Biography

Dr. Geoffrey Simate Simate is currently working as Senior Lecturer at University of the Witwatersrand, Johannesburg, South Africa. He has completed his Ph.D. in Chemical Engineering from same University. He is having 5 years of lecturing experience, and 9 years of Hydrometallurgical industrial experience where he holds various Senior Engineering positions including that of Senior Assistant Metallurgical Engineer, Metallurgist, Process Controller/Engineer and Plants Manager. Currently he is teaching Chemical Engineering Design to final year students and Mass Transfer Operations to third year students. He is also involved in the teaching of MSc (Eng) degrees and short courses to postgraduate students. Furthermore, he has tutored several courses in the School of Chemical and Metallurgical Engineering for more than three (3) years. He has served as a regional representative in Africa for the Global Network of Nanotechnology and its applications to Road Materials and Pavements (GNN-RMP), and as a Chairperson for Carbon nanotube synthesis & road application’ technical group of the Global Network of Nanotechnology and its applications to Road Materials and Pavements from 2012 to 2014. His research interests are in the area of Carbon Nanotechnology, Water Treatment and (bio) Hydrometallurgy. His main research focus is in the development of new adsorbent materials such as Carbon Nanotubes (activated carbons and biomass from waste industrial material) for Water Treatment and Purification, Metal Recovery and Road Materials. He has published over 40 research papers, one edited book, and five book chapters, which have so far been cited more than 400 times. He is professional member of South African Institution of Chemical Engineers, South Africa, Southern African Institute of Mining and Metallurgy, South Africa, Engineering Institution of Zambia, Zambia, registered engineer in Engineers Registration Board, Zambia, and associate member of Institute of Chemical Engineers, U.K. Currently he is a reviewer of several international journals, e.g., Separation Science and Technology, Environmental Technology, Journal of Colloid and Interface Science, Waste Management Research, Particulate Science and Technology, Construction & Building Materials, and Journal of Engineering and Technology Research.

Area of Interest:

Physical Science Engineering

100%

Carbon Nanotechnology

62%

Water Treatment

90%

Hydrometallurgy

75%

Metal Recovery

55%

Research Publications in Numbers

Books
0

Chapters
0

Articles
0

Abstracts
0

Selected Publications

Simate, G.S., 2015. The treatment of brewery wastewater for reuse by integration of coagulation/flocculation and sedimentation with carbon nanotubes sandwiched in a granular filter bed. J. Ind. Eng. Chem., 21: 1277-1285.
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Simate, G.S. and S. Ndlovu, 2015. The removal of heavy metals in a packed bed column using immobilized cassava peel waste biomass. J. Ind. Eng. Chem., 21: 635-643.
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Ntimbani, R.N., G.S. Simate and S. Ndlovu, 2015. Removal of copper ions from dilute synthetic solution using staple ion exchange fibres: Equilibrium and kinetic studies. J. Environ. Chem. Eng., (In Press). 10.1016/j.jece.2015.02.010.
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Li, J., L.F. Walubita, G.S. Simate, A.E. Alvarez and W. Liu, 2015. Use of ground-penetrating radar for construction monitoring and evaluation of perpetual pavements. Nat. Hazards, 75: 141-161.
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Simate, G.S., K. Moothi, M. Meyyappan, S.E. Iyuke, S. Ndlovu, R. Falcon and M. Heydenrych, 2014. Kinetic model of carbon nanotube production from carbon dioxide in a floating catalytic chemical vapour deposition reactor. RSC Adv., 4: 9564-9572.
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Simate, G.S. and S. Ndlovu, 2014. Acid mine drainage: Challenges and opportunities. J. Environ. Chem. Eng., 2: 1785-1803.
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Simate, G.S. and C.S. Yah, 2014. The use of carbon nanotubes in medical applications-is it a success story? Occup. Med. Health Affairs, Vol. 2. 10.4172/2329-6879.1000147.
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Ndlovu, S., G.S. Simate, K.A. Mchibwa and A. Giaveno, 2014. Characterization of nanoprecipitates formed from the forced hydrolysis of bioleach liquors under different pH conditions. J. Ind. Eng. Chem., 20: 3578-3583.
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Li, J., J. Oh, B. Naik, G.S. Simate and L.F. Walubita, 2014. Laboratory characterization of cracking-resistance potential of asphalt mixes using overlay tester. Constr. Build. Mater., 70: 130-140.
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Simate, G.S., S. Ndlovu, S.E. Iyuke and L.F. Walubita, 2013. Biotechnology and Nanotechnology: A Means for Sustainable Development in Africa. In: Chemistry for Sustainable Development in Africa, Gurib-Fakim, A. and J.N. Eloff (Eds.). Springer, Berlin, Germany, ISBN: 978-3-642-29641-3, pp: 159-191.
Ndlovu, S., G.S. Simate, L. Seepe, A. Shemi, V. Sibanda and L.D. Van Dyk, 2013. The removal of Co²⁺, V³⁺ and Cr³⁺ from waste effluents using cassava waste. South Afr. J. Chem. Eng., 18: 51-69.
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Yah, C.S., G.S. Simate and S.E. Iyuke, 2012. Nanoparticles toxicity and their routes of exposures. Pak. J. Pharmaceut. Sci., 25: 477-491.
PubMed |
Walubita, L.F., G.S. Simate, E. Ofori-Abebresse, A.E. Martin, R.L. Lytton and L.E. Sanabria, 2012. Mathematical formulation of HMA crack initiation and crack propagation models based on continuum fracture-mechanics and work-potential theory. Int. J. Fatigue, 40: 112-119.
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Simate, G.S., S.E. Iyuke, S. Ndlovu, M. Heydenrych, 2012. The heterogeneous coagulation and flocculation of brewery wastewater using carbon nanotubes. Water Res., 46: 1185-1197.
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Simate, G.S., S.E. Iyuke, S. Ndlovu, M. Heydenrych and L.F. Walubita, 2012. Human health effects of residual carbon nanotubes and traditional water treatment chemicals in drinking water. Environ. Int., 39: 38-49.
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Alvarez, A.E., E.M. Fernandez, A.E. Martin, O.J. Reyes, G.S. Simate and L.F. Walubita, 2012. Comparison of permeable friction course mixtures fabricated using asphalt rubber and performance-grade asphalt binders. Constr. Build. Mater., 28: 427-436.
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Yah, C.S., S.E. Iyuke, G.S. Simate, E.I. Unuabonah, G. Bathgate, G. Matthews and J.D. Cluett, 2011. Continuous synthesis of multiwalled carbon nanotubes from xylene using the swirled floating catalyst chemical vapor deposition technique. J. Mat. Res., 26: 640-644.
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Yah, C.S., G.S. Simate, K. Moothi, K.S. Maphutha and S.E. Iyuke, 2011. Synthesis of large carbon nanotubes from ferrocene: The chemical vapour deposition technique. Trends Applied Sci. Res., 6: 1270-1279.
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Walubita, L.F., W. Liu, T. Scullion, A.E. Alvarez-Lugo, Y.M. Lopez-Esalas and G. Simate, 2011. Traffic Weigh-In-Motion (WIM) measurements and validation of the Texas perpetual pavement structural design concept. Ingenieria Desarrollo, 29: 266-285.
Direct Link |
Walubita, L.F., A.E. Alvarez and G.S. Simate, 2011. Evaluating and comparing different methods and models for generating relaxation modulus master-curves for asphalt mixes. Constr. Build. Mater., 25: 2619-2626.
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Simate, G.S., J. Cluett, S.E. Iyuke, E.T. Musapatika, S. Ndlovu, L.F. Walubita and A.E. Alvarez, 2011. The treatment of brewery wastewater for reuse: State of the art. Desalination, 273: 235-247.
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Madigoe, E.M., S.E. Iyuke, G.S. Simate, K. Lefofana and S. Mthembu, 2011. Formulation and optimization of empirical models using response surface methodology co-relating medium concentration, temperature and yeast concentration to ethanol production during fermentation. South Afr. J. Chem. Eng., 16: 76-103.
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Iyuke, S.E. and G.S. Simate, 2011. Synthesis of Carbon Nanomaterials in a Swirled Floating Catalytic Chemical Vapour Deposition Reactor for Continuous and Large Scale Production. In: Carbon Nanotubes-Growth and Applications, Naraghi, M. (Ed.). Chapter 2, In-Tech Publ., Rijeka, Croatia, ISBN 978-953-307-566-2, pp: 35-58.
Direct Link |
Walubita, L.F., G.S. Simate and J.H. Oh, 2010. Characterising the ductility and fatigue crack resistance potential of asphalt mixes based on the laboratory direct tensile strength test. J. South Afr. Inst. Civil Eng., 52: 31-40.
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Simate, G.S., S.E. Iyuke, S. Ndlovu, C.S. Yah and L.F. Walubita, 2010. The production of carbon nanotubes from carbon dioxide: Challenges and opportunities. J. Nat. Gas Chem., 19: 453-460.
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Simate, G.S., S. Ndlovu, W. Sehliselo, F.L. Walubita, 2010. The fungal and chemolithotrophic leaching of nickel laterites-challenges and opportunities. Hydrometallurgy, 103: 150-157.
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Walubita, L.F., L. du Plessis, S.C. Huang, G.S. Simate and Z. Liu, 2009. Asphalt Material Characterization, Accelerated Testing and Highway Management. American Society of Civil Engineers Virginia, USA., ISBN-13: 978-0784410424, Pages: 206.
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Simate, G.S., S. Ndlovu and M. Gericke, 2009. Bacterial leaching of nickel laterites using chemolithotrophic microorganisms: Process optimisation using response surface methodology and central composite rotatable design. Hydrometallurgy, 98: 241-246.
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Ndlovu, S., G.S. Simate and M. Gericke, 2009. The microbial assisted leaching of nickel laterites using a mixed culture of chemolithotrophic microorganisms. Adv. Mater. Res., 71-73: 493-496.
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Simate, G.S. and S. Ndlovu, 2008. Bacterial leaching of nickel laterites using chemolithotrophic microorganisms: Identifying influential factors using statistical design of experiments. Int. J. Miner. Process., 88: 31-36.
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Simate, G.S. and S. Ndlovu, 2007. Characterisation of factors in the bacterial leaching of nickel laterites using statistical design of experiments. Adv. Mater. Res., 20-21: 66-69.
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