OOIR: Observatory of International Research

Papers

(The H4-Index of Hydrometallurgy is 32. 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 2021-05-01 to 2025-05-01.)

Article	Citations
Ternary extractant system consisting of PC-88A, TOPO, and Versatic 10 for recovery of scandium(III) from nickel laterite processing liquors	100
Waste reduction and high value utilization of jarosite-alunite residue (JAR) produced from the recovery of spent lithium-ion battery	94
Study on preparation and recovery of cobalt hydroxide and cobalt carbonate	91
A comparison of batch and semi-batch reactors for leaching battery cathodes (LiCoO2) under controlled addition of HCl and H2O2	80
Lipophilic EDTA-based ligands in different diluents for the extraction of rare earths: Preliminary results with Nd(III), Dy(III) and Pr(III) in chloride and nitrate media	72
A novel method for the separation of niobium and titanium from sulfuric acid-oxalate solutions using N235 and MIBK	67
Process study of chloride roasting and water leaching for the extraction of valuable metals from spent lithium-ion batteries	66
Cesium ion sorption on hybrid pectin-Prussian blue beads: Batch and column studies to remove radioactive cesium from contaminated wastewater	63
Phase evolution and elemental distribution of zinc and germanium during the sulfide roasting, zinc fuming and leaching processes: Benefit of pretreating zinc oxide dust	57
Ammonium fluoride roasting and water leaching of leucoxene concentrates to produce a high grade titanium dioxide resource (of the Yaregskoye deposit, Timan, Russia)	57
Kinetics of ultrasound-assisted solvent extraction of vanadium with methyltrioctylammonium chloride (MAC)	56
A leaching, solvent extraction, stripping, precipitation and calcination process for the recovery of MoO3 and NiO from spent hydrofining catalysts	55
Continuous recovery of lithium and boron from Jezechake Salt Lake brine using fixed-bed adsorbers	52
Green and low-carbon preparation of ammonium paratungstate by adding ammonia to ammonium metatungstate solution	49
Moisture absorption rates via capillary suction within packed beds – The effect of material and fluid properties with implications for heap leaching operations	48
Use of dry grinding process to increase the leaching of gold from a roasted concentrate containing hematite in the thiosulfate system	46
Cobalt and nickel separation in aqueous two-phase systems with polyethylene glycol 20,000 and sodium electrolytes	46
A magnetic adsorbent with metal-organic framework based on ammonium phosphomolybdenum heteropoly tungstate (AWP): Selective adsorption of Rb+ and Cs+ from aqueous resources and stripping with ammonium	45
Extraction of chloride from slag flush wastewater using solvent N235	45
Determination of the kinetic parameters of leaching from experimental data using the non-porous shrinking particle model: Effect of error propagation	44
Atmospheric acid leaching of powdery Ni-Co-Fe alloy derived from reductive roasting of limonitic laterite ore and recovery of battery grade iron phosphate	44
Investigation into the effect of mechanical activation on the leaching of chalcopyrite in a glycine medium	41
High purity scandium extraction from red mud by novel simple technology	40
Recovery of vanadium from direct acid leaching solutions of weathered crust vanadium‐titanium magnetite via solvent extraction with N235	39
Selective removal of arsenic from high arsenic dust in the NaOH-S system and leaching behavior of lead, antimony, zinc and tin	39

Dissolution of Th0.25U0.75O2 sintered pellets: Impact of nitrate ions and nitrous acid	38
Editorial Board	37
Editorial Board	36
Study on pre-oxidation of silver concentrate and leaching behaviour of Zn, Cu and In during oxygen-pressure leaching	35
Reducing silica in zirconium leachate from washed and dried frit powder: Role of cold and concentrated nitric acid and avoidance of crud formation	35
Extraction of gold from a gold concentrate using a lixiviant synthesized by a roasting process	34
Microwave acid baking of red mud for extraction of titanium and scandium values	33
Thermodynamic analysis and application for preparing FePO4 from nitric acid pressure leach laterite residue by selective leaching in phosphoric acid and induced precipitation	32
Scaling analysis of electrodeposited copper and the influence of a modified polysaccharide on surface roughness	32
Hydrometallurgical processing of mining-impacted soils: A preliminary study to recover copper salts by leaching with seawater and crystallization	32
Investigating the effects of process parameters on the filtration performance of ferric hydroxide in a continuous MSMPR reactor	32
Production of ferronickel from limonitic laterite ore using hydrogen reduction and cementation	32
Thorium speciation in synthetic anhydrite: Implications for remediation and recovery of thorium from rare-earth mine tailings	32