⁹⁰Sr adsorption from the aquatic environment of Chornobyl exclusion zone by chemically enhanced TiO₂

This paper describes the testing of titanium dioxide, chemically modified by arsenate groups, as an adsorbent of ⁹⁰Sr from the component of aquatic ecosystems of the Chornobyl exclusion zone. It is shown, that the chemical composition of the aquatic environment impacts ⁹⁰Sr adsorption. The 4As-TiO₂ adsorbent reduces the activity of some samples by almost 100 %, which indicates selectivity and high adsorption capacity of the adsorbent in relation to ⁹⁰Sr. In some experiments, this value reached 100 %, and the activity was reduced to the level of the maximum permissible ⁹⁰Sr concentration. (author)