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Cledwyn Mangunda

An Investigation into the Kinetics and Mechanisms of Fe (III) Oxyhydroxides Precipitation in Lime Neutralization Processes

Qualifications

2007 BEng (Hons) Chemical Engineering (NUST)
2010 MEng Chemical Engineering (NUST)
2014 PGD Higher Education (NUST)


Project Description

Acid Mine Drainage (AMD) and hydrometallurgical wastewater are products of metallurgical activities that pose environmental risks as they contain heavy metals. The abundance of Fe in these waste streams and its notorious tendency to precipitate as a sludge has drawn attention to the mechanisms and kinetics of Fe (III) oxyhydroxide precipitation. The lack of a process which meets the effluent discharge limits whilst also producing a sludge-free precipitate that is amenable to metal value recovery has resulted in downstream challenges in terms of sludge disposal in landfills and the significant loss of water associated with this practice. In this study, the mechanisms and kinetics of Fe (III) oxyhydroxide precipitation will be investigated using lime.


Publications

Kuipa, O., Kuipa, P.K., Mangunda, C.T., and Mwanza, W., 2015. Evaluation of Zimbabwean Katondo clay as a coagulant aid for treating low turbidity surface water with alum. International Journal of Chemical and Environmental Engineering, 6 (4), 219-222.

Kuipa, P.K., Mangunda, C.T., Kuipa, O. and Chawatama, A., 2015. Use of Pulverised Fuel Ash in the Manufacture of Concrete Roofing Tiles. . International Journal of ChemTech Research, 8(3), 1019-1025.

Mangunda, C.T., Kuipa, O., Sithole, T.R. and Kuipa, P.K., 2014. Recovery of lead from lead laden cupels by a simultaneous leaching and electrowinning process in a methanesulphonic acid bath. International Journal of ChemTech Research, 6 (4), 2404-2413.