Hydrolytic Behavior of Th4+, UO22+, and Ce3+ Ions at Various Temperatures
Makaleler > Tam Makale · 2009
Yazarlar: Serap TEKSÖZ, Çiğdem İÇHEDEF, Perihan Uenak
Journal of Chemical & Engineering Data, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2009, cilt 54, ss 1183-1188
DOI: 10.1021/je800601m
Özet
The hydrolytic behavior of Th 4+, UO 2 2+, and Ce 3+ was investigated using the potentiometric method at elevated temperatures in KCl medium. For each metal ion, stability constants were obtained from the pH-metric data using the program HYPERQUAD2006. The formation of [Th(OH)] 3+, [Th(OH) 2 ] 2+, [Th(OH) 3 ] +, Th(OH) 4, [Th 4 (OH) 8 ] 8+, and [Th 6 (OH) 15 ] 9+ for the thorium ion, [UO 2 (OH)] +, [(UO 2 ) 2 (OH) 2 ] 2+, [(UO 2 ) 3 (OH) 4 ] 2+, and [(UO 2 ) 3 (OH) 5 ] + for the uranyl ion, and [Ce 2 (OH)] 5+, [Ce 2 (OH) 2 ] 4+, Ce(OH) 3, and [Ce 2 (OH) 5 ] + for the cerium ion was taken into consideration. In addition, the effect of temperature on the stability constants was studied, and thermodynamic parameters were derived and discussed.