Apua, Momboyo Clotilde2021-11-292021-11-292021https://hdl.handle.net/10539/32186A thesis submitted in fulfillment of the requirements for the degree of Doctor of Philosophy to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, 2020The study focused on the synthesis of a composite coagulant containing polymeric sulphates of Fe, Al, Si, Mg, and Ca from coal fly ash (CFA).enThesis