• Aqueous photocatalytic oxidation of lignin and humic substances with supported TiO2Portjanskaja, Elina; Preis, Sergei; Kallas, Juha6th European Meeting Environmental Chemistry : December 6-10, 2005, Belgrade, Serbia and Montenegro2005 / p. 145
  • The influence of iron ions on the efficiency of aqueous photocatalytic oxidation of organic pollutantsKlauson, Deniss; Portjanskaja, Elina; KritÅ¡evskaja, Marina; KatÅ¡ina, Anna; Preis, Sergei; Kallas, Juha6th European Meeting Environmental Chemistry : December 6-10, 2005, Belgrade, Serbia and Montenegro2005 / p. 230