Please use this identifier to cite or link to this item:
https://etd.cput.ac.za/handle/20.500.11838/2811
Title: | Organic binder mediated Co3O4/TiO2 heterojunction formation for heterogeneous activation of Peroxymonosulfate | Authors: | Kapinga, Sarah Kasangana | Keywords: | Sewage -- Purification -- Oxidation;Heterogeneous catalysis;Water -- Purification -- Oxidation;Water reuse | Issue Date: | 2019 | Publisher: | Cape Peninsula University of Technology | Abstract: | A shortage of water has resulted in the need to enhance the quality of wastewater that is released into the environment. The advanced oxidation process (AOP) using heterogeneous catalysis is a promising treatment process for the management of wastewater containing recalcitrant pollutants as compared to conventional processes. As AOP is a reliable wastewater treatment process, it is expected to be a sustainable answer to the shortage of clean water. AOP using heterogeneous catalysis based on Co3O4 particles and PMS, in particular has been found to be a powerful procedure for the degradation and mineralization of recalcitrant organic contaminants. In addition, due to the growing application of Co3O4 in lithium batteries, large quantities of these particles will be recovered as waste from spent lithium batteries, so there is a need to find a use for them. Although this method has received some promising feedback, challenges still need to be addressed, such as the toxicity of cobalt particles, the poor chemical and thermal stability and particle aggregation, and the prompting of lower catalytic efficiency in long haul application. Furthermore, the removal of the catalyst after the treatment of pollutants is also an issue. In order to be applicable, a novel catalyst must be produced requiring the combination of Co3O4 with a support material in order to inhibit cobalt leaching and generate better particle stability. From the available literature, TiO2 was found to be the best support material because it not only provides a large surface area for well dispersed Co3O4, but it also forms strong Co-O-Ti bonds which greatly reduced cobalt leaching as compared to other support materials. Moreover, it also greatly encourages the formation of surface Co–OH complexes, which is considered a crucial step for PMS activation. Therefore, the issues cited above could be avoided by producing a Co3O4/TiO2 heterojunction catalyst. | Description: | Thesis (MEng (Chemical Engineering))--Cape Peninsula University of Technology, 2019. | URI: | http://hdl.handle.net/20.500.11838/2811 |
Appears in Collections: | Chemical Engineering - Masters Degrees |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
211016292-Kapinga-Sarah-Kasangana-MEng-Chemical-Engineering-Eng-2019.pdf | Thesis | 4 MB | Adobe PDF | ![]() View/Open |
Page view(s)
2,749
Last Week
2,749
2,749
Last month
2,749
2,749
checked on Feb 16, 2022
Download(s)
369
checked on Feb 16, 2022
Google ScholarTM
Check
This item is licensed under a Creative Commons License