Speciation of Heavy Metals Contaminants at Dumpsites by Improved Sequential Fractionation Technique

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dc.contributor.authorAjiboso, T.O.
dc.contributor.authorOlayinka, K.O.
dc.contributor.authorAlo, B.I.
dc.date.accessioned2019-09-03T14:09:41Z
dc.date.available2019-09-03T14:09:41Z
dc.date.issued2003
dc.descriptionStaff publicationsen_US
dc.description.abstractSpeciation of trace metal contaminants in soils was investigated by the improved sequential extraction techniques. Soil samples from some metal dumpsites in Lagos were sequentially extracted so that the heavy metals, cadmium, lead, nickel and zinc could be partitioned into five operationally defined chemical fractions: exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and residual. The significance of the analytical results depends on the extraction technique utilised. This work reports an improved sequential extraction technique (SET) for the determination of heavy metal forms in polluted soils. Concentrations of the metal contents in the soil ranged from cadmium 0.0-17.0 mg/kg, lead 13.0-16.562 mg/kg, nickel 5.0-140.5 mg/kg and zinc 28.0-18.994 mg/kg. Soil characteristics, pH and cation exchange capacity did not influence the partitioning of the heavy metals in any consistent manner. The highest percentages of nickel and cadmium were found in the residual and Fe/Mn oxide fractions 53.5% and 41% respectively. For lead and zinc, the highest percentages were found in the Fe-Mn oxide fractions, 47.5% and 40.3% respectively. Lead was the only metal significantly associated with the organic fraction.en_US
dc.identifier.citationAjiboso,T.O, Olayinka, K.O and Alo, B.I (2003). Speciation of Heavy Metals Contaminants at Dumpsites by Improved Sequential Fractionation Technique, Journal of Nigerian Environmental Society, Vol.1, 178-186pp.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5105
dc.language.isoenen_US
dc.publisherNigerian Environmental Society (NES)en_US
dc.subjectSpeciationen_US
dc.subjectHeavy metalsen_US
dc.subjectsoil contaminantsen_US
dc.subjectDump sitesen_US
dc.subjectsequential extraction techniquesen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES::Chemistryen_US
dc.titleSpeciation of Heavy Metals Contaminants at Dumpsites by Improved Sequential Fractionation Techniqueen_US
dc.typeArticleen_US
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