scholarly journals Complex Formation between the Uranyl Ion and Citric Acid

1975 ◽  
Vol 48 (1) ◽  
pp. 227-229 ◽  
Author(s):  
Emiko Ohyoshi ◽  
Junko Oda ◽  
Akira Ohyoshi
Keyword(s):  
Citric Acid ◽  
Complex Formation ◽  
Uranyl Ion

ChemInform Abstract: COMPLEX FORMATION BETWEEN THE URANYL ION AND CITRIC ACID

1975 ◽  
Vol 6 (15) ◽  
pp. no-no
Author(s):  
EMIKO OHYOSHI ◽  
JUNKO ODA ◽  
AKIRA OHYOSHI
Keyword(s):  
Citric Acid ◽  
Complex Formation ◽  
Uranyl Ion

Carboxyl groups of citric acid in the process of complex formation with bivalent and trivalent metal ions in biological systems

2018 ◽  
Vol 182 ◽  
pp. 37-47 ◽  
Author(s):  
Michał Zabiszak ◽  
Martyna Nowak ◽  
Katarzyna Taras-Goslinska ◽  
Małgorzata T. Kaczmarek ◽  
Zbigniew Hnatejko ◽  
...  
Keyword(s):  
Citric Acid ◽  
Complex Formation ◽  
Metal Ions ◽  
Biological Systems ◽  
Carboxyl Groups ◽  
Trivalent Metal ◽  
Trivalent Metal Ions

scholarly journals Leaching of Fluoride from Biotite Mica in Soil: Implications for Fluoride in Shallow Groundwater

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
K. U. K. S. Kularatne ◽  
H. M. T. G. A. Pitawala
Keyword(s):  
Citric Acid ◽  
Complex Formation ◽  
Organic Acids ◽  
Shallow Groundwater ◽  
Ionic Exchange ◽  
Strong Positive Correlation ◽  
High Concentration ◽  
Short Term ◽  
Inorganic Acids ◽  
High Concentrations

Leaching of from biotite was investigated at room temperature by performing a series of short-term leach tests. The leaching of from biotite structure strongly depends on its weathering stage. Results of this study suggest that high concentration of is leached from highly weathered biotite, compared to fresh biotite. Results of dissolution experiments confirm that the organic acids in soil promote the leaching of from biotite compared to inorganic acids. Citric acid which is a week organic acid enhances leaching of from biotite structure compared to strong inorganic acid HNO3, independent of the weathering stage of biotite. Strong positive correlation between K+ and Fe2+ with in biotite treated with citric acid suggests that readily leachs into the solution through an ionic exchange and complex formation. Organic acids involve sorption and complex formation processes leading to release of into the solution. Our studies suggest that in the presence of organic acids is leached readily into water percolating through the soil. Therefore, shallow groundwater replenished by the water table may achieve high concentrations by this leaching process.

scholarly journals Electron Donor-Acceptor Interaction of 8-Hydroxyquinoline with Citric Acid in Different Solvents: Spectroscopic Studies

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Demelash Jado ◽  
Khalid Siraj ◽  
Nathan Meka
Keyword(s):  
Charge Transfer ◽  
Citric Acid ◽  
Complex Formation ◽  
Electron Donor ◽  
Formation Constant ◽  
Charge Transfer Complex ◽  
Standard Free Energy ◽  
Physical Parameters ◽  
Stoichiometric Ratio ◽  
Standard Free Energy Change

Charge transfer complex formation between 8-hydroxyquinoline as the electron donor and citric acid as the electron acceptor has been studied spectrophotometrically in ethanol and methanol solvents at room temperature. Absorption band due to charge transfer complex formation was observed near 320 and 325 nm in ethanol and methanol, respectively. The stoichiometric ratio of the complex has been found 3 : 1 by using Job’s and conductometric titration methods. Benesi-Hildebrand equation has been applied to estimate the formation constant and molecular extinction coefficient. It was found that the value of formation constant was larger in ethanol than in methanol. The physical parameters, ionization potential, and standard free energy change of the formed complex were determined and evaluated in the ethanol and methanol solvents.

New Aspects of Complex Formation in the Gadolinium(III)–Citric Acid System in Aqueous Solution

2021 ◽  
pp. 1-36
Author(s):  
Valentina Yu. Ivanova ◽  
Igor D. Shurygin ◽  
Vladimir V. Chevela ◽  
Olga P. Ajsuvakova ◽  
Vyacheslav E. Semenov ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Complex Formation ◽  
Acid System
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