The Recovery of Iron from Zinc Sulphate-Sulphuric Acid Processing Solutions by Solvent Extraction or Ion Exchange

1998 ◽  
Vol 18 (2) ◽  
pp. 105-145 ◽  
Author(s):  
P. A. RIVEROS ◽  
J. E. DUTRIZAC ◽  
E. BENGUEREL ◽  
G. HOULACHI
Keyword(s):  
Solvent Extraction ◽  
Ion Exchange ◽  
Sulphuric Acid ◽  
Zinc Sulphate ◽  
Acid Processing

Application of Ion Exchange, Solvent Extraction, and Ion-Imprinted Methods for Separation of 203Pb

2019 ◽  
Vol 61 (6) ◽  
pp. 724-727
Author(s):  
M. Yarmohammadi ◽  
M. Mirzaei ◽  
A. Samadi-Maybodi
Keyword(s):  
Solvent Extraction ◽  
Ion Exchange ◽  
Ion Imprinted

scholarly journals Separation of Ag(I) by Ion Exchange and Cementation from a Raffinate Containing Ag(I), Ni(II) and Zn(II) and Traces of Cu(II) and Sn(II)

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 112 ◽  
Author(s):  
Wei Xing ◽  
Man Lee ◽  
Seung Choi
Keyword(s):  
Ascorbic Acid ◽  
Nitric Acid ◽  
Solvent Extraction ◽  
Ion Exchange ◽  
Anode Slime ◽  
Silver Particles ◽  
Copper Sheet ◽  
Agno3 Solution ◽  
Micron Size ◽  
Leaching Solution

Ion exchange and cementation experiments were done to separate silver(I) from a raffinate containing silver(I), nickel(II), and zinc(II) and small amounts of copper(II) and tin(II). The raffinate resulted from the recovery of gold(III), tin(II) and copper(II) by solvent extraction from a leaching solution of anode slime. Ion exchange with anionic resins was not effective in separating silver(I) because tin(II) and zinc(II) were selectively adsorbed into the anionic resins. It was possible to separate silver(I) by cementation with copper sheet. Treatment of the cemented silver with nitric acid solution increased the purity of silver(I) in the solution from 50.9% to 99.99%. Adjusting the pH of the AgNO3 solution to higher than 6, followed by adding ascorbic acid as a reducing agent, led to the synthesis of silver particles with micron size.

scholarly journals Movement of zinc sulphate in a calcium-saturated soil: cation exchange and precipitation of gypsum.

1987 ◽  
Vol 35 (3) ◽  
pp. 295-313
Author(s):  
K. Harmsen
Keyword(s):  
Ion Exchange ◽  
Transition Zone ◽  
Zinc Sulphate ◽  
Solubility Product ◽  
Mass Conservation ◽  
Saturated Soil ◽  
Adsorption Complex ◽  
Dimensional Model ◽  
One Dimensional ◽  
Leaching Solution

A one-dimensional model for the movement of zinc sulphate through calcium-saturated soil is presented. Processes considered include mass flow, ion exchange, precipitation and dissolution. Precipitation occurs when the solubility product of gypsum is exceeded. In the presence of gypsum, ion exchange takes place at two separate interfaces, which move with different velocities through the soil. At the first interface precipitation of gypsum takes place in conjunction with ion exchange, and at the second interface the gypsum dissolves again and ion exchange proceeds until equilibrium is reached with the leaching solution. The composition of the transition zone between the two interfaces is calculated from the conditions of mass conservation and electroneutrality, the solubility product of gypsum and assuming a linear ion exchange equation. It is shown that the concentration of sulphate in the transition zone is higher than in the leaching solution, due to dissolution of gypsum at the second interface. In the presence of gypsum, zinc penetrates deeper into the soil than in its absence, but the fraction of the adsorption complex saturated with zinc is smaller. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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