Abstract
In order to study the effect of sunlight on the composition and properties of dissolved organic matter and metal forms in natural waters, the process of photodegradation of organo-mineral complexes in field conditions with samples of soil and swamp waters was studied. Total content of certain aliphatic and aromatic carboxylic acids increased in the studied samples after irradiation. Photodegradation of organic matter of the natural waters that are rich in iron is accompanied by formation of colloidal particles (Fe hydroxides). The amount of negatively-charged complexes of Ni, Cu, Zn and Cd increases during the insolation in swamp waters and decreases in soil waters.
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