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Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus
Dissertation (MEng (Chemical Engineering))--University of Pretoria, 2021.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2022
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| _version_ | 1867613660804808704 |
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| access_status_str | Open Access |
| author2 | Brink, Hendrik Gideon |
| author_browse | Brink, Hendrik Gideon |
| author_facet | Brink, Hendrik Gideon |
| collection | Thesis |
| dc_rights_str_mv | © 2019 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 | Dissertation (MEng (Chemical Engineering))--University of Pretoria, 2021. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/83420 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:41.079Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| 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:2263/83420 Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus Brink, Hendrik Gideon u26026946@tuks.co.za De Wet, Maria Martha Marthina UCTD Adsorption capabilities Aspergillus piperis Lead biosorption Larger mycoremediation corpus Dissertation (MEng (Chemical Engineering))--University of Pretoria, 2021. The Pb(II) adsorption capabilities of a heavy metal tolerant strain of fungus, Aspergillus piperis, were studied. Agar well diffusion was used with 2000 ppm of Cu(II), Fe(II), Pb(II), Mg(II), Mn(VI), Se(VI), Cd(II), and Zn(II) ions. Of the metals tested, A. piperis only exhibited substantial growth inhibition in Cd(II), while lesser inhibition was ob- served in Se(IV), Pb(II), and Zn(II). After five days the fungus had successfully grown in the presence of all the other metals. Optimal growth conditions were identified using a plating technique, and optimal adsorption conditions were identified using submerged fermentation and fractional factorial experimental design. The adsorption behaviour was then elucidated using isotherm and kinetic models, of which the one-surface Langmuir isotherm provided the best fit. The Langmuir maximum predicted adsorption capacity was 275.82 mg g-1, which is similar to the experimental Qmax of 267.41 mg g-1. Both these values are high when compared to other fungi tested for Pb(II) adsorption. Kinetic models suggested that internal mass transfer is the driving force behind the reaction rate. After adsorption, biomass surface characterisation was undertaken using ATR-FESEM, EDS, and FTIR suggesting that cation exchange is the underlying adsorption mechanism. The good adsorption performance as well as the relative ease in which this biomass can be manufactured indicate that A. piperis would be an excellent candidate for industrial Pb(II)-remediation. The National Research Foundation of South Africa (Grant Number: 121891) Chemical Engineering MEng (Chemical Engineering) Unrestricted 2022-01-21T19:14:36Z 2022-01-21T19:14:36Z 2022 2021 Dissertation * A2022 http://hdl.handle.net/2263/83420 en © 2019 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 Adsorption capabilities Aspergillus piperis Lead biosorption Larger mycoremediation corpus Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title | Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title_full | Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title_fullStr | Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title_full_unstemmed | Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title_short | Lead biosorption characterisation of Aspergillus piperis : contextualising the novel fungus within the larger mycoremediation corpus |
| title_sort | lead biosorption characterisation of aspergillus piperis contextualising the novel fungus within the larger mycoremediation corpus |
| topic | UCTD Adsorption capabilities Aspergillus piperis Lead biosorption Larger mycoremediation corpus |
| url | http://hdl.handle.net/2263/83420 |