Fate and Mobility of Copper in Soil of Cocoa Plantations in two South-Western States of Nigeria treated with Copper-Based Fungicides. Soil and Sediment Contamination

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dc.contributor.authorOlu-owolabi, B.I.
dc.contributor.authorAgunbiade, F.O.
dc.contributor.authorAdebowale, K.O.
dc.contributor.authorOgunleye, I.O.
dc.date.accessioned2019-09-17T14:17:04Z
dc.date.available2019-09-17T14:17:04Z
dc.date.issued2012
dc.descriptionStaff publicationsen_US
dc.description.abstractSoils from cocoa plantations treated with Boudreaux mixture in two southwestern states of Nigeria were collected at different depths, 0–15 cm and 15–30 cm, and subjected to five-stage sequential extraction to obtain the speciation forms of copper: exchangeable, carbonate, manganese and iron oxides, organic and residual fractions. The Cu content in the extracts from the sequential extraction was read with an Atomic Absorption Spectrophotometer (AAS). The total Cu content of the soil and the physicochemical parameters of the soils were also determined. The results from the study showed that the soils had high organic matter and copper is mostly bounded to the more mobile exogenic phase much more than the stable lithogenic phase, indicating higher mobility. Within the exogenic species, carbonate fraction was the highest followed by the organic bound and the exchangeable fraction in decreasing order. Cu was not detected in the Fe/Mn bound fraction. The implication is that the fate of the administered Cu-based pesticide is more in the relatively stable carbonate bound species than the other, more mobile phase. The results showed variation in the distribution of the copper species from one depth to another. The most transported metal from the surface to the lower layer is the exchangeable fraction. The carbonate bound species is less mobile and is not readily transported into the bottom soil layer. The organic bound Cu has nearly equal distribution between the top and bottom soils and there was little or no transport of the residual metal specie from the top to the bottom. The existence of copper in the soil largely in the anthropogenic (exogenous) phase is not the most desirable for the ecosystem. This may increase the availability of Cu in the cocoa plant and bean and may lead to potential exposure risk.en_US
dc.identifier.citationOlu-Owolabi, B. I., Agunbiade, F. O., Ogunleye, I. O., & Adebowale, K. O. (2012). Fate and mobility of copper in soil of cocoa plantations in two southwestern states of Nigeria treated with copper-based fungicides. Soil and Sediment Contamination: An International Journal, Vol.21(8), 918-936pp.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5670
dc.language.isoenen_US
dc.publisherTaylor and Francisen_US
dc.relation.ispartofseriesAn International Journal;Vol.21(8)
dc.subjectCu speciationen_US
dc.subjectfungicideen_US
dc.subjectcocoa plantationen_US
dc.subjectsoilen_US
dc.subjectexogenicen_US
dc.subjectlithogenicen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCESen_US
dc.titleFate and Mobility of Copper in Soil of Cocoa Plantations in two South-Western States of Nigeria treated with Copper-Based Fungicides. Soil and Sediment Contaminationen_US
dc.typeArticleen_US
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