Study on the kinetics of iron oxide leaching by oxalic acid

Model for Predictive Analysis of Heat Absorbed by Oxalic Acid Solution Relative to the Solution Temperature during Leaching of Iron Oxide Ore

“…Many researchers have studied the use of oxalic acid to dissolve iron oxide on a laboratory scale [7][8][9][10][11][12][13]. Lee et al [14] used 0.19-0.48M oxalic acid to dissolve hydrated iron oxide. Iron dissolution was found [14] to reach 90% for a 20% slurry within 60mins.…”

“…Lee et al [14] used 0.19-0.48M oxalic acid to dissolve hydrated iron oxide. Iron dissolution was found [14] to reach 90% for a 20% slurry within 60mins. using 0.19M oxalic for the finer fraction (< 150μm) containing 0.56% Fe 2 O 3 .The coarser fraction (>150μm) containing 1.06% Fe 2 O 3 achieved a lower iron removal, reaching a steady state of only 78% after 1 h of leaching.…”

Open System Analysis of Bioextracted Iron during Leaching of Iron Oxide Ore using Acidithiobacillus Ferrooxidans

“…The dissolution of iron oxides in oxalic acid was found to be very slow at temperatures within the range 25-60oC, but its rate increases rapidly above 90oC [2]. The dissolution rate also increases with increasing oxalate concentration at the constant pH values set within the optimum range of pH 2.5-3.0.…”

Thermodynamic analysis of stability in iron removal from kaolin by using oxalic acid

“…Other authors reported experimental studies on iron removal which employs organic acids as oxalic acid and ascorbic [5,6]. However it is considered that the oxalic acid presents a greater potential for removal of iron species, given their complexing behavior and their selectivity [7].…”