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 2020-04-01 to 2024-04-01.)

Article	Citations
Recent progress in impurity removal during rare earth element processing: A review	82
Critical review on secondary zinc resources and their recycling technologies	80
Research progress on leaching technology and theory of weathered crust elution-deposited rare earth ore	72
A review of hydrometallurgy techniques for the removal of impurities from metallurgical-grade silicon	68
Prospective directions for biohydrometallurgy	67
Removal of iron, aluminium, manganese and copper from leach solutions of lithium-ion battery waste using ion exchange	61
Recovery of scattered and precious metals from copper anode slime by hydrometallurgy: A review	54
A review on extractive metallurgy of tantalum and niobium	51
Bioleaching of gold from waste printed circuit boards by alkali-tolerant Pseudomonas fluorescens	50
Leaching of cathode materials from spent lithium-ion batteries by using a mixture of ascorbic acid and HNO3	48
Bioleaching of cobalt from Cu/Co-rich sulfidic mine tailings from the polymetallic Rammelsberg mine, Germany	46
Recovery of gallium from leach solutions of zinc refinery residues by stepwise solvent extraction with N235 and Cyanex 272	46
Removal of thorium and uranium from leach solutions of ion-adsorption rare earth ores by solvent extraction with Cextrant 230	45
Enhancing the Li+ adsorption and anti-dissolution properties of Li1.6Mn1.6O4 with Fe, Co doped	43
Separation of cobalt and lithium from spent lithium-ion battery leach liquors by ionic liquid extraction using Cyphos IL-101	42
A review of the recovery of precious metals using ionic liquid extractants in hydrometallurgical processes	41
Recovery of rare earth elements from waste streams using membrane processes: An overview	40
Processing of lithium ores: Industrial technologies and case studies – A review	40
Bioleaching of cobalt from sulfide mining tailings; a mini-pilot study	40
Recovery of lithium from salt lake brine using a mixed ternary solvent extraction system consisting of TBP, FeCl3 and P507	40
Recovery of chromium(VI) in wastewater using solvent extraction with amide	38
Rubidium extraction from mineral and brine resources: A review	37
Selective recovery of vanadium pentoxide from spent catalysts of sulfuric acid production: Sustainable approach	37
Overview of cobalt resources and comprehensive analysis of cobalt recovery from zinc plant purification residue- a review	36
Separation of cobalt, nickel, and manganese in leach solutions of waste lithium-ion batteries using Dowex M4195 ion exchange resin	36

Recovery of vanadium from acid leaching solutions of spent oil hydrotreating catalyst using solvent extraction with D2EHPA (P204)	36
Novel bioleaching of waste lithium ion batteries by mixed moderate thermophilic microorganisms, using iron scrap as energy source and reducing agent	35
Recovery of scandium from red mud by leaching with titanium white waste acid and solvent extraction with P204	35
Solvent extraction of intra-lanthanides using a mixture of TBP and TODGA in ionic liquid	34
Leaching of lepidolite and recovery of lithium hydroxide from purified alkaline pressure leach liquor by phosphate precipitation and lime addition	34
The ultrasound leaching kinetics of gold in the thiosulfate leaching process catalysed by cobalt ammonia	33
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	31
Kinetics of nickel leaching from low-nickel matte in sulfuric acid solution under atmospheric pressure	31
Control foaming performance of phosphate rocks used for wet-process of phosphoric acid production by phosphoric acid	31
Stepwise extraction of gold and silver from refractory gold concentrate calcine by thiourea	31