Department of Chemical and Materials Engineering

Dr TY Leswifi (Associate Chair – Ethics)

College of Science, Engineering and Technology
School of Engineering
Department: Chemical Engineering
Senior Lecturer
Tel: 011 670 9288
E-mail: leswity@unisa.ac.za

Qualifications

  • PhD (Environmental Engineering)
  • M-Tech (Chemical Engineering) (TUT)
  • B-Tech (Chemical Engineering)(TUT)
  • National Diploma (Chemical Engineering)(TUT)

Fields of academic interests

  • Water and wastewater treatment

  • Adsorption technology

  • Nanotechnology for water treatment

  • Waste Biorefinery technologies

  • Renewable energy

Field of Specialisation

  • Water and wastewater treatment
  • Biorefinery

Journal articles

  • B Zulu, OA Oyewo, B Sithole, TY Leswifi, MS Onyango. 2020. Functionalized Sawdust-derived cellulose nanocrystalline adsorbent for efficient removal of vanadium from aqueous solution. Frontiers in Environmental Science 8, 56.
  • A Nkalane, OA Oyewo, TY Leswifi, MS Onyango. 2019. Application of coagulant obtained through charge reversal of sawdust-derived cellulose nanocrystals in the enhancement of water turbidity removal. Material Research Express 6, 105060
  • OA Oyewo, B Mutesse, TY Leswifi, MS Onyango. 2019. Highly efficient removal of nickel and cadmium from water using sawdust-derived cellulose nanocrystals. Journal of Environmental Chemical Engineering 7, 103251
  • NH Mthombeni, S Mbakop, SC Ray, TY Leswifi, A Ochieng, MS Onyango. 2018. Highly efficient removal of chromium (VI) through adsorption and reduction: A column dynamic study using magnetized natural zeolite-polypyrrole composite. Journal of Environmental Chemical Engineering 6 (4), 4008-4017.
  • AM Muliwa, TY Leswifi, MS Onyango. 2018. Performance evaluation of eggshell waste material for remediation of acid mine drainage from coal dump leachate. Minerals Engineering 122, 241-250.
  • AM Muliwa, TY Leswifi, A Maity, A Ochieng, MS Onyango. 2018. Fixed-bed operation for manganese removal from water using chitosan/bentonite/MnO composite beads. Environmental Science and Pollution Research, 1-15.
  • AM Muliwa, TY Leswifi, MS Onyango, A Maity. 2016. Magnetic adsorption separation (MAS) process: An alternative method of extracting Cr (VI) from aqueous solution using polypyrrole coated Fe3O4 nanocomposites. Separation and Purification Technology 158, 250-258. (ISI/DHET ACCREDITED JOURNAL; IMPACT FACTOR 3.36)
  • L Mukosha, MS Onyango, A Ochieng, TY Leswifi. 2015. Sorption Characteristics of Mixed Molecules of Glutaraldehyde from Water on Mesoporous Acid-Amine Modified Low-Cost Activated Carbon: Mechanism, Isotherm, and Kinetics. Journal of Chemistry 15, Article ID 757256, 13 pages. (ISI/DHET ACCREDITED JOURNAL; IMPACT FACTOR 1.30)
  • Bhaumik, M., Leswifi, T.Y., Maity, A., Srinivasu, V.V., Onyango, M.S. 2011. Removal of Fluorife from Aqueous by Polypyrroic / Fe3O4 Magnetic Nano Composite. Journal of Hazardous Materials, 186(1) (2011) 150-159. (ISI/DHET ACCREDITED JOURNAL; IMPACT FACTOR 6.06)
  • Onyango, M.S., Leswifi, T.Y., Aoyi, O., Kuchar, D. Otieno, F.A.O. and H. Matsuda. 2009. Breakthrough Analysis for Water Defluoridation Using Surface-Tailored Zeolite Fixed-Bed Column. Journal of Industrial and Engineering Chemistry Research, 48 (2009) 931-939. (ISI/DHET ACCREDITED JOURNAL; IMPACT FACTOR 2.84)

Professional positions, fellowships & awards

Professional affiliation

  • Engineering Council of South Africa (ECSA)

Other

Biography

Dr Leswifi is a senior lecturer in the department of Chemical Engineering, College of Science, Engineering and Technology (CSET), University of South Africa (UNISA). She holds a PhD degree in Environmental Engineering from Michigan Technological University. Her main research focus is in water and wastewater treatment using adsorption technique, development of nano-adsorbent material and waste biorefinery