Authors:
Bankole, S. O*, Alao, D.O, Ariwoola, O.S, Osunlaja, O.A., Oladejo, S.F, and
Chukwudebe Eccepacem |
Abstract:
This study investigated the heavy metals status in the barks of Azadiractha indica and soil
samples collected from four selected major roads with control far away from major roads in
Ibadan. Heavy metals in barks were determined after digestion using Atomic Absorption
Spectrophotometer (AAS).Bark metal concentration (mg/kg) from the sites ranged from: Pb
(3.00 - 66.50), Cd (0.50 - 37.00), Cu (1.50 - 8.00), Zn (6.40 - 810.50), Fe (61.00 - 906.00). The
heavy metal level in control sample was far lower than those found at other sites suggesting
environmental contamination within the study locations. Pb was found to be higher than
FAO/WHO maximum limits in all sampled site except in the control site, Cd and Cu was found
below limit in all sites, Zn was found below limit in all sites except in site E and Fe was found
above FAO/WHO maximum limit in all sites except in site A and D.
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