The Role of pH in Heavy Metal Detoxification by Bio-sorption from Aqueous Solutions Containing Chelating Agents

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dc.contributor.authorIgwe, J.C.
dc.contributor.authorNwokennaya, E.C.
dc.contributor.authorAbia, A.A.
dc.date.accessioned2014-05-17T10:46:11Z
dc.date.available2014-05-17T10:46:11Z
dc.date.issued2005-10
dc.description.abstractThe high level of toxic metal pollution in the environment is a result of increased human activities. The hydrogen ion concentration of solutions has been known to affect reactions in solutions. The role of pH in As(V), Pb(II) and Hg(II) ions detoxification by bio-sorption from aqueous solutions using coconut fiber and sawdust waste biomass, containing chelating agents was studied. pH characteristically influenced adsorption. Maximum adsorption occurred at pH 2 and 12 whereas minimum adsorption occurred at pH 6-8. Modification of the adsorbent by carboxymethylation and thiolation decreased the absorption capacity. As(V) metal ion was adsorbed more than Hg(II), then followed by Pb(II) ion. A model was proposed for the action of pH on the adsorption pattern of the metal ions on the adsorbents used. Desorption studies was investigated using NaOH and H2PO4. Therefore, these results can serve as parameters for design of treatment plants for heavy metal detoxification using agricultural by-products, such as sawdust and coconut fiber.en_US
dc.identifier.citationAfrican Journal of Biotechnology Vol.: 4, No.: 10, October 2005 [Page 1109-1112]en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1439
dc.language.isoenen_US
dc.publisherAcademic Journalsen_US
dc.subjectpHen_US
dc.subjectheavy metalen_US
dc.subjectbio-sorptionen_US
dc.subjectadsorbentsen_US
dc.subjectdetoxificationen_US
dc.titleThe Role of pH in Heavy Metal Detoxification by Bio-sorption from Aqueous Solutions Containing Chelating Agentsen_US
dc.typeArticleen_US

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