OOIR: Observatory of International Research

Papers

(The H4-Index of Hydrometallurgy is 33. 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 2021-08-01 to 2025-08-01.)

Article	Citations
Ammonium fluoride roasting and water leaching of leucoxene concentrates to produce a high grade titanium dioxide resource (of the Yaregskoye deposit, Timan, Russia)	107
A novel method for the separation of niobium and titanium from sulfuric acid-oxalate solutions using N235 and MIBK	94
Green and low-carbon preparation of ammonium paratungstate by adding ammonia to ammonium metatungstate solution	78
A comparison of batch and semi-batch reactors for leaching battery cathodes (LiCoO2) under controlled addition of HCl and H2O2	76
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	71
Ternary extractant system consisting of PC-88A, TOPO, and Versatic 10 for recovery of scandium(III) from nickel laterite processing liquors	65
Cesium ion sorption on hybrid pectin-Prussian blue beads: Batch and column studies to remove radioactive cesium from contaminated wastewater	62
Process study of chloride roasting and water leaching for the extraction of valuable metals from spent lithium-ion batteries	60
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
A preliminary study of a sequential leaching process to recover Ag, Au, Cu, and Sn from E-waste	52
Utilization of CO2 as a precipitant to prepare aluminum hydroxide from NaAl(OH)4 solutions: Study on reaction kinetics and mechanism	52
Waste reduction and high value utilization of jarosite-alunite residue (JAR) produced from the recovery of spent lithium-ion battery	51
Kinetics of ultrasound-assisted solvent extraction of vanadium with methyltrioctylammonium chloride (MAC)	50
Study on preparation and recovery of cobalt hydroxide and cobalt carbonate	50
Continuous recovery of lithium and boron from Jezechake Salt Lake brine using fixed-bed adsorbers	50
A leaching, solvent extraction, stripping, precipitation and calcination process for the recovery of MoO3 and NiO from spent hydrofining catalysts	47
Research on the migration of rubidium and mineral phase changes during sulfuric acid leaching of biotite	45
Moisture absorption rates via capillary suction within packed beds – The effect of material and fluid properties with implications for heap leaching operations	42
Extraction of chloride from slag flush wastewater using solvent N235	41
Editorial Board	40
Editorial Board	40
Study on pre-oxidation of silver concentrate and leaching behaviour of Zn, Cu and In during oxygen-pressure leaching	39
Extraction of gold from a gold concentrate using a lixiviant synthesized by a roasting process	38
Scaling analysis of electrodeposited copper and the influence of a modified polysaccharide on surface roughness	37
Recovery of vanadium from direct acid leaching solutions of weathered crust vanadium‐titanium magnetite via solvent extraction with N235	35

Dissolution of Th0.25U0.75O2 sintered pellets: Impact of nitrate ions and nitrous acid	35
Thorium speciation in synthetic anhydrite: Implications for remediation and recovery of thorium from rare-earth mine tailings	35
Microwave acid baking of red mud for extraction of titanium and scandium values	35
On the mechanism of the dissolution of gypsum (calcium sulfate dihydrate)	35
Investigation into the effect of mechanical activation on the leaching of chalcopyrite in a glycine medium	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
Thermodynamic analysis and application for preparing FePO4 from nitric acid pressure leach laterite residue by selective leaching in phosphoric acid and induced precipitation	34
Determination of the kinetic parameters of leaching from experimental data using the non-porous shrinking particle model: Effect of error propagation	33