POLLUTANTS IN AIR AND HEAVY METALS IN STREET DUST OF SOME SELECTED LOCATIONS IN ZARIA
POLLUTANTS IN AIR AND HEAVY METALS IN STREET DUST OF SOME SELECTED LOCATIONS IN ZARIA
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Date
2011-08
Authors
OCHIGBO, VICTOR
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Abstract
Carbon-monoxide (CO), Hydrogen sulphide (H2S) and sulphurdioxide (SO2) concentrations were
determined in the morning, afternoon and evening hours at the Sabon-Gari Market, Zaria and
Aliyu Mustapha Social Centre, Ahmadu Bello University Zaria, using an automatic gas sampling
system. The concentrations of these gases have been attributed to the burning of solid and fossil
fuels and bacterial decomposition of organic matter from dump sites and gutters. The distribution
of the gaseous pollutants showed either a platykurtic (flat) or leptokurtic (peaked) distribution.
Analysis of variance using Friedman test showed no significant difference at (P<0.05) within the
study sites. Hierarchical cluster analysis carried out showed more agglomeration between site B
and D during the morning and afternoon hours respectively and between site A and D for the
evening hour for all the Sites at location1 while at location 2, their is more agglomeration
between site A and C during the morning hour and site A and B for afternoon and evening hours
respectively. The concentration of Cd, Cr, Fe, Ni and Pb were determined in the street dust of
the Sabon – Gari market Zaria using AAS. The concentration of these metals are within the
range of 0.40 – 1.45μgg-1, 16.92 – 33.82μgg-1, 240 – 315.61μgg-1, 3.05 – 6.04 μgg-1 and 25.79 –
121.35μgg-1 respectively. This indicated the order of relative abundance as Fe> Pb> Cr> Ni> Cd
for all the sites. Correlation analysis between metals indicated significant positive correlation at
(P<0.05) for Pb and Cd and at (P < 0.01) for Cd and Cr, Pb and Cr, Fe and Cr and Fe and Ni.
Metal pollution in street dust are of anthropogenic origin mainly vehicular, generator and other
gasoline powered equipment emissions.
Description
A THESIS SUBMITTED TO THE
POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
IN PARTIAL FULFILLMENT OF THE REQUIREMNENTS FOR THE AWARD
OF MASTER OF SCIENCE IN ANALYTICAL CHEMISTRY
DEPARTMENT OF CHEMISTRY
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
Keywords
POLLUTANTS,, AIR,, HEAVY METALS,, STREET DUST,, LOCATIONS