Open AccessAn X-ray photoelectron spectroscopy study of uranyl-chitosan interaction
Author(s) -
A. N. Veleshko,
I. E. Veleshko,
A. Yu. Teterin,
K. I. Maslakov,
L. Vukčević,
Yury A. Teterin,
К. Е. Иванов
Publication year - 2008
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp0802043v
Subject(s) - uranyl , x ray photoelectron spectroscopy , uranium , sorption , chitosan , chemistry , spectroscopy , nuclear chemistry , inorganic chemistry , materials science , adsorption , analytical chemistry (journal) , organic chemistry , chemical engineering , physics , quantum mechanics , engineering , metallurgy
An X-ray photoelectron spectroscopy study of uranium sorption by spherically-granulated chitosan in sulphate solutions, as well as the study of the nature of the U(VI) - chitosan interaction was carried out in this work. The X-ray photoelectron spectroscopy analysis showed that the uranyl - chitosan interaction results in the formation of complexes with aminogroup nitrogen, and possibly chitin ring oxygens and free hydroxyl groups in the equatorial plane. Under the UHV in the spectrometer chamber, the uranyl-amin and uranyl-hyroxide bonds were shown to break and tetravalent uranium compounds were shown to form on the sample surface. Hydroxyl groups were shown to evaporate. The calculated DG0 = -1,3 kJ/mol can be an evidence of several concurrent processes, some of which require energy, as well as of the formation of a surface chemical compound