Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)–smectite under visible light

• Low-molecular-weight organic acids have significant influence on PAHs photolysis. • Chelating ability of LMWOAs with Fe are critical to their roles in Phe photolysis. • Presence of oxalic and malic acids favor Phe photodegradation on Fe(III)–clay. • EDTA or nitrilotriacetic acid inhibits both Fe(I...
Ausführliche Beschreibung

• Low-molecular-weight organic acids have significant influence on PAHs photolysis. • Chelating ability of LMWOAs with Fe are critical to their roles in Phe photolysis. • Presence of oxalic and malic acids favor Phe photodegradation on Fe(III)–clay. • EDTA or nitrilotriacetic acid inhibits both Fe(II) formation and Phe photolysis. • Reductive CO2 − radicals involved in Phe photodegradation are supported by EPR. Ausführliche Beschreibung