elaborate the multiple roles of this functional polymer along with physical chemical quantification.

There are three classes of aquatic humus (fulvic acids, humic acids, and humin), all of which share the characteristics of being heterogeneous biomolecules which are yellow to brown or black in color, high to moderate molecular weight, and biologically recalcitrant.

1998年1月1日 · There are three classes of aquatic humus (fulvic acids, humic acids, and humin), all of which share the characteristics of being heterogeneous biomolecules which are yellow to brown or black in color, high to moderate molecular weight, and biologically recalcitrant.

Humus is defined as a complex polymer with polyphenol and quinone as aromatic core, containing functional groups like carboxyl, phenolic, and sugar fragments. It exhibits colloidal properties and its structure can adjust in response to changes in pH and concentration.

2021年5月20日 · Humic substances are the main constituents of natural organic matter, found in both aquatic and terrestrial environments. Humic substances are a complex, dispersed, and heterogeneous mixture of various organic compounds synthesized from organic matter residues, decomposed by microorganisms.

2023年2月1日 · Humic-like substances (HULIS) are organic macromolecular compounds (water-soluble brown carbon) that have an important effect on climate change due to their strong light absorption. However, the molecular composition of HULIS in atmospheric particles in the offshore Eastern China Sea (OECS) has scarcely been investigated.

2007年10月1日 · In aquatic ecosystems, humic substances exhibit an important influence on the properties and functions of natural water systems as they play a direct role in the formation of physical and chemical...