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 2021-04-01 to 2025-04-01.)

Article	Citations
Separation of Hf(IV) from Zr(IV) in thiocyanate medium with ionic liquid Aliquat 336	94
Editorial Board	91
Zinc cathodes produced with highly-variable DC current simulated from solar irradiance data	82
Editorial Board	77
Production of Mn3O4 nanoparticles from a manganiferous iron ore via reductive leaching, precipitation, and calcination	69
Cost effective selective separation of indium and germanium from zinc processing waste leach liquor using D2EHPA-YW100 synergistic system and selective stripping with HCl and NH4F	66
Pilot plant study on manganese bioleaching using biomass decomposition products as a nutrient source and electrolysis for oxide precipitation	64
The role of hydrogen peroxide in the acid dissolution of indium tin oxide (ITO) in the context of selective indium recovery from secondary sources	57
Dissolution and recrystallization of alum to separate cesium, rubidium and potassium using their different precipitation kinetics to reach higher purity than solubility equilibria based purity of MAl(	56
Metal sulfide precipitation mediated by an elemental sulfur-reducing thermoacidophilic microbial culture from a full-scale anaerobic reactor	54
A novel method for the separation of niobium and titanium from sulfuric acid-oxalate solutions using N235 and MIBK	52
Effects of pyrite, quartz and sodium sulfite on roasting of a refractory sulfide concentrate and gold, silver, copper leaching during cyanidation	51
A one-step preparation of superhydrophobic stainless steel mesh and application in raffinate cleaning technology as a coalescer for contaminated organic-water separation	49
Simultaneous extraction of molybdenum and silicon from sulphate leach solution of spent catalyst using trialkylamine (N235) and recovery of pure ammonium molybdate	47
Ternary extractant system consisting of PC-88A, TOPO, and Versatic 10 for recovery of scandium(III) from nickel laterite processing liquors	45
Hollow drop bubbles: A preliminary study of simplified prototype for improving copper(II) extraction with ACORGA® M5640 using coated bubble swarm	45
Kinetics of ultrasound-assisted solvent extraction of vanadium with methyltrioctylammonium chloride (MAC)	44
Sulfur dioxide as a thiourea stabilizer in the Carbon-in-Leach (CIL) process using a hydrodynamic cavitation-reactor for gold recovery from dump tailings	44
Recovery of rare earths in different media with novel dicarboxylate based ionic liquid and application to recycle SmCo magnets	44
Capture of copper cyanide complex ions based on self-assembly of ionic liquids actuation and application to cyanide wastewater	43
Selective dissolution of zinc and lead from electric arc furnace dust via oxidative thermolysis with polyvinyl chloride and water-leaching process	43
Distribution of scandium in red mud and extraction using Gluconobacter oxydans	38
The role of oxidants in the intensive cyanidation of gold. II. Sulfide mineral oxidation	37
The effect of pre-roasting on atmospheric sulfuric acid leaching of saprolitic laterites	37
Thermodynamic analysis and in situ powder X-ray diffraction investigation of the formation and transformation of mineral phases during pressure oxidation of pyrite	36

Facile and novel method for the recovery of gold from a calcined concentrate via copper–ammonia -thiourea system and activated carbon	36
Does galvanic coupling with pyrite increase the rate of dissolution of chalcopyrite under ambient conditions? An electrochemical study	35
A pilot scale test study with theoretical justification of reaction mechanism for the recovery of chromium(VI) based on solvent extraction using novel centrifugal extractors	34
Modelling the scale-up of the iodine-assisted chalcopyrite leaching in ferric sulfate media from reactors to columns and simulating heap operations	34
Multimodal assessment of the curing of agglomerated ores in the presence of chloride ions	33
Extraction and separation of strategic precious Ag from low-grade Mn-Ag ores in China: A short review of co-leaching and selective leaching processes	32
Separation of palladium and platinum metals by selective and simultaneous leaching and extraction with aqueous/non-aqueous solutions	31
Influence of ionic liquid (R4PSCN) for selective separation and recovery of copper from spent Cu Cr catalyst leach liquor	31
Biotechnological strategies to recover value from waste	31
Design of a continuous ion exchange process in battery metals recycling: From single column experiments towards a simulated moving bed configuration	31
Characterization of the solid leach residues from the iodine-assisted chalcopyrite leaching in ferric sulfate media	31