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 2021-09-01 to 2025-09-01.)

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)	111
A comparison of batch and semi-batch reactors for leaching battery cathodes (LiCoO2) under controlled addition of HCl and H2O2	98
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	78
Cesium ion sorption on hybrid pectin-Prussian blue beads: Batch and column studies to remove radioactive cesium from contaminated wastewater	73
Ternary extractant system consisting of PC-88A, TOPO, and Versatic 10 for recovery of scandium(III) from nickel laterite processing liquors	70
Research on the migration of rubidium and mineral phase changes during sulfuric acid leaching of biotite	62
Phase evolution and elemental distribution of zinc and germanium during the sulfide roasting, zinc fuming and leaching processes: Benefit of pretreating zinc oxide dust	61
A preliminary study of a sequential leaching process to recover Ag, Au, Cu, and Sn from E-waste	60
Kinetics of ultrasound-assisted solvent extraction of vanadium with methyltrioctylammonium chloride (MAC)	57
Green and low-carbon preparation of ammonium paratungstate by adding ammonia to ammonium metatungstate solution	55
A leaching, solvent extraction, stripping, precipitation and calcination process for the recovery of MoO3 and NiO from spent hydrofining catalysts	52
Utilization of CO2 as a precipitant to prepare aluminum hydroxide from NaAl(OH)4 solutions: Study on reaction kinetics and mechanism	51
A novel method for the separation of niobium and titanium from sulfuric acid-oxalate solutions using N235 and MIBK	51
Waste reduction and high value utilization of jarosite-alunite residue (JAR) produced from the recovery of spent lithium-ion battery	50
Continuous recovery of lithium and boron from Jezechake Salt Lake brine using fixed-bed adsorbers	48
Moisture absorption rates via capillary suction within packed beds – The effect of material and fluid properties with implications for heap leaching operations	45
Determination of the kinetic parameters of leaching from experimental data using the non-porous shrinking particle model: Effect of error propagation	43
Dissolution of Th0.25U0.75O2 sintered pellets: Impact of nitrate ions and nitrous acid	43
Extraction of chloride from slag flush wastewater using solvent N235	43
Reducing silica in zirconium leachate from washed and dried frit powder: Role of cold and concentrated nitric acid and avoidance of crud formation	42
Atmospheric acid leaching of powdery Ni-Co-Fe alloy derived from reductive roasting of limonitic laterite ore and recovery of battery grade iron phosphate	42
Thermodynamic analysis and application for preparing FePO4 from nitric acid pressure leach laterite residue by selective leaching in phosphoric acid and induced precipitation	40
Editorial Board	37
Editorial Board	37
Study on pre-oxidation of silver concentrate and leaching behaviour of Zn, Cu and In during oxygen-pressure leaching	36

Extraction of gold from a gold concentrate using a lixiviant synthesized by a roasting process	35
Scaling analysis of electrodeposited copper and the influence of a modified polysaccharide on surface roughness	35
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	34
Thorium speciation in synthetic anhydrite: Implications for remediation and recovery of thorium from rare-earth mine tailings	33
Recovery of vanadium from direct acid leaching solutions of weathered crust vanadium‐titanium magnetite via solvent extraction with N235	33
Microwave acid baking of red mud for extraction of titanium and scandium values	33
The role of P(V) salts in inhibiting CaCO3 precipitation in the uranium in-situ leaching process using CO2 and O2	33
Cobalt and nickel separation in aqueous two-phase systems with polyethylene glycol 20,000 and sodium electrolytes	33