Dissolution kinetics of soil clays in sulfuric acid solutions: Ionic strength and temperature effects

2014 ◽  
Vol 51 ◽  
pp. 170-183 ◽  
Author(s):  
Irshad Bibi ◽  
Balwant Singh ◽  
Ewen Silvester
Keyword(s):  
Sulfuric Acid ◽  
Ionic Strength ◽  
Temperature Effects ◽  
Dissolution Kinetics ◽  
Acid Solutions ◽  
Soil Clays ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of

scholarly journals Kinetic Model for Dissolution of Cement Copper in Sulfuric Acid Solutions Containing Cupric Ions

2021 ◽  
Vol 15 (3) ◽  
pp. 395-402
Author(s):  
Nizamettin Demirkıran ◽  
◽  
G. Deniz Turhan Özdemir ◽  
Keyword(s):  
Sulfuric Acid ◽  
Dissolution Rate ◽  
Copper Powder ◽  
Dissolution Kinetics ◽  
Reaction Model ◽  
Ion Concentration ◽  
Acid Solutions ◽  
Cupric Ion ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of

In this paper, the dissolution kinetics of cement copper powder in sulfuric acid solutions containing cupric ions was examined. It was observed that the dissolution rate of copper increased with increasing the acid concentration, temperature, and stirring speed. It was determined that the dissolution rate of copper enhanced with increasing the cupric ion concentration up to 0.025 M. It was found that the temperature and concentration of cupric ion had more considerable effects on the dissolution of copper powder. The kinetic analysis of the process was performed, and it was observed that it fits the first order pseudo-homogenous reaction model. The activation energy was calculated to be 31.1 kJ/mol.

Kinetics of reduction of U(VI) with zinc amalgam in sulfuric acid solutions

2015 ◽  
Vol 57 (1) ◽  
pp. 31-35 ◽  
Author(s):  
V. N. Momotov ◽  
E. A. Erin ◽  
V. M. Chistyakov
Keyword(s):  
Sulfuric Acid ◽  
Acid Solutions ◽  
Zinc Amalgam ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Kinetics of Molybdenum(VI) Oxide Dissolution in Sulfuric Acid Solutions

2004 ◽  
Vol 38 (3) ◽  
pp. 316-321 ◽  
Author(s):  
E. Yu. Nevskaya ◽  
I. G. Gorichev ◽  
A. D. Izotov ◽  
B. E. Zaitsev ◽  
K. M. Al'dieva ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Solutions ◽  
Oxide Dissolution ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of

Kinetics of scandium sorption from sulfuric acid solutions by ampholyte Lewatit TP260

2020 ◽  
Author(s):  
V. N. Rychkov ◽  
K. A. Nalivayko ◽  
S. M. Titova ◽  
E. V. Abakumova ◽  
O. V. Yakovleva ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Solutions ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of

scholarly journals Kinetics of Dissolution of Copper-Zinc Alloy in Nitric-Sulfuric Acid Solutions

2019 ◽  
pp. 214-221
Author(s):  
Natalya М. Vostrikova ◽  
Elena D. Kravtsova
Keyword(s):  
Sulfuric Acid ◽  
Noble Metals ◽  
Chemical Processes ◽  
Zinc Alloy ◽  
Acid Solutions ◽  
Copper Zinc ◽  
Kinetics Of Dissolution ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of ◽  
Base Substrate

Studies were carried out on the dissolution of a copper-zinc alloy imitating a base substrate of an electron scrap containing noble metals in nitric-sulfuric acid solutions. A mathematical model is obtained that allows calculating the rate of copper and zinc transition to nitric-sulfuric solutions by varying the concentration of H+ ions from 1 to 4 g-ion / dm3 and NO3 – ions from 0,5 to 1,0 g-ion / dm3. In the range of concentrations of H+ and NO3 – ions studied, the maximum rate of copper transition into the solution is 6,5·10–5, and zinc is 4,5·10–5 kg / m2s. The equation of regression allowing to carry out a choice of conditions for proceeding with necessary speed of the chemical processes taking place in metallurgical practice is presented

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