2022

Vähätalo, Anssi V.; Carena, Luca; Vione, Davide

This photochemistry article introduces the mechanistic principles of photochemical reactions and their importance for the transformation of natural and anthropogenic compounds in surface waters. When chromophores absorb solar radiation, the subsequent photochemical reactions can transform compounds directly or produce reactive intermediates, such as reactive oxygen species, which mediate chemical transformations. Photochemical reactions typically break down organic matter and pollutants into biologically labile forms and can cause complete mineralization of organic matter. Photochemical reactions are a major component in the carbon cycling and self-depollution of inland waters.