Dr Zikhona Tywabi-Ngeva

Position: Lecturer – Physical Chemistry

Department: Chemistry

Room: 0003

Floor: Ground

Building: 13

Campus: South 

Phone: 041 504 4320

Fax: 041 504 4236

Email: Zikhona.tywabi-ngeva@mandela.ac.za

Qualifications: PHD Chemistry


Research Interests

Extraction and Isolation of nanocellulose from biomass for different applications (biomedical, fuel cells, renewable energy and water treatment)

Thermodynamics properties of ionic liquid mixtures and their correlation, Separation Technology, Extraction Techniques, Computational Chemistry


Representative publications and scholarly works


Google scholar



  • Post Graduate Diploma, Higher Education, 2021
  • PhD, Chemistry, 2015
  • MTech Chemistry (cum laude), 2012
  • BTech, Chemistry, 2010


Currently Teaching

GHGV101 - General Chemistry

CHPV200 - Physical Chemistry        

CHP2012 - Physical Chemistry                       

CHA420 - Chromatography (8 lectures)

CHP420 - Material Science (9 lectures)


Selected Publications

  • Z. Tywabi, N. Deenadayalu, I. Bahadur and T. Hofman.  J. Chemical Thermodynamics 2012, Volume 49, pages 24-38.Volumetric properties of ternary (IL + 2-propanol or 1-butanol or 2-butanol + ethyl acetate) systems and binary (IL + 2-propanol or 1-butanol or 2-butanol) and (1-butanol or 2-butanol + ethyl acetate) systems.
  • Z. Tywabi, N. Deenadayalu, B. Sithole. Journal of Scientific & Industrial Research Vol. 76, March 2017, pp. 160-172. Dissolution of South African Eucalyptus Sawdust Wood in [Emim][OAc]/Co-Solvent Mixtures.
  • Z. Tywabi, N. Deenadayalu, B. Sithole. Journal of Scientific & Industrial Research Vol. 76, September 2017, pp. 540-544. Study of Cellulose-Rich Materials Recovered After Dissolution of Sulphite Pulp from South African Eucalyptus Wood in [C2mim][OAc]/co-Solvent Mixtures.
  • Segun Daniel Oladipo, Tunde Lewis Yusuf, Sizwe Joshua Zamisa, Gideon Femi Tolufashe, Kolawole Ayodapo Olofinsan, Zikhona Tywabi-Ngeva and Nonhlangabezo Mabuba. European Journal of Chemistry, June 2021, 12 (2), 204-215.  Synthesis, crystal structure with free radical scavenging activity and theoretical studies of Schiff bases derived from 1-naphthylamine, 2,6-diisopropylaniline, and substituted benzaldehyde.
  • Soon Woong Chang, Murugesan Chandrasekaran, Zikhona Tywabi-Ngeva, Pandi Boomi, S Ravikumar, Mohd Shahbaaz Shahbaaz, Magda H Abdellattif, M Razia. Research Square, April 2021, DOI: 10.21203/rs.3.rs-467364/v1.  Bio-Inspired Fabrication of Silver Nanoparticles Using High Altitude Squamulose Lichen Extract and Evaluation of its Antioxidant, Anticandida and Cytotoxic properties.