1. International Medical Physicochemical Centre and Institute of Technical Ecology, 25 Shevchenko Boulevard, 340017 Donetsk, Ukraine, Institute of Colloid Chemistry and Chemistry of Water, 42 Vernadsky Avenue, 252680 Kyiv (Kiev), Ukraine, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Max-Planck-Campus, D-14476 Golm, Germany