title: The influence of ferrous/ferric ions on the efficiency of photocatalytic oxidation of pollutants in groundwater.
abstract: The complex influence of ferrous/ferric ions on the efficiency of aqueous photocatalytic oxidation (PCO) of 2-ethoxyethanol (2-EE), methyl tert-butyl ether (MTBE) and humic substances (HS) was established. A drastic efficiency increase at lower concentration of ferrous/ferric ions was observed to change to a sharp decrease at higher concentrations for 2-EE and MTBE, whereas for HS only an inhibitive effect of Fe2+/3+ on the PCO efficiency was noticed. The authors proposed an explanation for the observed phenomena based on the different sensitivities of pollutants towards radical-oxidation reactions and the competitive adsorption of metallic ions and pollutants on the TiO2 surface.
authors: Department of Chemical Engineering, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia.
authors: D
authors: D
authors: Klauson
authors: S
authors: S
authors: Preis
authors: E
authors: E
authors: Portjanskaja
authors: A
authors: A
authors: Kachina
authors: M
authors: M
authors: Krichevskaya
authors: J
authors: J
authors: Kallas
mesh_terms: D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D007477:Ions; D010084:Oxidation-Reduction; D010777:Photochemistry; D014874:Water Pollutants, Chemical
chemical_list: D005290:Ferric Compounds; D005296:Ferrous Compounds; D007477:Ions; D014874:Water Pollutants, Chemical