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Vol.2 , No. 6, Publication Date: Dec. 17, 2015, Page: 100-108
. Results showed that total extractable metals were significantly higher (P < 0.05) in the dumpsites compared to control site. Results of speciation indicated that Mn, Fe, Zn, Pb, Cd and Ni had more than 70% non-residual fractions. The mean order of mobility and bioavailability of the metals were: Mn > Fe > Zn > Cd > Pb > Cr > Ni > Cu in the sites. Total mean metal concentration in <i>Amaranthus hybridus</i>, <i>Telfeleria occidentalis</i>, <i>Talinum triangulare</i>, and <i>Ipomea batatas</i> were significantly higher (P < 0.05) in the dumpsites samples compared to control site. The different plants’ metals absorption and translocation indices varied and indicated that the plants have varied potentials for phytoextraction and phytostabilization of the metals. The health risks implications of the results were discussed based on established regulatory standards.&picture=http://www.aascit.org/aascit/decorators/img/journal/924.jpg)
| [1] | N. A. Obasi, Department of Medical Biochemistry, Federal University Ndufu-Alike, Ikwo-Ebonyi State, Nigeria; Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana-Ebonyi State, Nigeria. |
| [2] | S. E. Obasi, Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana-Ebonyi State, Nigeria. |
| [3] | R. I. Igbolekwu, Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana-Ebonyi State, Nigeria. |
| [4] | J. O. Nkama, Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana-Ebonyi State, Nigeria. |
| [5] | S. O. Eluu, Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic Unwana-Ebonyi State, Nigeria. |
This study investigated the uptake of heavy metals by edible plants cultivated around Eluogo and Agboogo Ibii dumpsites in Ibii, Afikpo North, Ebonyi State, Nigeria using standard protocols. The mobile and lethal fractions of the total metals in the dumpsites soils in the plants’ ecosystem were also investigated. The samples were obtained from the vicinity of Eluogo and Agboogo Ibii dumpsites in Ibii and a nearby farm land (control site). Results showed that total extractable metals were significantly higher (P < 0.05) in the dumpsites compared to control site. Results of speciation indicated that Mn, Fe, Zn, Pb, Cd and Ni had more than 70% non-residual fractions. The mean order of mobility and bioavailability of the metals were: Mn > Fe > Zn > Cd > Pb > Cr > Ni > Cu in the sites. Total mean metal concentration in Amaranthus hybridus, Telfeleria occidentalis, Talinum triangulare, and Ipomea batatas were significantly higher (P < 0.05) in the dumpsites samples compared to control site. The different plants’ metals absorption and translocation indices varied and indicated that the plants have varied potentials for phytoextraction and phytostabilization of the metals. The health risks implications of the results were discussed based on established regulatory standards.
Keywords
Metal, Bioaccumulation, Human Health, Risk Assessment, Ibii
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