Remediation of soil and water contaminated by heavy metals and hydrocarbons using silica encapsulation

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dc.contributor.author Mbhele, Phelelani Phetheni
dc.date.accessioned 2008-10-27T07:34:26Z
dc.date.available 2008-10-27T07:34:26Z
dc.date.issued 2008-10-27T07:34:26Z
dc.identifier.uri http://hdl.handle.net/10539/5818
dc.description.abstract Heavy metals and hydrocarbons are persistent pollutants in the environment. Problems associated with the cleanup of sites contaminated by metals and hydrocarbons have demonstrated the need to develop remediation technologies that are feasible, quick, and effective in a wide range of physical settings. Experiments were conducted to investigate the efficiency of silica encapsulation and the factors that influence its performance. Analysis was done by ICP-OES and GC-FID for metals and hydrocarbons respectively. This technology was tested using sodium silicate and ChemcapTM. Soils and water contaminated with hydrocarbons and heavy metals were successfully remediated by silica encapsulation. The silica coating was stable under both acidic and alkaline conditions. A new product that is based on sodium silicate formulation was developed and was more effective at encapsulating hydrocarbons and heavy metals. Laboratory tests indicated that it is more effective in an acidic medium and it continues to strengthen with time. Metal encapsulation was affected by the sizes of metal ions and the presence of hydrocarbons. en
dc.language.iso en en
dc.subject soil and water en
dc.subject silica encapsulation en
dc.subject heavy metals en
dc.subject hydrocarbons en
dc.title Remediation of soil and water contaminated by heavy metals and hydrocarbons using silica encapsulation en
dc.type Thesis en


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