Prof JP Maree

Neutralization, Desalination, Brine treatment, Product recovery

• Neutralisation of acid water with various alkalis (e.g. limestone, dolomite, lime, caustic soda).
• Treatment of sulphate-rich water with biological and chemical processes (e.g. Biological sulphate removal process, Barium sulphide process and Gypsum crystallisation process).
• Modelling of industrial water treatment systems.
• Recovery of potential by-products from the above-mentioned processes (e.g. gypsum, CO₂-gas, sulphur and high quality CaCO₃.)
• Manganese and iron removal from water polluted by mining effluent.

Book Chapters

• M. Mogashane, J. P. Maree, M. Mujuru and M. M. Mphahlele-Makgwane, “Technologies that can be Used for the Treatment of Wastewater and Brine for the Recovery of Drinking Water and Saleable Products,” in Recovery of Byproducts from Acid Mine Drainage Treatment, Editors: Elvis Fosso-Kankeu, Jo Burgess and Christian Wolkersdorfer, New York, Wiley Scrivener, 2020, pp. 97-156. doi:10.1002/9781119620204.ch5.
• Tumelo Monty Mogashane, Johannes Philippus Maree, Leny Letjiane, Vhahangwele Masindi, Kwena Desmond Modibane, Munyaradzi Mujuru, Mabel Mamasegare Mphahlele-Makgwane. Recovery of drinking water and nano-sized Fe2O3 pigment from iron rich acid mine water. Elvis Fosso-Kankeu, Martin Mkandawire and Bhekie Mamba (eds.) Application of Nanotechnology in Mining Processes: Beneficiation and Sustainability, (237–288) © 2022 Scrivener Publishing LLC.
• Conny P Mokgohloa, Johannes P Maree, David S van Vuuren, Kwena D Modibane, Munyaradzi Mujuru, Malose Mokhonoana, “Recovery of Na2CO3 and nano CaCO3 from Na2SO4 and CaSO4 wastes,” in Application of Nanotechnology in Mining Processes: Beneficiation and Sustainability, Editors: Elvis Fosso-Kankeu, Martin Mkandawire and Bhekie Mamba, New York, Wiley Scrivener, 2022, pp. 197 - 235 , ISBN:9781119865360, doi: https://doi.org/10.1002/9781119865360.ch6

• Elvis Fosso-Kankeu, Vhahangwele Masindi, Johannes Maree, Bhekie B Mamba, Thabo TI Nkambule 2022 Effective Attenuation of AMD Pollution Potential Using By-product from Municipal Wastewater Treatment, IMWA 243-249
• AL Tau, JP Maree, A Adeniyi and MS Onyango (2022) Treatment of Flue Gas Desulphurisation effluent with Freeze Crystallization, International Institute of Biological Chemical and Environmental Engineering (IICBEE), Johannesburg, South Africa, Nov. 28-29, ISBN: 978-989-9121-14-0, https://doi/10.17758/IICBE4.C1122223, p60-75.
• Mogashane, T.M.; Maree, J.P.; Mujuru, M.; Mphahlele-Makgwane, M.M.; Modibane, K.D. Ferric 2023, Hydroxide Recovery from Iron-Rich Acid Mine Water with Calcium Carbonate and a Gypsum Scale Inhibitor. Minerals, 13, 167-190. https://doi.org/10.3390/min13020167
• AL Tau, JP Maree, SL Letjiane, A Adeniyi and MS Onyango, 2023 Pigment Recovered from Iron Rich Mine Water for use in Coloured Concrete, 36th KUALA LUMPUR International Conference on “Chemical, Biological, Environmental & Natural Resources” (CBENR-23May 31-June 2, URUAE Kuala Lumpur (Malaysia)

Patents

• Pipe Freeze Crystallization - J P Maree (2018) Pipe Freeze Crystallization, ROC Water Technologies, Provisional Application No: 2018/04084, RSA No: 2019/03795 (25/08/21), Australia No: 201204324 (pending), Canada No: 3,092,764 (pending), USA No: 17,027,873 (pending).
• ROC process - T Mtombeni and J P Maree (2014) Treatment of water – ROC process, ROC Water Technologies, RSA (No 2015/04639), Germany (No 3452414), France (No 3452414), Australia (No 2016405754 – Pending), USA No 16/099,009)

• Registered professional scientist.
• Senior Fellow of The Water Institute of SA (WISA).
• Past Chairman of Vaal River Catchment Organization (VAALCO).

ORCHID link: https://orcid.org/0000-0002-8901-2512