Pb and Zn contamination in Zoar Vlei, Cape Peninsula

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dc.contributor.advisorFey, Martin Ven_ZA
dc.contributor.advisorWillis, Jamesen_ZA
dc.contributor.authorReid, Caroline Emmaen_ZA
dc.date.accessioned2016-08-24T12:53:44Z
dc.date.available2016-08-24T12:53:44Z
dc.date.issued1995en_ZA
dc.descriptionBibliography: pages 73-77.en_ZA
dc.description.abstractThe sediments in Zoar Vlei act as a considerable sink for Pb and Zn derived from the adjacent Paarden-Eiland semi-industrial area and the Milnenon-Rugby residential area. Through elemental analysis of 34 sediment samples by WDXRF spectroscopy, the sediments were shown to be significantly enriched in Pb and Zn.Lead and Zn concentrations are highest at the entrance to the southern pan, and decrease nonhwards through the vlei system. Kaolinite, quanz, illite and smectite are present in the clay fraction of the sediment, as was shown by analysis of a clay separate by XRD. The results of the sorption experiments revealed that both Pb and Zn are sorbed by the sediments. The selective affinity of the sediments for Pb exceeds that for Zn, as Pb sorption was shown to displace Zn from (he sediment while Zn sorption did not induce Pb release. The high degree of irreversibility of both Pb and Zn sorption indicates that sorption is specific in nature, and that under the present environmental conditions, the sediments act as a suitable storage facility for these metals. Acidification of the vlei water in equilibrium with the sediments caused Zn release through neutralisation reactions. Total water analyses were performed on 72 vlei water samples using high performance ion liquid chromatography and ICP-AES. Zinc concentrations in the vlei were elevated compared to natural background values, and decrease in a northerly direction through the vlei system, however remain elevated at the outflow into the Milnerton Lagoon. Zinc appears to be entering the vlei via storm water drains from both the industrial and residential areas.en_ZA
dc.identifier.apacitationReid, C. E. (1995). <i>Pb and Zn contamination in Zoar Vlei, Cape Peninsula</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/21495en_ZA
dc.identifier.chicagocitationReid, Caroline Emma. <i>"Pb and Zn contamination in Zoar Vlei, Cape Peninsula."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1995. http://hdl.handle.net/11427/21495en_ZA
dc.identifier.citationReid, C. 1995. Pb and Zn contamination in Zoar Vlei, Cape Peninsula. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Reid, Caroline Emma AB - The sediments in Zoar Vlei act as a considerable sink for Pb and Zn derived from the adjacent Paarden-Eiland semi-industrial area and the Milnenon-Rugby residential area. Through elemental analysis of 34 sediment samples by WDXRF spectroscopy, the sediments were shown to be significantly enriched in Pb and Zn.Lead and Zn concentrations are highest at the entrance to the southern pan, and decrease nonhwards through the vlei system. Kaolinite, quanz, illite and smectite are present in the clay fraction of the sediment, as was shown by analysis of a clay separate by XRD. The results of the sorption experiments revealed that both Pb and Zn are sorbed by the sediments. The selective affinity of the sediments for Pb exceeds that for Zn, as Pb sorption was shown to displace Zn from (he sediment while Zn sorption did not induce Pb release. The high degree of irreversibility of both Pb and Zn sorption indicates that sorption is specific in nature, and that under the present environmental conditions, the sediments act as a suitable storage facility for these metals. Acidification of the vlei water in equilibrium with the sediments caused Zn release through neutralisation reactions. Total water analyses were performed on 72 vlei water samples using high performance ion liquid chromatography and ICP-AES. Zinc concentrations in the vlei were elevated compared to natural background values, and decrease in a northerly direction through the vlei system, however remain elevated at the outflow into the Milnerton Lagoon. Zinc appears to be entering the vlei via storm water drains from both the industrial and residential areas. DA - 1995 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1995 T1 - Pb and Zn contamination in Zoar Vlei, Cape Peninsula TI - Pb and Zn contamination in Zoar Vlei, Cape Peninsula UR - http://hdl.handle.net/11427/21495 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21495
dc.identifier.vancouvercitationReid CE. Pb and Zn contamination in Zoar Vlei, Cape Peninsula. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1995 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21495en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Geological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherGeological Scienceen_ZA
dc.titlePb and Zn contamination in Zoar Vlei, Cape Peninsulaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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