High-rate precipitation of iron as jarosite by using a combination process of electrolytic reduction and biological oxidation

Effect of neutralized solid waste generated in lime neutralization on the ferrous ion bio-oxidation process during acid mine drainage treatment

“…"Seeding" is the most desirable means by which to promote jarosite formation [26,27]. Dutrizac [26] found that during the jarosite chemical synthesis process, the jarosite precipitation rate seems to increase in a linear manner with the amount of jarosite seed present.…”

“…Dutrizac [26] found that during the jarosite chemical synthesis process, the jarosite precipitation rate seems to increase in a linear manner with the amount of jarosite seed present. Song et al [27] demonstrated that the extra jarosite seed addition can enhance jarosite precipitation efficiency during bio-oxidation of ferrous ions by A. ferrooxidans. Other crystalline minerals, such as silica sand, also could play the role of seed during the jarosite bio-synthesis process [28].…”

Red Mud as an Additional Source of Titanium Raw Materials

“…The Fe (III) containing in the filtrate can be effectively precipitated with the jarosite process [10,11] or the hydrothermal hematite precipitation process. Thus the regenerated sulfuric acid can be reused for leaching of new portions of the solid residue.…”

Influence of Monovalent Cations on the Efficiency of Ferrous Ion Oxidation, Total Iron Precipitation, and Adsorptive Removal of Cr(VI) and As(III) in Simulated Acid Mine Drainage with Inoculation of Acidithiobacillus ferrooxidans

“…This process has been reported to raise the pH level and remove Fe and SO 4 2− ions from the AMD system through the formation of Fe(OH) 3 , Fe(OH) 2 , and CaSO 4 . However, this method has serious disadvantages with respect to the higher operating costs and difficulty of dewatering the waste residue [9][10][11]. Therefore, it is of great significance to develop an environmentally-friendly and efficient way to remove Fe ions and toxic elements present in the AMD.…”

“…Metals 2018, 8, 0596 9 of 11 We speculate that the large differences in the specific surface areas of the three schwertmannites were related to the concentration of H + released during the formation of schwertmannite. According to the synthesis reaction of schwertmannite [Reaction (2)], the higher mineralization degree of Fe 3+ in the solution would induce a higher release of H + , thereby leading to a gradual diffusion and dissolution of the previously synthesized minerals [17,46].…”