Relationship between Metal levels in Dust Particulates and Tissues of Residents Living close to Dumpsite in Zaria Metropolis, Nigeria
Relationship between Metal levels in Dust Particulates and Tissues of Residents Living close to Dumpsite in Zaria Metropolis, Nigeria
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Date
2013-05
Authors
Uzairu, Adamu
Uba, Sani
M. S. Sallau,
Abba, Hamza
Okunola, Oluwole Joshua
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Abstract
The present study evaluate the relationship between the level of some metals in the particulate
dust, and blood, urine, nails and hair of human exposed to metals contamination due to the dumpsites
located within their residential areas. The concentrations of Zn, Pb Cu Cd and Hg are determined by
Varian AA240FS Atomic Absorption Spectrometry. The results obtained revealed differences significant at
p < 0.05 in levels of metals in dust samples across the seasons. Overall, the order of the bioavailability of
these metals in the near the dumpsites followed the pattern: Cd > Zn > Pb > Hg > Cu; Hg> Zu. Cd> Cu>
Pb and Zn> Hg> Cd > Pb > Cu for the dust nails and hair samples. The trend followed for the average
concentrations of these metals across the sites followed the same pattern in both the urine and blood
samples. Hg > Zn > Pb > Cd > Cu. The bioavailability of these metals some 300m away from the
dumpsites revealed different distribution patterns Zn> Hg> Cd> Pb> Cu; Hg> Pb> Zn> Cu> Cd; Hg>
Zn> Cd>Cu> Pb; ITg> Zn> Cd> Pb> Cu and Zn Cd> Cd> Pb=Hg for the dust Urine, blood, nails and hair
samples respectively. The concentrations of the metals in the tissues of the residents in the dumpsites areas
were higher than those recorded 300m away from the dumpsites (control sites). Moreover, one of the toxic
metals, mercury was not even recorded in the tissues of the control site residents in the wet season, a clear
indication of the level of pollution caused by the dumpsites.
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Keywords
Dumpsites,, human tissues,, dust,, toxicity,, heavy metals