Speaker
Prof.
Pavol Rajec
(Faculty of Natural Science, Comeniues University, Bratislava)
Description
Activated carbon can potentially be used as an adsorbent for removing Tc from aqueous solutions. We have prepared and tested five carbon materials for their capabilities for sorption of pertechnetate (TcO4−). A carbon materials were prepared by soaking of fibrous cellulose with different solutions containing inorganic materials suitable for creation of micropores and after drying, material was carbonized at 500-800 oC. Prepared carbon materials were characterized by BET, acid-base titration, XRD and TEM methods.
Sorption of TcO4− on carbon sorbents is fast. For some sorbents even 1 minute is enough to reach more than 99% sorption. Sorption of TcO4− is pH dependant. Maximum Kd was in acidic pH (pH 2-3) and reach about 7x104. Kd were decreasing with increasing pH. In sample B sorption of TcO4− was high even at pH 8 (Kd 5x103).
Primary author
Prof.
Pavol Rajec
(Faculty of Natural Science, Comeniues University, Bratislava)
Co-authors
Dr
Ivan Berek
(Polymer Institute, Slovak Academy of Science, Bratislava)
Dr
Ivan Novák
(Polymer Institute, Slovak Academy of Science, Bratislava)
Mr
Martin Daňo
(Faculty of Natural Science, Comenius University, Bratislava)
Dr
Michal Galamboš
(Faculty of Natural Science, Comeniues University, Bratislava)
Mr
Michal Horňáček
(Faculty of Chemical and Food Technology STU, Bratislava)
Dr
Mária Čaplovičová
(Faculty of Natural Science, Comenius University, Bratislava)
Dr
Oľga Rosskopfová
(Faculty of Natural Science, Comenius University, Bratislava)
Dr
Pavol Hudec
(Faculty of Chemical and Food Technology STU, Bratislava)
Dr
Ĺubomír Čaplovič
(Faculty of Materials Science and Technology, Trnava)
