Preparation of industrial ammonium metatungstate (AMT) from sulphuric-cum-phosphoric acid leaching by solvent extraction with aliquat-336 Alafara A. Baba, Sadisu Girigisu, Abdullah S. Ibrahim Canadian Journal of Chemical Engineering, 2026 In this study, the acid dissolution and subsequent solvent extraction of a Nigerian wolframite ore was examined. The combinations of sulphuric‐cum‐phosphoric acid solutions were used as the leachants. The effect of process parameters such as reaction temperature, concentration, and particle size were investigated. At optimal leaching conditions (2.0 M H2SO4 + 0.15 M H3PO4, 75°C, −90 + 75 μm), 93.7% of the ore reacted within 120 min. The Avrami model was proposed and considered based on the experimental data obtained in this study. The derived activation energy of 12.32 kJ/mol from the study indicates the reaction to be of an internal diffusion reaction model with minimal eco‐feasible energy. Suggesting that the process is energy saving and eco‐friendly. The extraction process by aliquat‐336 yielded 95% of pure tungsten at 27 ± 2°C. The optimization of pure tungsten solution through crystallization process gave high‐grade AMT of the form (NH4)6[H2W12O40] · 4H2O: 96‐901‐3322, melting point 101.4°C is therefore recommended for industrial applications in catalytic operations.
Recovery of Uranium from Bra Uranium Deposits by Nitric Acid Leaching Mustapha A. Raji, Derik J. van der Westhuizen, Sodiq O. Raji, Alafara A. Baba Journal of Sustainable Metallurgy, 2025 Today, the rate of energy consumption is increasing tremendously. Uranium, a critical energy metal, plays a vital role in the advancement of the nuclear industry. In this investigation, the extent of uranium ore dissolution was examined under various experimental conditions, including leachant concentration, reaction temperature, and particle size. At optimal conditions (2.5 mol/L HNO3, 75 °C, -90 + 75 µm), approximately 92.1% dissolution rate was achieved within 120 min. The activation energy (Ea), estimated to be 19.67 kJ/mol, indicates that the reaction is a diffusion-controlled mechanism and more economical than other studies. However, the thermodynamic parameters, including ΔH, ΔG, and ΔS, respectively, were estimated. The positive value of ΔH affirms that the uranium dissolution by nitric acid solution is an endothermic process. Hence, this investigation provides a valuable reference for future studies on Bra uranium deposits (Nigeria) cum other uranium mines with similar mineralogical indices. Graphical Abstract
PURIFICATION OF A PARGASITE RICH GANOPHYLLITE-OLIGOCLASE ORE BY OXALIC ACID SOLUTION: STATISTICS FOR INDUSTRIAL CONSIDERATIONS Journal of Chemical Technology and Metallurgy, 2022
Dissolution kinetics studies of Nigerian gypsum ore in hydrochloric acid Journal of Chemical Technology and Metallurgy, 2018
Spent galvanized zinc-ash processing part (II): Solvent extraction of zinc from leached liquor by Cyanex®272 Journal of Chemical Technology and Metallurgy, 2018
Extraction of zinc (II) by triphenylphosphite (TPP) in hydrochloric acid: Kinetics and mechanism International Journal of Physical Sciences, 2008
RECENT SCHOLAR PUBLICATIONS
Hydrometallurgical treatment of an indigenous bismutite ore: process optimization and kinetics analysis AF Balogun, AA Baba, BC Tripathy Chemical Papers, 1-15 , 2026 2026
Alkaline Leaching of Uranium from an Indigenous Boltwoodite Ore for Nuclear Fuel Production AA Baba, MA Raji, RB Bale, KI Ayinla, FT Akanji, DT Olaoluwa, ... TMS Annual Meeting & Exhibition, 179-184 , 2026 2026
Rare Metal Technology 2026 A Karamalidis, K Forsberg, T Ouchi, G Azimi, S Alam, NR Neelameggham, ... Springer Nature , 2026 2026
Materials Science Research Integrity: A Bibliometric Study of Retracted Articles AG Adeniyi, KO Iwuozor, EC Emenike, UD Inyang, MQ Ali, CA Adeyanju, ... Journal of Academic Ethics 24 (1), 47 , 2026 2026 Citations: 1
Preparation of industrial ammonium metatungstate (AMT) from sulphuric‐cum‐phosphoric acid leaching by solvent extraction with aliquat‐336 AA Baba, S Girigisu, AS Ibrahim The Canadian Journal of Chemical Engineering 104 (3), 1420-1429 , 2026 2026
Preparation of an Indigenous Bismutite Ore for Improved Bismuth-Based Alloys Production AA Baba, AF Balogun, BC Tripathy, FO Okeola, F Uba, AA Owolabi, ... TMS Annual Meeting & Exhibition, 175-181 , 2026 2026
Processing of Indigenous Spodumene Ore for Lithium Liberation: A Precursor for Industrial Lithium Battery Materials AA Baba, AY Abdulkareem, A Bello TMS Annual Meeting & Exhibition, 183-191 , 2026 2026
Preparation of an Indigenous Bismutite Ore for Improved Bismuth-Based Alloys AA Baba, AF Balogun, BC Tripathy, FO Okeola Energy Technology 2026: Carbon Dioxide Management and Other Technologies, 175 , 2026 2026
Processing of Indigenous Spodumene Ore AA Baba, AY Abdulkareem, A Bello Energy Technology 2026: Carbon Dioxide Management and Other Technologies, 183 , 2026 2026
Energy Technology 2026: Carbon Dioxide Management and Other Technologies O Yücel, W Song, E Detsi, S Alam, F Tesfaye, H Peng, C Iloeje, ... Springer Nature , 2026 2026
Extraction of bismuth from a Nigerian bismutite ore: an integrated selective leaching and precipitation approach AF Balogun, AA Baba Reaction Kinetics, Mechanisms and Catalysis, 1-13 , 2026 2026
Materials Science Research Integrity: A Bibliometric Study of Retracted Articles AA Baba, O Samuel, CA Adeyanju, MQ Ali, UD Inyang, EC Emenike, ... 2026
Recovery of Uranium from Bra Uranium Deposits by Nitric Acid Leaching MA Raji, DJ van der Westhuizen, SO Raji, AA Baba Journal of Sustainable Metallurgy 11 (4), 4216-4226 , 2025 2025 Citations: 4
Selective Extraction of Copper from Ammonia-Ammonium Sulphate Solution Using a Mixture of LIX 84-I and TBP: Parameter Determination AF Balogun, AA Baba, DT Olaoluwa Materials Circular Economy 7 (1), 13 , 2025 2025 Citations: 2
Leaching Kinetics of Crucial Metals from Bismutite Ore: Parameter Determination A Balogun, A Baba Journal of Sustainable Materials Processing and Management 5 (2), 94-103 , 2025 2025
Enrichment of a Nigerian plagioclase-rich feldspar ore by methanesulfonic acid solution for improved industrial application: kinetic and statistical analysis AF Balogun, AA Baba, DT Olaoluwa, AO Hammed, JE Akor Indian Chemical Engineer 67 (5), 581-595 , 2025 2025 Citations: 1
Degradation study on Indigo-carmine effluent using tungstic acid/Hydrogen peroxide system S Girigisu, B Alafara Journal of Chemistry Letters 6 (3), 175-180 , 2025 2025 Citations: 2
Clean preparation of chromium oxide (Cr 2 O 3 ) from low-grade indigenous chromite ore for use as paint pigment KI Ayinla, AA Baba, AA Mohammed, A Hota, S Sahoo, JK Das, ... Geosystem Engineering 28 (3), 201-210 , 2025 2025
Development of Optimal Extraction Conditions of Indigenous Lepidolite Ore as Raw Material for Lithium-ion Batteries AA Baba, DT Olaoluwa, AY Abdulkareem, JO Majasan, AS Aremu, ... TMS Annual Meeting & Exhibition, 1179-1187 , 2025 2025
Eco-feasible energy approach for industrial uranium compound preparation using uranyl pregnant leach solution (UPLS) AA Baba, MA Raji, CO Adeyemi, KI Ayinla, JO Majasan, RO Agava TMS Annual Meeting & Exhibition, 221-226 , 2025 2025 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Development of a combined pyro-and hydro-metallurgical route to treat spent zinc–carbon batteries AA Baba, AF Adekola, RB Bale Journal of Hazardous Materials 171 (1-3), 838-844 , 2009 2009 Citations: 136
Hydrometallurgical processing of manganese ores: a review AA Baba, L Ibrahim, FA Adekola, RB Bale, MK Ghosh, AR Sheik, ... Journal of minerals and materials characterization and engineering 2 (03 … , 2014 2014 Citations: 95
Characterization and kinetic study on ammonia leaching of complex copper ore AA Baba, MK Ghosh, SR Pradhan, DS Rao, A Baral, FA Adekola Transactions of Nonferrous Metals Society of China 24 (5), 1587-1595 , 2014 2014 Citations: 93
Hydrometallurgical processing of a Nigerian sphalerite in hydrochloric acid: Characterization and dissolution kinetics AA Baba, FA Adekola Hydrometallurgy 101 (1-2), 69-75 , 2010 2010 Citations: 91
Toxicity and speciation analysis of Organotin compounds OS Ayanda, AA Baba, OG Oladele Chemical Speciation and Bioavailability 24 (4), 216-226 , 2012 2012 Citations: 75
Talactoferrin alfa versus placebo in patients with refractory advanced non-small-cell lung cancer (FORTIS-M trial) S Ramalingam, J Crawford, A Chang, C Manegold, R Perez-Soler, ... Annals of oncology 24 (11), 2875-2880 , 2013 2013 Citations: 74
A study of dissolution kinetics of a Nigerian galena ore in hydrochloric acid AA Baba, FA Adekola Journal of Saudi Chemical Society 16 (4), 377-386 , 2012 2012 Citations: 74
Application of Cyanex® extractant in Cobalt/Nickel separation process by solvent extraction OS Ayanda, FA Adekola, AA Baba, BJ Ximba, OS Fatoki 2013 Citations: 71
Quantitative leaching of a Nigerian iron ore in hydrochloric acid AA Baba, FA Adekola, AO Folashade Journal of Applied Sciences and Environmental Management 9 (3), 15-20 , 2005 2005 Citations: 67
Bioleaching of Zn (II) and Pb (II) from Nigerian sphalerite and galena ores by mixed culture of acidophilic bacteria AA BABA, FA ADEKOLA, RF ATATA, RN AHMED, S PANDA Transactions of Nonferrous Metals Society of China 21 (11), 2535-2541 , 2011 2011 Citations: 62
Beneficiation of a Nigerian sphalerite mineral: solvent extraction of zinc by Cyanex® 272 in hydrochloric acid AA Baba, FA Adekola Hydrometallurgy 109 (3-4), 187-193 , 2011 2011 Citations: 55
Comparative analysis of the dissolution kinetics of galena in binary solutions of HCl/FeCl 3 and HCl/H 2 O 2 AA Baba, FA Adekola International Journal of Minerals, Metallurgy, and Materials 18 (1), 9-17 , 2011 2011 Citations: 53
Queuing process and its application to customer service delivery (A case study of Fidelity Bank Plc, Maiduguri) HR Bakari, HA Chamalwa, AM Baba International Journal of Mathematics and Statistics Invention (IJMSI) 2 (1 … , 2014 2014 Citations: 46
Purification of a Nigerian talc ore by acid leaching AA Baba, AS Ibrahim, RB Bale, FA Adekola, AGF Alabi Applied Clay Science 114, 476-483 , 2015 2015 Citations: 40
Comparative study of the kinetics of dissolution of laterite in some acidic media OS Ayanda, FA Adekola, OS FATOKI, BJ XIMBA Journal of Minerals and Materials Characterization and Engineering 10 (15 … , 2011 2011 Citations: 39
Dissolution kinetics and leaching of rutile ore in hydrochloric acid AA Baba, FA Adekola, EE Toye, RB Bale Journal of Minerals and Materials Characterization and Engineering 8 (10), 787 , 2009 2009 Citations: 39
Mineralogical characterization and leaching behavior of Nigerian ilmenite ore AA Baba, S Swaroopa, MK Ghosh, FA Adekola Transactions of Nonferrous Metals Society of China 23 (9), 2743-2750 , 2013 2013 Citations: 37
Solvent extraction of Pb (II) and Zn (II) from a Nigerian galena ore leach liquor by tributylphosphate and bis (2, 4, 4-trimethylpentyl) phosphinic acid AA Baba, FA Adekola Journal of King Saud University-Science 25 (4), 297-305 , 2013 2013 Citations: 35
Investigation of dissolution kinetics of a Nigerian tantalite ore in nitric acid AA Baba, FA Adekola, OI Dele-Ige, RB Bale Journal of Minerals and Materials Characterization and Engineering 7 (1), 83-95 , 2007 2007 Citations: 34
Leaching kinetics of a Nigerian complex covellite ore by the ammonia-ammonium sulfate solution AA Baba, AF Balogun, DT Olaoluwa, RB Bale, FA Adekola, AGF Alabi Korean Journal of Chemical Engineering 34 (4), 1133-1140 , 2017 2017 Citations: 29