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Staff Profile

Associate Professor Geoffrey Simate

Position ASSOCIATE PROFESSOR
QualificationsBEng, MSc(Eng), PhD, MSAIMM, MSAIChE, MAmerChemSoc
Phone 0117177570
Email Geoffrey.Simate@wits.ac.za
Organisational Unit School of Chemical and Metallurgical Engineering

  • Carbon Nanotechnology: The production and applications of carbon nanotubes
  • Water treatment:The use of carbon nanotubes and biomass for the treatment of wastewater
  • Bio/hydro-metallurgy: The use of bacteria in mineral beneficiation, and bioremediation

D r. Geoffrey S. Simate has a PhD degree & an MSc (Eng) degree in Chemical Engineering from the University of the Witwatersrand, Johannesburg (South Africa), and a BEng honours degree in Chemical Engineering from the University of Birmingham (UK). Geoffrey's research interests are in the areas of water treatment, (bio) hydrometallurgy, and nanotechnology. He has published over 40 research papers, one edited book, and five book chapters, which have so far been cited more than 400 times. His current h-index and i10-index are 12 and 13, respectively. He is a C3 NRF-rated scientist, which shows that he is an established researcher who has produced a body of quality work, the core of which has coherence and attests to ongoing engagement with the field, and has demonstrated the ability to conceptualise problems and apply research methods to investigating them. Geoffrey is a reviewer of several international journals, and has examined several postgraduate dissertations and thesis from various universities. He has more than 9 years of hydrometallurgical industrial experience where he held various senior engineering positions including that of senior assistant metallurgical engineer, metallurgist, process controller/engineer, and plant manager. 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 (TG#10) of the Global Network of Nanotechnology and its applications to Road Materials and Pavements from 2012 to 2014. He is currently 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. He is a member of SAIMM and SAIChE.

Nanotechnology, biotechnology, water treatment, bio/hydro-metallurgy

Publications
Simate, G. S.
Water treatment and reuse in breweries
ISBN: 978-1-7824-2331-7, Journal: Woodhead Publishing Limited, Book Chapter 20, pp 425 - 456
- Year: 2015
Simate, G. S.
The role of modelling in acid mine drainage
ISBN: N/A, Journal: Africa Institute of South Africa, Book Chapter XXX, pp XX - XX
- Year: 2015
Simate, G. S.
The use of carbon nanotubes in the treatment of water and wastewater
ISBN: 978-1-4822-5394-8, Journal: CRC Press, Book Chapter 31, pp 705 - 717
- Year: 2015
Nleya, Y., Simate, G. S., Ndlovu, S.
Sustainability assessment of the recovery and utilisation of acid from acid mine drainage
ISBN: N/A, Journal: Journal of Cleaner Production xx - xx, pp xx - xx
- Year: 2015
Ntimbani, R. N., Simate, G. S., Ndlovu, S.
Removal of copper ions from dilute synthetic solution using staple ion exchange fibres: Dynamic studies
ISBN: N/A, Journal: Brazilian Journal of Chemical Engineering XX, pp XX - XX
- Year: 2015
Yah, C. S., Simate, G. S.
Nanoparticles as potential new generation broad spectrum antimicrobial agents
ISBN: N/A, Journal: DARU Journal of Pharmaceutical Sciences 23 (1), pp 43
- Year: 2015
Moothi, K., Simate, G. S., Falcon, R., Iyuke, S. E., Meyyappan, M.
Carbon nanotube synthesis using coal pyrolysis
ISBN: N/A, Journal: Langmuir 31, pp 9464 - 9472
- Year: 2015
Simate, G. S., Ndlovu, S.
The removal of heavy metals in a packed bed column using immobilized cassava peel waste biomass
ISBN: N/A, Journal: Journal of Industrial and Engineering Chemistry 21, pp 635 - 643
- Year: 2015
Ntimbani, R. N., Simate, G. S., Ndlovu, S.
Removal of copper ions from dilute synthetic solution using staple ion exchange fibres: Equilibrium and kinetic studies
ISBN: N/A, Journal: Journal of Environmental Chemical Engineering 3 (2), pp 1258 - 1266
- Year: 2015
Simate, G. S.
The treatment of brewery wastewater for reuse by integration of coagulation/flocculation and sedimentation with carbon nanotubes 'sandwiched' in a granular filter bed
ISBN: N/A, Journal: Journal of Industrial and Engineering Chemistry 21, pp 1277 - 1285
- Year: 2015
Zhang, J., Walubita, L. F., Faruk, A. N. M., Karki, P., Simate, G. S.
Use of the MSCR test to characterize the asphalt binder properties relative to HMA rutting performance - A laboratory study
ISBN: N/A, Journal: Construction and Building Materials 94, pp 218 – 227
- Year: 2015
Li, J., Walubita, L. F., Simate, G. S., Alvarez, A. E., Liu, W.
Use of ground-penetrating radar for construction monitoring and evaluation of perpetual pavements
ISBN: N/A, Journal: Natural Hazards 75, pp 141-161
- Year: 2015
Simate, G. S., Ndlovu, S.
Acid mine drainage: Challenges and opportunities
ISBN: N/A, Journal: Journal of Environmental Chemical Engineering 2(3), pp 1785 - 1803
- Year: 2014
Simate, G. S., Yah, C. S.
The use of carbon nanotubes in medical applications - is it a success story?
ISBN: N/A, Journal: Occupational Medicine and Health Affairs 2 (1), pp 147
- Year: 2014
Ndlovu, S., Simate, G. S., Mchibwa, K. A., Giaveno, A.
Characterization of nanoprecipitates formed from the forced hydrolysis of bioleach liquors under different pH conditions
ISBN: N/A, Journal: Journal of Industrial and Engineering Chemistry 20 (5), pp 3578 - 3583
- Year: 2014
Simate, G. S., Moothi, K., Meyyappan, M., Iyuke, S. E., Ndlovu, S., Falcon, R., Heydenrych., M.
Kinetic model of carbon nanotube production from carbon dioxide in a floating catalytic chemical vapour deposition reactor
ISBN: N/A, Journal: RSC Advances 4, pp 9564-9572
- Year: 2014
Li, J., Oh, J., Naik, B., Simate, G. S., Walubita, L. F.
Laboratory characterization of cracking-resistance potential of asphalt mixes using overlay tester
ISBN: N/A, Journal: Construction and Building Materials 70, pp 130 – 140
- Year: 2014
Simate, G. S., Ndlovu, S., Iyuke, S. E., Walubita, L. F.
Biotechnology and nanotechnology: A means for sustainable development in Africa
ISBN: 978-3-642-29641-3, Journal: Springer-Verlag, Book Chapter 9, pp 159 - 191
- Year: 2013
Ndlovu, S., Simate, G. S., Seepe, L., Shemi, A., Sibanda, V., van Dyk, L.
Removal of Co2 , V3 and Cr3 from synthetic effluents using cassava waste
ISBN: N/A, Journal: South African Journal of Chemical Engineering 18 (1), pp 51-69
- Year: 2013
Simate, G. S., Iyuke, S. E., Ndlovu, S., Heydenrych, M.
The heterogeneous coagulation and flocculation of brewery wastewater using carbon nanotubes
ISBN: N/A, Journal: Water Research 46 (4), pp 1185 - 1197
- Year: 2012
Simate, G. S., Iyuke, S. E., Ndlovu, S., Heydenrych, M., Walubita, L. F.
Human health effects of residual carbon nanotubes and traditional water treatment chemicals in drinking water
ISBN: N/A, Journal: Environment International 39 (1), pp 38-49
- Year: 2012
Yah, C. S., Simate, G. S., Iyuke, S. E.
Nanoparticles toxicity and their routes of exposures
ISBN: N/A, Journal: Pakistan Journal of Pharmaceutical Sciences 25 (2), pp 477-491
- Year: 2012
Madigoe, E. M., Iyuke, S. E., Simate, G. S., Lefofana, K., Mthembu, S.
Formulation and optimization of empirical models using Response Surface Methodology co-relating medium concentration, temperature, and yeast concentration to ethanol production during fermentation
ISBN: N/A, Journal: South African Journal of Chemical Engineering 16(1), pp 76-103
- Year: 2012
Walubita, L. F., Simate, G. S., Ofori-Abebresse, E., Epps-Martin, A., Lytton, R. L., Sanabria, L. E.
Mathematical formulation of HMA crack initiation and crack propagation models based on continuum fracture-mechanics and work-potential theory
ISBN: N/A, Journal: International Journal of Fatigue 40, pp 112 - 119
- Year: 2012
Iyuke, S. E., Simate, G. S.
Synthesis of carbon nanomaterials in a swirled floating catalytic chemical vapour deposition reactor for continuous and large scale production
ISBN: 978-953-307-566-2, Journal: In tech, Book Chapter 2, pp 35-58
- Year: 2011
Simate, G. S., Cluett, J., Iyuke, S. E., Musapatika, E. T., Ndlovu, S., Walubita, L. F., Alvarez, A. E.
The treatment of brewery wastewater for reuse: State of the art
ISBN: N/A, Journal: Desalination 273, pp 235-247
- Year: 2011
Yah, C. S., Iyuke, S. E., Simate, G. S., Unuabonah, E. I., Bathgate, G., Matthews, G.; Cluett, J.D.
Continuous synthesis of multi-walled carbon nanotubes from xylene using the swirled floating catalyst chemical vapour deposition technique
ISBN: N/A, Journal: Journal of Materials Research 26 (5), pp 640-644
- Year: 2011
Yah, C. S., Simate, G. S., Moothi, K., Maphutha, S. K., Iyuke, S. E.
Synthesis of large carbon nanotubes from ferrocene: The chemical vapour deposition technique
ISBN: N/A, Journal: Trends in Applied Sciences Research 6 (11), pp 1270-1279
- Year: 2011
Walubita, L. F., Alvarez, A. E., Simate G. S.
Evaluating and comparing different methods and models for generating relaxation modulus master-curves for asphalt mixes
ISBN: N/A, Journal: Construction and Building Materials 25 (5), pp 2619-2626
- Year: 2011
Alvarez, A. E., Fernandez, E. M., Martin, A. E., Reyes, O. J., Simate, G. S., Walubita, L. F.
Comparison of permeable friction course mixtures fabricated using asphalt rubber and performance-grade asphalt binders
ISBN: N/A, Journal: Construction and Building Materials 28, pp 427-436
- Year: 2011
Walubita, L. F., Liu, W., Scullion, T., Alvarez-Lugo, A. E., López-Esalas, Y. M., Simate, G.S.
Traffic weigh-in-motion (WIM) measurements and validation of the Texas perpetual pavement structural design concept
ISBN: N/A, Journal: Ingeniería & Desarrollo - Universidad del Norte29(2), pp 266-285
- Year: 2011
Simate, G. S., Ndlovu, S., Walubita, L. F.
The fungal and chemolithotrophic leaching of nickel laterites: Challenges and opportunities
ISBN: N/A, Journal: Hydrometallurgy 103, pp 150 - 157
- Year: 2010
Simate, G. S., Iyuke, S.E., Ndlovu, S., Yah, C., Walubita, L.F.
The production of carbon nanotubes from carbon dioxide: Challenges and opportunities
ISBN: N/A, Journal: Journal of Natural Gas Chemistry 19(5), pp 453 - 460
- Year: 2010
Walubita, L F., Simate, G. S., Oh, J. H.
Characterizing the ductility and fatigue-crack resistance potential of asphalt mixes based on the laboratory direct-tensile strength test
ISBN: N/A, Journal: Journal of the South African Institution of Civil Engineering 52 (2), pp 31- 40
- Year: 2010
Simate, G. S., Ndlovu, S., Gericke, M.
Bacterial leaching of nickel laterites using chemolithotrophic microorganisms: Process optimisation using response surface methodology and central composite rotatable design
ISBN: N/A, Journal: Hydrometallurgy 98, pp 241 - 246
- Year: 2009
Ndlovu, S., Simate, G. S., Gericke, M.
The microbial assisted leaching of nickel laterites using a mixed culture of chemolithotrophic microorganisms
ISBN: N/A, Journal: Advanced Materials Research 71-73, pp 493 - 496
- Year: 2009
Walubita, L. F., du Plessis, L., Huang, S-C., Simate, G. S., Liu, Z. (Editors)
Asphalt material characterization, accelerated testing, and highway management
ISBN: 978-0-7844-1042-4, Journal: American Society of Civil Engineers
- Year: 2009
Simate, G. S., Ndlovu, S.
Bacterial leaching of nickel laterites using chemolithotrophic microorganisms: Identifying influential factors using statistical design of experiments
ISBN: N/A, Journal: International Journal of Mineral Processing 88, pp 31 - 36
- Year: 2008
Simate, G. S., Ndlovu, S.
Characterisation of factors in the bacterial leaching of nickel laterites using statistical design of experiments
ISBN: N/A, Journal: Advanced Materials Research 20 - 21, pp 66 - 69
- Year: 2007

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