Prof Caliphs Zvinowanda

Zvinowanda CM, Okonkwo JO, Mpangela V, Phaleng J, Shabalala PN, Dennis T, Forbes P, Agyei NM,     Ozoemena KI, Biosorption of toxic metals: The potential of maize tassel for the removal of Pb(II) from aqueous solutions, Fresenius  Environ. Bulletin., 17 (7a), 814-818, 2008.

Zvinowanda CM, Okonkwo JO, Agyei NM, Shabalala PN, Preparation and characterization of biosorbents made from tassel, Canadian  J. Pure & Appl. Sci.,  2 (3), 483-488., 2008.

Zvinowanda CM, Okonkwo JO, Agyei NM, Saduki R, Application of maize tassel for the removal of Pb, Se, Sr, U and V from borehole water contaminated with mine wastewater in the presence of alkaline metals, J. Haz. Mat., 164, 884-891, 2009.

Zvinowanda CM, Okonkwo JO, Agyei NM, Shabalala PN, Physicochemical characterisation of maize tassel adsorbent: Part I. Surface texture, microstructure and thermal stability, J. Appl. Pol. Sci., 111(4), 1923-1930, 2009.

Forbes B.C.P, Thanjekwayo M,  Jonathan O. Okonkwo O.J, Sekhula M,  Zvinowanda C, Lichens as biomonitors for manganese and lead in Pretoria, South Africa, Fresenius  Environ.  Bulletin, 18 (5), 609-614, 2009.

Zvinowanda CM, Okonkwo, J.O., Agyei, N.M., Shabalala, P.N. A novel adsorbent for heavy metal remediation in aqueous environments, Inter.  J. Environ. Sci. Technol. Vol. 6 (3), 425-434, 2009

Sibali LL, Okonkwo JO, Zvinowanda CM. Determination of DDT and Metabolites in Surface Water   and sediment using LLE, SPE, ACE and SE, Bull. Environ.  Contam. Toxicol., vol 83, Issue 6, pp885-891, 2009

Caliphs M. Zvinowanda,  Jonathan O. Okonkwo,  Nana M. Agyei, Martin Van Staden, Werner Jordaan Boitumelo V. Kharebe. Recovery of  Lead(II) from Aqueous Solutions by Zea mays Tassel biosorption. American J. Biochem & Biotechnol.,  6(1): 1-10, 2010

Emmanuel Rotimi Sadiku, ER.;  Chacko A.;  Kekana LMK.;  Phiri G.; Okonkwo JO.; Zvinowanda CM.; Sekhula MM.;  Agyei NM. Mechanical and Rheological Characteristics of Micro-Particle Maize Tassel-Filled Polypropylene Micro-Composites, J. Mat. Sci. Eng. B 1 131-147, 2011

Mujuru M.; McCrindle RI.;  Gurira RC.; Zvinowanda CM.;  Maree J. Air Quality Monitoring in Metropolitan Harare, Zimbabwe, J Environ.  Analytic Toxicol., 2:3, 2012

Maree JP.; Zvinowanda CM.; Mujuru M.; Matsapola RM.; Delport DJ.; Wynand JL. Recovery of Calcium Carbonate from Wastewater Treatment Sludge Using a Flotation Technique, J. Chem. Eng. Process Technol, 3:2, 2012

Sekhula MM.; Okonkwo JO.; Zvinowanda CM.; Agyei NM.; Chaudhary AJ. Fixed bed Column Adsorption of Cu (II) onto Maize Tassel-PVA Beads, J Chem. Eng. Process Technol., 3:2, 2012

Rukuni, T T, Maree, J P and Zvinowanda, C M Carlsson FHH, The effect of temperature and pressure on the separation of calcium carbonate and barium sulphate from a mixed sludge, Inter. J. Chem.  Process Technol., 3:3 (137), 2012.

Rukuni, T T, Maree, J P and Zvinowanda, C M, Carlsson FHH, Separation of Magnesium hydroxide and barium sulphate from Barium sulphate-Magnesium hydroxide sludge by carbonation: The effect of temperature, Inter.  J.  Civil Environ. Engin. 2:116, 2012

Zvinowanda CM.; Mtombeni T.; Maree JP.; Zikalala NN.; Makgati JM.; Asante JKO. Oosthuizen FS.; Jessen H.; Louw WJ. Evaluation of the Performance of a new Freeze Desalination Technology – the HybridICE™, Int J Environ. Sci & Technol., 10 (3):545-550, 2013

Oluranti Agboola, Jannie Maree, Richard Mbaya, Andrei Kolesnikov, Jakob Johannes Schoeman and C. M Zvinowanda (2013), Flux Decline and Rejection Characteristics During Nanofiltration of Iron and Deionized Water. Journal of Computational and Theoretical Nanoscience , 10, 54-58, 2013.

A. Adeniyi1, J. P. Maree, R. K. K. Mbaya, A. P. I. Popoola, F. S. Oosthuizen, T. Mtombeni & C. M. Zvinowanda,    HybridICE® HIF filter: principle and operation,  WIT Transactions on Ecology and The Environment, Vol 171, doi:10.2495/WRM130231, 2013

A. Adeniyi, J. P. Maree, R. K. K. Mbaya, A. P. I. Popoola, T. Mtombeni &

C. M. Zvinowanda,. HybridICE® filter: ice separation in freeze desalination of mine waste waters, Water Science & Technology, vol.69 (9), pp 1820-1827, 2014

Agboola, O., Jannie Maree, J.,  Richard Mbaya, R., Caliphs Musa Zvinowanda, CM., Molelekwa, GF., Jullok, N., Bruggen, Bvd., Volodine, A.,  Haesendonck, Cv. Deposition of toxic metal particles on rough nanofiltration membranes, Korean J. Chem. Eng., vol.31, Issue 8, pp1413-1424, 2014.

Zvinowanda CM.; Mtombeni T.; Maree JP.; Zikalala NN.; Oosthuizen FS.; Louw WJ. Process optimization of freeze- desalination of brine using HybridICETM pilot plant.  J Desalination & Water Treatment, Vol.52, Issue 34-36, 2014.

Sheku Alfred Kanu, Mambo Moyo, Caliphs M. Zvinowanda & Jonathan O. Okonkwo :

Biosorption of Pb(II) from aqueous solution using Rooibos shoot powder (RSP), Desalination and Water Treatment,  DOI:10.1080/19443994.2015.1004116, 2015

A Adeniyi, RKK Mbaya, API Popoola, JP Maree, and CM Zvinowanda. Performance comparison of hydraulic and gravitation HybridICE filters in freeze desalination of mine waters, Water SA Vol. 41 No. 2 WISA 201, Special Edition 2015.

Conference Proceedings

T Mtombeni, J P Maree, J K O Asante, C M Zvinowanda, F Oosthuizen and WJ Louw – Harnessing refrigeration waste heat to achieve zero liquid discharge. The Water Institute of Southern Africa (WISA) Biennial Conference and Exhibition. Cape Town International Conference Centre, South Africa, 6-9 May 2012.

Zvinowanda, C M (2012), Rukuni, T T, Maree, J P, Keynote speaker: Technology development to solve acid mine drainage and environmental challenges in South Africa, Enviromin International Conference, Loskop dam, Middleburg, South Africa. 22-26 March 2012.

Masukume, M, Maree, J P, Joubert, H, Regina, M and Zvinowanda, C M (2012) Processing of alkali metal sulphide, WISA Biennial Conference, Cape Town International Conference Centre, 5 – 9 May.

M D Maila, J P Maree, L M Cele and C M Zvinowanda, Treatment of acid mine drainage using ammonium hydroxide, Water Institute of Southern Africa (WISA), 6-10 May 2012, South Africa (Cape Town). (poster)

Adeniyi, A, Maree, J P, Mbaya, R K K, Popoola, A P I, Oosthuizen, F S, Mtombeni,T, and Zvinowanda, C M (2012) HybridICE® HIF Filter: Principle and Operation, 4th  international Conference on Sustainable Irrigation and Drainage: Management, Technologies and Policies December 11 – 13, 2012 Adelaide, Australia. 11 – 13 December 2012.

Zvinowanda CM, Okonkwo JO, Gurira RC, Improved derivatisation methods for analyzing cyanide species in mine effluent, Environmin 2007, Bakgatla Resort, Pilanesberg, SA, 22-26 July 2007.

Zvinowanda CM, Okonkwo JO, Agyei NM, Development and application of agriculture waste materials in the removal of toxic metals from water and wastewater, UNESCO Hydrology for Environment Life and Policy (HELP) Southern Symposium, Emperors Palace, Johannesburg, SA, 4-9 Nov. 2007.

Zvinowanda CM, Okonkwo JO, Agyei NM, Removal of Se and Sr from contaminated water by tassel powder, Royal Society of South Africa (RSSAf) Centenary Congress, SA, 17&18 April 2008.

JP Maree, V Bologo, CM Zvinowanda, Treatment of Acid Mine Drainage using Magnesium Hydroxide, , Conference Proceeding Paper, International Mine Water Conference, CSIR International Convention Centre, Pretoria, SA, 19-23  October 2009.

Zvinowanda CM, Okonkwo JO, Agyei NM, Removal of Se and Sr from contaminated water by tassel powder, Conference Proceedings Paper, WISA biennial Conference, Sun City, SA, 19-22 May 2008.

Zvinowanda CM, Okonkwo JO, Agyei NM, Application of tassel in the   remediation of ground water contaminated by U, Pb and V, 36th  International Association of Hydrogeologists (IAH) Congress, Toyama City, Japan, 26 October-1 November 2008

Zvinowanda CM, Okonkwo JO, Agyei NM, Van Staden M, Jordaan W, Kharebe BV, Recovery of lead(II) from aqueous solutions by Zeas Mays tassel biosorption 2nd International Conference of Ecotoxicology & Environmental Sciences (ICEES-2009), Jadapur University, Kolkata, India, 14-18 December 2009.

Sekhula MM, Zvinowanda CM, Okonkwo JO, Agyei NM, Application of maize tassel for the removal of Cu(II) from synthetic wastewater, Conference Proceedings Paper, WISA biennial Conference, Durban, SA, 18-22 April 2010.

Mtombeni T, CM Zvinowanda, Maree JP, Oosthuizen FS, Louw WJ, Treatment of Acid Mine Drainage using Magnesium Hydroxide, Conference Proceedings Paper, WISA biennial Conference, Durban, SA, 18-22 April 2010.

Zvinowanda, C. 2011. Thermal conversion of gypsum to calcium sulphide in a graphite tube based rotary kiln, Conference Proceedings of 43rd IUPAC World Chemistry Congress, 30 July-7 August 2011, Puerto Rico Convention Center, San Juan, Puerto Rico

Zvinowanda C., Maree, J., 2011. Cost-effective Neutralization and    desalination of mine water, Critical Thinkers Forum – Acid Mine Drainage: Possible Solutions, National Science and Technology Forum (NSTF), 21 July 2011, Birchwood Hotel, Boksburg

Mtombeni, T, Maree J P, Zvinowanda C M, Asante J K O and Louw W J (2014) Improved freeze desalination process for recovery of water and salts from brines, Proceedings of the 2014 WISA Biennial Conference, Mbombela, 25-29 May

Book Chapter

Strategic Planning and Sustainable Management of Acid Mine Drainage in the Wits Gold Fields, 2016 (HSRC-In press).