Building bridges between specialists on computational and empirical risk assessment of engineered nanomaterials

Adriana Zaleska (UG) in National Institute for Environmental Studies (NIES) in Tsukuba

prof. Zalewska - JapanBetween 15 and 29 of June I was visiting National Institute for Environmental Studies in Tsukuba (Japan) within Work Package 2: Carrying out experiments to produce necessary (missing) data for nanoparticles. Four series of TiO2 based nanoparticles was prepared by members of my research group and they will be systematically characterized to collect data regarding surface properties (including crystal structure, BET surface area, morphology and surface content) and toxicity. Based on obtained experimental data, computational model will be developed to evaluate environmental risk of TiO2-based nanoparticles.

TiO2 nanoparticles are the most researched photocatalytic material, because it provides the most efficient photocatalytic activity, the highest stability and the lowest cost. Pure and modified TiO2 is used both for degradation of organic and inorganic compounds in aqueous solutions and to remove microorganisms, e.g. in water and wastewater treatment and disinfection processes (Advanced Oxidation Technologies). Thus, TiO2 nanoparticles could be released to aqueous environment and affect organisms due to three potential mechanisms: (a) transport of nanoparticles via cell membrane; (b) release of metal ions from doped of modified TiO2 (noble and transient metals); or (c) formation of active oxygen species at irradiated TiO2 surface.

During my visit, procedure of toxicity measurements for TiO2-based nanocomposites was discussed and developed.


University of Gdansk
Faculty of Chemistry
ul. Wita Stwosza 63
80-952 Gdansk

European Commision