Prof. Obiageli Regina Ajemba
Prof. Obiageli Regina Ajemba is a PROFESSOR in CHEMICAL ENGINEERING Department, Faculty Of Engineering in Nnamdi Azikiwe University
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Personal Information
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Phone: | |
Address: | Chemical Engineering, Faculty Of Engineering, Nnamdi Azikiwe University, Awka. |
Faculty/Unit: | FACULTY OF ENGINEERING |
Department/Sub-Unit: | CHEMICAL ENGINEERING |
Social Profiles
Academic Qualifications
| Degrees / Basic Certificates | |
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| 1 | Nnamdi Azikiwe University, Awka. (Doctor of Philosophy, September, 2012) September, 2007 to September, 2012 Ph.D Chemical Engineering |
| 2 | Enugu State University Of Science And Technology. (Master Degree, September, 2002) September, 1999 to October, 2002 M.Eng Chemical Engineering |
| 3 | Enugu State University Of Science And Technology. (Bachelor Degree, October, 1996) September, 1991 to August, 1996 B.Eng Chemical Engineering |
| 4 | Community Girls Secondary School, Isuofia. (SSCE, August, 1988) September, 1982 to July, 1988 |
| 5 | Central School, Abor. (FSLC, September, 1982) September, 1977 to July, 1982 |
Creative Output
| Journal Articles | |
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| 1 | Ezejames M. O., Ajemba R. O., Okey-Onyesolu C. F.. (2025, May), "Performance evaluation of a trickling filter system using modified palm fruit fiber for the removal of Ciprofloxacin", Unknown Journal or Publisher, Vol. 8, (Issue 2), pp 434 - 458 |
| 2 | Another A. A., Ajemba R. O., Okey-Onyesolu C. F., Nwachukwu J. O.. (2025, September), "Synthesis of clay and iron oxide nano composites for the removal of anionic dye from aqueous media", UNIZIK Journal of Engineering and Applied Sciences, Vol. 5, (Issue 3), pp 2744 - 2757 |
| 3 | Ibezim Echezona Jameskyrian, Emembolu Loveth Nwanneka, Ajemba Regina Obiageli. (2025, April), "Synergistic corrosion inhibition effect of rice and African bread fruit extract on mild steel in HNO3 medium", UNIZIK Journal of Engineering and Applied Sciences, Vol. 5, (Issue 4), pp 2964 - 2971 |
| 4 | Ezejames M. O., Ajemba R. O., Okey-Onyesolu C. F.. (2025, June), "Optimization of a trickling filter system for the removal of Ciprofloxacin from simulated pharmaceutical waste water", Journal of Material Science Research and Reviews, Vol. 5, (Issue 2), pp 469 - 487 |
| 5 | Ajemba Regina Obiageli, Nweke Chinenyenwa, John Uzochukwu, Ejiofor Callista. (2024, May), "Optimum bleaching efficiency of activated Ntezi bentonite using response surface methodology", Journal of Biomedical Research and Environmental Sciences, Vol. 5, (Issue 5), pp 420 - 429 |
| 6 | C. N. Nweke, R. O. Ajemba, I. C. Nwokedi, C. E. Chinyelu. (2024, July), "Performance evaluation of thermal and acid activated Smectite in bleaching palm oil", Journal of Engineering Research and Reports, Vol. 26, (Issue 7), pp 472 - 483 |
| 7 | Ajemba Regina O., Nweke Chinenyenwa N., Okoye Chisom C., Nwachukwu Josiah O.. (2023, February), "Adsorption of carotene from crude palm oil by activated Achalla clay", Journal of Engineering Research and Reports, Vol. 24, (Issue 5), pp 1 - 17 |
| 8 | Ajemba R. O., Nweke C. N., John S. N.. (2023, December), "Dynamic modeling of fixed bed column adsorption of Methylene blue onto modified Kono-Bowe (Nigeria) clay", International Journal of Modern Developments in Engineering and Science, Vol. 2, (Issue 12), pp 14 - 23 |
| 9 | Ogbu A. I., Ovuoraye P. E., Ajemba R. O., Dehghan M. H.. (2023, July), "Functionality and mechanistic parametric study of the potential of waste plantain peels and commercial be tonite for soybean oil refining", Scientific Reports |
| 10 | Okeke Winifred Chinelo, Ajemba Regina Obiageli,. (2022, September), "Adsorptive removal of carotene and phosphorus from palm oil using natural and modified Aguleri clay", International Journal of Advances in Engineering and Management, Vol. 4, (Issue 9), pp 761 - 774 |
| 11 | Igbonekwu L. I., Ajemba R. O.,, Ugonabo V. I.. (2022, March), "Kinetics and thermodynamics studies on sorption potential of hybrid adsorbent produced from snail she'll and rice husk", International Journal of Innovations in Engineering Research and Technology, Vol. 9, (Issue 3) |
| 12 | Nweke Chinenyenwa, Ajemba Regina Obiageli. (2022, January), "Clay characterization and bleaching of palm oil using activated Nibo clay", Bioremediation Science and Technology Research, Vol. 10, (Issue 1), pp 14 - 21 |
| 13 | Ojukwu V. E., Ajemba R. O.. (2022, June), "The effect of sawdust, cow dung, and calcium carbide waste on the properties of refractory bricks", UNIZIK Journal of Engineering and Applied Sciences, Vol. 21, (Issue 1), pp 799 - 812 |
| 14 | Okechukwu Nnanwube, Vincent Okafor, John Obibuenyi, Okechukwu Onukwuli, Regina Ajemba. (2020, January), "Optimization of colour pigments removal from palm oil using activated Ogbunike kaolinite", Sigma Journal of Engineering and Natural Sciences, Vol. 38, (Issue 1), pp 253 - 263 |
| 15 | Ikechukwu Nnanwube, Okechukwu Onukwuli, Vincent Okafor, John Obibuenyi, Regina Ajemba, Chinemelum Chukwuka. (2019, December), "Equilibrium, kinetics, and optimization studies on the bleaching of palm oil using activated Karaworo kaolinite", Journal of Material and Environmental Sciences, Vol. 11, (Issue 10), pp 1599 - 1615 |
| 16 | Okafor V. N., Nnanwube I. A., Obibuenyi J. I., Onukwuli O. D., Ajemba R. O.. (2019, July), "Removal of pigments from palm oil using activated In USA kaolinite: Equilibrium, Kinetic, and Thermodynamics Studies", Journal of Minerals and Materials Characterization and Engineering, Vol. 7, pp 157 - 170 |
| 17 | Onukwuli O. D., Nnanwube I. A., Obibuenyi J. I., Ajemba R. O.. (2019, July), "Response surface optimization of pigments removal from palm oil using activated Karaworo clay", International Journal of Research Advances in Engineering and Technology, Vol. 5, (Issue 3), pp 36 - 41 |
| 18 | Okafor V. N., Nnanwube I. A., Onukwuli O. D., Obibuenyi J. I., Ajemba R. O.. (2019, July), "Modeling and process parameters optimization of colour pigments removal from palm oil using activated Ibusa clay", International Journal of Innovative Studies in sciences, Engineering and Technology, Vol. 5, (Issue 7), pp 26 - 32 |
| 19 | Ajemba Regina Obiageli. (2017, March), "Adsorption of cationic dye onto low cost adsorbent synthesized from bentonite clay Part 1: Kinetics and thermodynamics studies", Journal of Chemical Technology and Metallurgy, Vol. 52, (Issue 3), pp 491 - 504 |
| 20 | C. C. Ihueze, A. E. Oluleye, C. E. Okafor, C. M. Obele, J. Abdul Rahman, S. Obuka, R. O. Ajemba. (2017, December), "Plantain fiber particle reinforced HDPE (PFPRHDPE) for gas line piping design", International Journal of Plastics Technology, Vol. 21, (Issue 2), pp 370 - 396 |
| 21 | Ajemba R. O., Ugonabo V. I., Okafor V. N.. (2017, April), "Sorption performance of activated Nkaliki clay in removing chromium (VI) ions from aqueous solution:Kinetics, Isotherm, and Thermodynamics studies", Journal of the Chemical Society of Pakistan, Vol. 39, (Issue 2), pp 224 - 233 |
| 22 | V. I. Ugonabo, M. C. Menkiti, R. O.. (2016, June), "Optimal and coag-flocculation kinetics evaluation of pharmaceutical industry effluent using organic and inorganic coagulants", Unknown Journal or Publisher, Vol. 8, (Issue 6), pp 39 - 56 |
| 23 | Ajemba Regina Obiageli. (2015, March), "Adsorption performance of modified bentonite in dye removal: Kinetics, Equilibrium, Thermodynamics, and Structural properties of the modified samples", Pakistan Journal of Industrial and Scientific Research Serial A: Physical Science, Vol. 58, (Issue 3), pp 157 - 171 |
| 24 | Ajana S., Onukwuli O. D., Ajemba R. O., Okey-Onyesolu C. F., Okoye C. C.. (2015, January), "Leaching of Okija kaolin iron oxide impurity with hydrochloric acid: optimization of dissolution conditions using response surface methodology", Integrated Journal of Engineering Research and Technology, Vol. 2, (Issue 1), pp 201 - 214 |
| 25 | Udeigwe Uchenna, Onukwuli Okechukwu, Ajemba Regina, Udeh Calistus. (2015, January), "Kinetics studies of hydrochloric acid leaching of alumina from Agbaja clay", International Journal of Research in Advanced Engineering and Technology, Vol. 1, (Issue 1), pp 64 - 72 |
| 26 | Ajemba R. O.. (2014, March), "Kinetics and equilibrium modeling of lead (II) and chromium (III) ions adsorption onto clay from Kono-Bowe, Nigeria", Turkish Journal of Engineering and Environmental Sciences, Vol. 38, (Issue 3), pp 455 - 479 |
| 27 | R. O. Ajemba. (2014, June), "Adsorption of Malachite Green from aqueous solution using activated Ntezi clay: Optimization, Isotherm, and Kinetic studies", International Journal of Engineering: Transactions C, Aspects, Vol. 27, (Issue 6), pp 839 - 854 |
| 28 | Ajemba Regina Obiageli. (2014, January), "Modification of Ntezi bentonite structure by hydrochloric acid: Process kinetics and structural properties of the modified samples", Pakistan Journal of Industrial and Scientific Research Serial A: Physical Science, Vol. 57, (Issue 1), pp 1 - 9 |
| 29 | Regina O. Ajemba, Okechukwu D. Onukwuli. (2014, January), "Assessing the influence of hydrochloric acid leaching on structural changes and bleaching performance of Nigerian clay from Udi", Physicochemical Problems of Mineral Processing, Vol. 50, (Issue 1), pp 349 - 358 |
| 30 | Ajemba Regina Obiageli. (2014, March), "Structural alteration of bentonite from Nkaliki by acid treatment:Studies of the kinetics and properties of the modified samples", International Journal of Advances in Engineering and Technology, Vol. 7, (Issue 1), pp 379 - 392 |
| 31 | R. O. Ajemba, P. K. Igbokwe, O. D. Onukwuli. (2013, March), "Optimization of colour pigments removal from palm oil by activated Ukpor clay using response surface methodology", Research Journal of Applied Sciences, Engineering, and Technology, Vol. 6, (Issue 3), pp 423 - 432 |
| 32 | R. O. Ajemba, V. I. Ugonabo, P. K. Igbokwe, O. D. Onukwuli. (2013, February), "Analysis of nitric acid activated Ukpor kaolin: Structural transformations and adsorptive properties", Canadian Journal of Pure and Applied Sciences, Vol. 7, (Issue 1), pp 2241 - 2250 |
| 33 | R. O. Ajemba, O. D. Onukwuli. (2013, May), "Nitric acid activated Ntezi clay: Structural and bleaching properties", International Journal of Engineering: Transactions A, Applications, Vol. 26, (Issue 5), pp 495 - 500 |
| 34 | Ugonabo V. I., Menkiti M. C., Ajemba R. O., Onukwuli O. D.. (2013, May), "Influence of coag-flocculation operating conditions in the remediation of pharmaceutical effluent using Pleurotus Tuberregium Sclerotic coagulant", International Journal of Engineering and Technology, IJET-IJENS, Vol. 13, (Issue 5), pp 12 - 23 |
| 35 | R. O. Ajemba, P. K. Igbokwe, O. D. Onukwuli. (2013, June), "Optimization of colour pigments removal from palm oil by activated Ukpor clay using response surface methodology", Research Journal of Applied Sciences, Engineering, and Technology, Vol. 6, (Issue 3), pp 423 - 432 |
| 36 | Kamen F. L., Igbokwe P. K., Opebiyi S. O., Okolomike R. O.. (2013, February), "Vapour phase dehydrogenation of ethanol using heterogeneous modified kaolinite catalyst", International Journal of Science and Engineering Investigations, Vol. 2, (Issue 16), pp 23 - 25 |
| 37 | Regina O. Ajemba, Okechukwu D. Onukwuli. (2013, January), "Adsorptive removal of colour pigments from palm oil using activated Nteje clay: Kinetics, Equilibrium, and Thermodynamics Studies", Physicochemical Problems of Mineral Processing, Vol. 49, (Issue 1), pp 369 - 381 |
| 38 | Ajemba Regina Obiageli. (2013, June), "Alteration of bentonite from Ugheli by nitric acid activation: Kinetics and physicochemical properties", Indian Journal of Science and Technology, Vol. 6, (Issue 2), pp 4076 - 4083 |
| 39 | Ajemba Regina Obiageli. (2012, April), "Modification of the physicochemical properties of Udi clay mineral to enhance its adsorptive capacity", Advances in Applied Science Research, Vol. 3, (Issue 4), pp 2042 - 2049 |
| 40 | Ajemba Regina Obiageli, Onukwuli Okechukwu Dominic. (2012, March), "Kinetics model for Ukpor clay dissolution in hydrochloric acid solution", Journal of Emerging Trends in Engineering and Applied Sciences, Vol. 3, (Issue 3), pp 448 - 454 |
| 41 | Ajemba Regina Obiageli, Onukwuli Okechukwu. (2012, August), "Determination of the optimum dissolution conditions of Ukpor clay in hydrochloric acid using response surface methodology", International Journal of Engineering Research and Application, Vol. 2, (Issue 5), pp 732 - 742 |
| 42 | Ajemba Regina Obiageli. (2012, July), "Enhancement of physicochemical properties of Nteje clay to increase its bleaching performance using acid activation", International Journal of Engineering Research and Application, Vol. 2, (Issue 5), pp 281 - 288 |
| 43 | R. O. Ajemba, P. K. Igbokwe, O. D. Onukwuli. (2012, May), "Kinetics, equilibrium, and thermodynamics studies of colour pigments removal from palm oil using activated Ukpor clay", Archives of Applied Science Research, Vol. 4, (Issue 5), pp 1958 - 1966 |
| 44 | Ajemba Regina Obiageli. (2012, December), "Optimum activation conditions of Ughelli bentonite for palm oil bleaching using response surface methodology", Australian Journal of Basic and Applied Sciences, Vol. 6, (Issue 12), pp 186 - 197 |
| 45 | R. O. Ajemba and O. D. Onukwuli. (2012, March), "Dissolution kinetics and mechanism of reaction of Udi clay in nitric acid solution", American Journal of Scientific and Industrial Research, Vol. 3, (Issue 3), pp 115 - 121 |
| 46 | Ajemba Regina Obiageli, Onukwuli Okechukwu. (2012, May), "Evaluation of the effects of acid activation on adsorptive properties of clay from Ukpor in bleaching palm oil", International Journal of Multidisciplinary Sciences and Engineering, Vol. 3, (Issue 5), pp 46 - 52 |
| 47 | Ajemba R. O., Onukwuli O. D.. (2012, May), "Studies of the effects of hydrochloric acid leaching on the structural and adsorptive performance of Nteje (Nigeria) clay", International Journal of Engineering Research and Technology, Vol. 1, (Issue 3) |
| 48 | Ajemba R. O., Onukwuli O. D.. (2012, May), "Application of the shrinking core model to the analysis of alumina leaching from Ukpor clay using nitric acid", International Journal of Engineering Research and Technology, Vol. 1, (Issue 3) |
| 49 | R. O. Ajemba, V. I. Ugonabo, V. N. Okafor, O. D. Onukwuli. (2012, April), "Optimization of alumina leaching conditions from Ukpor clay in H2SO4 using response surface methodology", American Journal of Scientific Research, Vol. 77, (Issue 4) |
| 50 | Ajemba R. O., Onukwuli O. D.. (2012, September), "Investigation of the effects of sulphuric acid modification on the structural and bleaching performance of Ukpor clay", Journal of Basic and Applied Scientific Research, Vol. 2, (Issue 9), pp 9438 - 9445 |
| 51 | Ajemba R. O., Onukwuli O. D.. (2012, May), "Process optimization of sulphuric acid leaching of alumina from Nteje clay using Central composite rota table design", International Journal of Multidisciplinary Sciences and Engineering, Vol. 3, (Issue 5) |
| 52 | Ajemba Regina Obiageli, Onukwuli Okechukwu. (2012, March), "Response surface optimization of palm oil bleaching using hydrochloric acid activated Ukpor clay", European Journal of Scientific Research, Vol. 82, (Issue 3), pp 325 - 339 |
| 53 | P. K. Igbokwe, F. L. Olebunne, R. O. Okolomike. (2010, January), "Empirical modeling of the vapour phase dehydrogenation of ethanol using heterogeneous modified clay catalyst", Journal of Engineering and Applied Sciences, Vol. 6, (Issue 1), pp 8 - 10 |
| 54 | P. K. Igbokwe, V. I. Ugonabo, R. O. Okolomike. (2008, April), "Kinetics of vapour phase oxidative de hydrogenation of ethanol with catalyst from local clay resources", Journal of Applied Sciences, Vol. 11, (Issue 1), pp 7580 - 7584 |
| 55 | P. K. Igbokwe, R. O. Okolomike. (2008, January), "Adsorption of heavy metals from aqueous solution using activated carbon from waste groundnut shells", World Journal of Biotechnology, Vol. 9, (Issue 1), pp 1432 - 1437 |
| 56 | P. K. Igbokwe, J. T. Nwabanne, R. O. Okolomike. (2008, January), "Adsorption of lead and cadmium from waste water using coconut shell activated carbon", Anachem Journal, Vol. 2, (Issue 1), pp 237 - 244 |
| 57 | P. K. Igbokwe, R. O. Okolomike, S. O. Nwokolo. (2008, February), "Zeolite for drying ethanol-water and methanol-water systems from a Nigerian clay resource", Journal of the University of Chemical Technology and Metallurgy, Vol. 43, (Issue 1), pp 109 - 112 |
| 58 | R. O. Okolomike, F. X. O. Ugodulunwa, O. D. Onukwuli. (2006, February), "Production of concrete from alternate sources", Journal of Engineering and Applied Sciences, Vol. 2, (Issue 2), pp 126 - 132 |
| 59 | V. N. Okafor, R. O. Okolomike, O. D. Onukwuli. (2006, February), "Fermentation of sorghum", Journal of Engineering and Applied Sciences, Vol. 2, (Issue 2), pp 73 - 82 |
| 60 | F. X. O. Ugodulunwa, C. C. Akagu, D. C. Nwosu, R. O. Okolomike, O. D. Onukwuli. (2003, September), "Effects of additives on the quality of refractory bricks produced from Enugu fire clay", Journal of Science and Technology, Vol. 9, pp 43 - 54 |
Academic Leadership Qualities
| Examinerships | |
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| 1 | Chief Examiner, "Undergraduate degree" (January, 2020 to December, 2023). Completed External Exam |