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Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine
Thesis (PhD (Chemical Engineering))--University of Pretoria, 2024.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2024
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| _version_ | 1867613652568244224 |
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| access_status_str | Open Access |
| author2 | Tichapondwa, Shepherd Masimba |
| author_browse | Tichapondwa, Shepherd Masimba |
| author_facet | Tichapondwa, Shepherd Masimba |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD (Chemical Engineering))--University of Pretoria, 2024. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/100027 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:33.363Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/100027 Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine Tichapondwa, Shepherd Masimba tabana.ls@tuks.co.za Tabana, Lehlogonolo Shane UCTD Sustainable Development Goals (SDGs) Photocatalysis Surface plasmon resonance Antiretroviral therapy Adsorption Computational analysis Thesis (PhD (Chemical Engineering))--University of Pretoria, 2024. The global challenge of water contamination necessitates innovative approaches for wastewater treatment. This study explored modified layered double hydroxide (LDH)-based photocatalysts and adsorbents for removing persistent organic pollutants, focusing on antiretroviral drugs (ARVDs) such as efavirenz (EFV) and nevirapine (NVP). These drugs, commonly found in wastewater due to extensive use in HIV/AIDS treatment, resist conventional treatments and pose environmental and health risks. The synthesis and characterization of an Ag-AgBr-LDH photocatalyst revealed a promising combination of LDH’s durability and Ag-AgBr’s superior visible-light absorption. Techniques like X-ray diffraction, scanning electron microscopy, and BET surface area analysis confirmed the material's suitability. Photocatalytic evaluations showed significant degradation of phenol and ARVDs, with EFV and NVP achieving maximum degradation efficiencies of 84% and 100%, respectively. Response surface modeling identified critical interactions among factors such as initial pH, photocatalyst loading, and pollutant concentration. Continuous flow reactor tests highlighted optimal degradation at a photocatalyst loading of 3 g/L, a flow rate of 10 mL/min, and high light intensity. Parallel investigations assessed the adsorption potential of calcined LDH (CLDH). Characterization revealed rapid adsorption kinetics and physisorption as the dominant mechanism, with hydrogen bonding playing a significant role. National Research Foundation, Grant Number: MND200409512185 National Research Foundation, Grant Number: 117905 Chemical Engineering PhD (Chemical Engineering) Unrestricted Faculty of Engineering, Built Environment and Information Technology SDG-06: Clean water and sanitation 2024-12-13T13:05:18Z 2024-12-13T13:05:18Z 2025-04 2024-12-12 Thesis * A2025 http://hdl.handle.net/2263/100027 DOI: https://doi.org/10.25403/UPresearchdata.28014110.v1 https://doi.org/10.25403/UPresearchdata.28014110 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Sustainable Development Goals (SDGs) Photocatalysis Surface plasmon resonance Antiretroviral therapy Adsorption Computational analysis Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title | Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title_full | Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title_fullStr | Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title_full_unstemmed | Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title_short | Application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol, efavirenz, and nevirapine |
| title_sort | application of layered double hydroxides in advanced wastewater remediation processes for the removal of phenol efavirenz and nevirapine |
| topic | UCTD Sustainable Development Goals (SDGs) Photocatalysis Surface plasmon resonance Antiretroviral therapy Adsorption Computational analysis |
| url | http://hdl.handle.net/2263/100027 https://doi.org/10.25403/UPresearchdata.28014110 |