Complexes of vanadyl and uranyl ions with the chelating groups of humic matter

Equilibrium Studies on Chromium(III) Complexes of Salicylic Acid and Salicylic Acid Derivatives in Aqueous Solution

“…This might be due to the higher affinity of Cr(III) ion for carboxylate groups in acidic medium. The same behaviour was observed in SA complexes of uranyl (UO 2ϩ ) 29) and Al(III) complexes of 2,x-DHBA. 9) However, the prevelance of one of the two possibilities in SA and its derivatives towards Cr(III) ion depends on the pH of the solution and the charge/radius ratio of the metal ion.…”

Evaluation of the complexation behavior between humic acid and UO22+with fluorescence spectroscopy and its mixture analysis

“…This value of log K app in pH = 4.00 is compatible with that of the literature [24]. Since only carboxylic groups must take part in the complex formation at this pH [30], the value of the obtained C L might be reasonable, considering that the total concentration of this group is 3.00 × 10 −4 M. As a consequence, the combination of the SIMPLISMA and the MSRW model can be effectively applied to the complexation process of a simple organic compound such as salicylic acid with UO 2 2+ . In the next section, the HA/UO 2 2+ system is analyzed using above method.…”

A Comparative Study of Europium, Thorium and Uranium Binding to an Aquatic Fulvic Acid

“…All experiments were performed at a constant ionic strength of 0. 10 (Table I) [7,8]. The total concentration of the fulvic acid was for Th4 and UO 2 2 ' 60 mg/l and for Eu+ 120 mg/l.…”