Dissolved organic matter (DOM) is a complex mixture of organic compounds that are dissolved in water, typically found in natural aquatic environments such as rivers, lakes, and oceans. These organic compounds are derived from sources such as decaying plant and animal matter, as well as microbial activity. DOM plays a crucial role in various biogeochemical processes, such as nutrient cycling, carbon cycling, and the transport of pollutants. Researchers study DOM to better understand its composition, sources, transformation pathways, and ecological significance in aquatic ecosystems. DOM can also have significant implications for water quality, including affecting the color, odor, and taste of water.