OOIR: Observatory of International Research

Papers

(The H4-Index of Hydrometallurgy is 31. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-11-01 to 2024-11-01.)

Article	Citations
Removal of iron, aluminium, manganese and copper from leach solutions of lithium-ion battery waste using ion exchange	77
A review of hydrometallurgy techniques for the removal of impurities from metallurgical-grade silicon	75
Recovery of scattered and precious metals from copper anode slime by hydrometallurgy: A review	68
A review on extractive metallurgy of tantalum and niobium	67
Leaching of cathode materials from spent lithium-ion batteries by using a mixture of ascorbic acid and HNO3	60
Recovery of rare earth elements from waste streams using membrane processes: An overview	60
The recent progress of ion exchange for the separation of rare earths from secondary resources – A review	58
Recovery of lithium from salt lake brine using a mixed ternary solvent extraction system consisting of TBP, FeCl3 and P507	58
Separation of cobalt and lithium from spent lithium-ion battery leach liquors by ionic liquid extraction using Cyphos IL-101	58
Processing of lithium ores: Industrial technologies and case studies – A review	55
Bioleaching of cobalt from Cu/Co-rich sulfidic mine tailings from the polymetallic Rammelsberg mine, Germany	54
A review of the recovery of precious metals using ionic liquid extractants in hydrometallurgical processes	53
Recovery of gallium from leach solutions of zinc refinery residues by stepwise solvent extraction with N235 and Cyanex 272	52
Novel bioleaching of waste lithium ion batteries by mixed moderate thermophilic microorganisms, using iron scrap as energy source and reducing agent	49
Separation of cobalt, nickel, and manganese in leach solutions of waste lithium-ion batteries using Dowex M4195 ion exchange resin	47
Rubidium extraction from mineral and brine resources: A review	47
Separation of Li(I), Co(II), Ni(II), Mn(II), and Fe(III) from hydrochloric acid solution using a menthol-based hydrophobic deep eutectic solvent	46
Leaching of lepidolite and recovery of lithium hydroxide from purified alkaline pressure leach liquor by phosphate precipitation and lime addition	44
Selective recovery of vanadium pentoxide from spent catalysts of sulfuric acid production: Sustainable approach	42
Recovery of scandium from red mud by leaching with titanium white waste acid and solvent extraction with P204	39
Energy efficient process for recovery of rare earths from spent NdFeB magnet by chlorination roasting and water leaching	39
A single-step process to leach out rare earth elements from coal ash using organic carboxylic acids	38
The efficiency of scrap Cu and Al current collector materials as reductants in LIB waste leaching	37
Chalcopyrite leaching in novel lixiviants	37
Effect of quartz crystal structure transformations on the removal of iron impurities	36

Bioleaching to reprocess sulfidic polymetallic primary mining residues: Determination of metal leaching mechanisms	35
Recovery of scandium from spent sulfuric acid solution in titanium dioxide production using synergistic solvent extraction with D2EHPA and primary amine N1923	35
Organophosphorous extractants for metals	35
Stepwise separation and recovery of molybdenum, vanadium, and nickel from spent hydrogenation catalyst	34
Extraction of platinum(IV) by hydrophobic deep eutectic solvents based on trioctylphosphine oxide	33
Recovery of germanium and indium from leaching solution of germanium dross using solvent extraction with TOA, TBP and D2EHPA	32
Recovery of gold(III) and iridium(IV) using magnetic layered double hydroxide (Fe3O4/Mg-Al-LDH) nanocomposite: Equilibrium studies and application to real samples	31
Resynthesizing of lithium cobalt oxide from spent lithium-ion batteries using an environmentally benign and economically viable recycling process	31
New insights in the leaching kinetics of cathodic materials in acidic chloride media for lithium-ion battery recycling	31
High purity scandium extraction from red mud by novel simple technology	31
Kinetics and mechanism of arsenopyrite leaching in nitric acid solutions in the presence of pyrite and Fe(III) ions	31