Prof. BABA ABDULLAHI ALAFARA
@unilorin.edu.ng
Professor, Faculty of Physical Sciences
University of Ilorin
RESEARCH, TEACHING, or OTHER INTERESTS
Analytical Chemistry, Chemistry
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mustapha A. Raji, Alafara A. Baba, and Folahan A. Adekola
Springer Science and Business Media LLC
Mustapha A. Raji, Alafara A. Baba, Abhilash, Ajeet Gangwar, and Jude O. Majasan
Springer Science and Business Media LLC
Ayo F. Balogun, Alafara A. Baba, Daud T. Olaoluwa, Abdulbaki O. Hammed, and Joel E. Akor
Informa UK Limited
Ayo F. Balogun and Alafara A. Baba
Springer Science and Business Media LLC
Ayo F. Balogun, Alafara A. Baba, Taiwo O. Ogundepo, and Joel E. Akor
Springer Science and Business Media LLC
Kehinde I. Omoniyi, Shemang Y. Chindo, Edith B. Agbaji, Alafara A. Baba, and Mustapha A. Raji
Springer Science and Business Media LLC
Alafara A. Baba, Mustapha A. Raji, Kehinde I. Omoniyi, Shemang Y. Chindo, Aduagba G. Kareem, Abhilash, Pratima Meshram, Amudat Lawal, and Folahan A. Adekola
Springer Nature Switzerland
Alafara A. Baba, Mamata Mohapatra, Christianah O. Adeyemi, Abdul G. F. Alabi, Rasheed A. Agava, Bernard O. Ozigi, and Jimoh M. Abdul
Springer Nature Switzerland
Abdullah S. Ibrahim and Alafara A. Baba
Informa UK Limited
Alafara A. Baba and Mustapha A. Raji
Elsevier BV
Mustapha A. Raji, Alafara A. Baba, and Abhilash
Springer Science and Business Media LLC
Abdullah S. Ibrahim and Alafara A. Baba
Springer Science and Business Media LLC
Abdullah S. Ibrahim and Alafara A. Baba
Elsevier BV
Fatai OKEOLA, Taofeeqat ABU, Aminat MOHAMMED, Muyiwa OROSUN, Abdullahi BABA, and Mariam Bolanle ADEBOJE
The Turkish Chemical Society
This study investigated the effects of prolonged storage conditions on the physicochemical parameter, toxic metals, microbial loads, and health risks assessment of randomly selected three brands of sachet and bottled water in North Central, Nigeria. One hundred eighty samples of water brands (sachet and bottled) were collected from 10 different factories and were grouped into three. They were analyzed immediately (initial), being exposed to mild sunlight (stored with a container) and exposed to intense sunlight (stored without a container) conditions for six weeks. The results of the physicochemical parameters (sachet and bottle) were within the limits set by the World Health Organization (WHO) and the Standard Organization of Nigeria (SON). While the results of heavy metals analysis for both sachet and bottled water recorded 0.15 - 0.51 mg/L (0.10 mg/L , 0.05 mg/L), 0.13 - 0.38 mg/L (0.015 mg/L, 0.01 mg/L) and 0.55 - 1.11 mg/L (0.03 mg/L, 0.3 mg/L) for Chromium (Cr), Lead (Pb) and Iron (Fe) respectively, as compared to the permissible limits (values in the bracket for each heavy metals) set by WHO and SON. The microbial analysis results ranged between 6.58 - 124.51 Cfu/100 mL, 0.52 - 37.56 Cfu/100 mL, 0.07 - 5.00 Cfu/100 mL, 0 - 2.07 Cfu/100 mL for Total Bacteria Count (TBC), Total Coliform Count (TCC), Faecal Coliform Count (FCC) and Total Fungal Count (TFC) respectively, which showed no effective quality control system. Incremental lifetime cancer risk (ILCR) assessment revealed a carcinogenic health risk to the populace drinking this water. The study concludes that water stored under sunlight for a long period is not good for human consumption and therefore adequate monitoring by the appropriate agencies is emphasized.
Shemang Y. Chindo, Kehinde I. Omoniyi, Edith B. Agbaji, Yakubu A. Dallatu, and Alafara A. Baba
Springer Science and Business Media LLC
Adebayo Isaac Olosho, Alafara Abdullahi Baba, Divine Uwaoma Okezie, Folahan Amoo Adekola, Kalenebari Kerein Kpabep, Temitayo Samson Ogedengbe, Adekunle Akanni Adeleke, Suleiman Suleiman Abba, and Ayuba Salihu
IEEE
As the world grapples with the challenges of resource scarcity and sustainability, the need to develop indigenous raw materials has gained paramount importance. To achieve self-sufficiency and reduce dependence on foreign sources, harnessing hydrometallurgical processes to extract valuable elements from ores presents a promising solution. Raw gypsum from Postikum, Nigeria, was leached in hydrochloric acid to obtain a pure calcium sulphate dihydrate. The dissolution kinetics have been reported elsewhere. This present study focused on optimizing the recovery of pure gypsum by varying acid concentration, temperature, and solid-liquid ratio. Additionally, the recyclability of regenerated hydrochloric acid was tested. The characterization of the raw gypsum ore (RWG), leached residue (LR), and recovered pure gypsum (RCG) was done using SEM-EDS, XRF, and XRD, respectively. The recovered gypsum was characterised by a brilliant white colour in contrast to the initial brown colour of the ore. XRF results show that RWG contains 50.48% SO3 while RCG contains 57.72 %. XRD results revealed that RWG contains gypsum, magnesite, mordenite, witherite, and calcite, LR contains mordenite, witherite and quartz while RCG consists of gypsum crystal phase only with no impurities. Remarkably, 85% RCG was successfully recovered at the fourth recycle stage of HCl lixiviant. These findings demonstrate that hydrometallurgical treatment of gypsum ore with hydrochloric acid can produce very pure gypsum.
Ayo F. Balogun, Alafara A. Baba, and Daud T. Olaoluwa
Informa UK Limited
Daud T. Olaoluwa, Alafara A. Baba, and Aboyeji L. Oyewole
Informa UK Limited
Alafara A. Baba, Fausat T. Akanji, Rasheed A. Agava, Abdul Ganiyu F. Alabi, Abdullah S. Ibrahim, Kuranga I. Ayinla, Mustapha A. Raji, Seyi E. Adeboye, and Mohammed S. Haruna
Springer Nature Switzerland
Alafara A. Baba, Daud T. Olaoluwa, Ayo F. Balogun, and Oluwagbemiga A. Adebola
Springer Nature Switzerland
Adeyemi Christianah, Santosh Deb Barma, Mamata Mohapatra, Alafara A. Baba, and Suddhasatwa Basu
Springer Nature Singapore
Aishat Y. Abdulkareem, Alafara A. Baba, Mustapha A. Raji, Kuranga I. Ayinla, Yusuf L. Shuaib-Babaita, and Olawale A. Salaudeen
Informa UK Limited
ABSTRACT This study highlights a hydrometallurgical method for the purification, extraction, and beneficiation of a multi-elemental leach liquor obtained via reductive leaching of spessartine ore, for the production of high-grade manganese compound. During these treatments, the effect of Cyanex®272 concentrations, pH, aqueous: organic (A/O) was quantified. At optimal conditions (Temperature = 27 ± 2°C, 0.2 mol/L Cyanex®272, pH = 4.5, A/O = 1:1), manganese extraction efficiency was >90%. The stripping of the loaded organic phase by 0.1 mol/L sulphuric acids yielded 95.7% in a single stripping stage. The resulting aqueous solution was appreciably beneficiated to produce manganese sulphate monohydrate (MnSO4.H2O: 49–315-9500, melting point = 702.8°C) via precipitation and crystallisation methods. Finally, a flow sheet summarising the analytical treatment steps was provided.
Kuranga I. Ayinla, Alafara A. Baba, Fausat T. Akanji, Amos I. Ambo, and Folahan A. Adekola
African Journals Online (AJOL)
ABSTRACT. This paper presents a study of dissolution kinetics of a Nigerian chalcopyrite ore in sulfuric acid lixiviant. The effects of acid concentration, temperature and particle diameter on the dissolution rates of chalcopyrite ore have been examined. The dissolution rates are significantly influenced by increase in temperature, hydrogen ion concentration [H+], and decrease in particle diameter. The experimental data for the dissolution rate have been analyzed with the shrinking core model which shows the rate controlling step for the dissolution of chalcopyrite ore occurs via surface chemical solution. With 4 M H2SO4 solution, about 91.6% of 10 g/L chalcopyrite ore at 80 oC was dissolved within 120 min using -90+75 µm particle diameter. The reaction order with respect to hydrogen ion concentration was found to be 0.57 with correlation coefficient 0.968. The calculated activation energy, (Ea) value of 44.9 kJ/mol for the dissolution process was established. However, the SEM morphology of the residues from leaching process showed that about 8.4% of the initial solid material contained admixtures of Fukuchilite (Cu0.42Fe0.58S2), and elemental sulphur (So) and are formed around the shrinking core of the unreacted material.
 
 KEY WORDS: Chalcopyrite, Sulfuric acid, Dissolution kinetics
 
 Bull. Chem. Soc. Ethiop. 2022, 36(1), 187-196. 
 DOI: https://dx.doi.org/10.4314/bcse.v36i1.15
Alafara A. Baba, Daud T. Olaoluwa, Kuranga I. Ayinla, Abdullah S. Ibrahim, Ayo F. Balogun, Sadisu Girigisu, Oluwagbemiga M. Adebola, and Jumoke Fasiku
Springer International Publishing
Alafara A. Baba, Christianah O. Adeyemi, Mamata Mohapatra, Mustapha A. Raji, Fausat T. Akanji, and Abdul G. F. Alabi
Springer International Publishing