Removal of arsenic(III) and arsenic(V) from sulfuric acid solution by liquid-liquid extraction

2003 ◽  
Vol 78 (6) ◽  
pp. 659-665 ◽  
Author(s):  
Lucyna Iberhan ◽  
Maciej Wi?niewski
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Removal Of Arsenic

scholarly journals Solvent extraction of Sc(III) from sulfuric acid solution by bis(2-ethylhexyl) phosphonic acid in toluene

2002 ◽  
Vol 67 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Devendra Koladkar ◽  
Purshottam Dhadke
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Equilibrium Constants ◽  
Phosphinic Acid ◽  
Extraction Equilibrium ◽  
H2so4 Concentration ◽  
Liquid Liquid Extraction ◽  
Extraction Reaction ◽  
Reaction Proceeds

Liquid-liquid extraction of scandium(III) from sulfuric acid solution using bis(2-ethylhexyl) phosphinic acid (PIA-8) in toluene has been studied. The extraction of scandium(III) was found to be quantitative with 0.03 M PIA-8 in toluene in the acidic range of 0.1?0.5 M and 6.0?8.0 M H2SO4. The effect of the reagent concentration and other parameters on the extraction of scandium(III) was also studied. The stoichiometry of the extracted species of scandium(III) was determined on the basis of the slope analysis method. The extraction reaction proceeds via the cation exchange mechanism in the H2SO4 concentration range of 0.1?0.5M and the extracted species is ScR3.3HR. However, at higher acidity (6.0M?8.0M H2SO4) it proceeds by solvation. The extracted species is HSc(SO4)2.4HR. The temperature dependencies of the extraction equilibrium constants were examined to estimate the apparent thermodynamic functions (?H, ?S and ?G) for the extraction reaction.

scholarly journals Effect of Jarosite on the Removal of Arsenic ions in Sulfuric Acid Solution

2005 ◽  
Vol 121 (12) ◽  
pp. 597-602 ◽  
Author(s):  
Yuichi TOMIOKA ◽  
Naoki HIROYOSHI ◽  
Yasumasa KUBO ◽  
Masami TSUNEKAWA
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Removal Of Arsenic

scholarly journals Continuos Operation of Chromium (VI) Recovery from Sulfuric Acid Solution by Liquid Surfactant Membrane.

1991 ◽  
Vol 17 (6) ◽  
pp. 1104-1109 ◽  
Author(s):  
Yasushige Mori ◽  
Shingo Hibin ◽  
Hideyuki Uemae ◽  
Masataka Tanigaki ◽  
Wataru Eguchi
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Chromium Vi
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