Environmental photochemical behaviors of iron minerals and oxalate and reactive oxygen species generation:A review
Oxalic acid or oxalate(Ox)and iron minerals coexist in the natural environment.The interaction and photochemical behavior between Ox and iron minerals strongly affect the process of molecular oxygen activation.Molecular oxygen activation affects the migration and transformation of pollutants in the coexisting system,which is the key to the development of green pollution control oxidation technology.Therefore,exploring the interaction between Ox and iron minerals and subsequent photochemical activation of molecular oxygen is one of the current research hotspots.This review systematically summarizes the recent research on the interaction between Ox and iron minerals,the adsorption behaviors of Ox on the surface of iron minerals and its conversion features,Fe(Ⅲ)-oxalate complex photolysis,and reactive oxygen species(ROS)generation.Moreover,the influence of the above process on the degradation of pollutants is also discussed.This review can deepen the understanding of the photochemical transformation of organic contaminants with the activation of molecular oxygen by iron minerals,and put forward the prospect of future research development direction.Furthermore,this review may provide a basis for the development of in situ environmental remediation technologies using natural iron minerals and organic matter.
oxalateiron mineralphotoactivation of molecular oxygenphotodegradationFe-oxalate complex
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