Ukabiala, C. O. and Nwinyi, Obinna and Abayomi, A. and Alo, B. I.
Assessment of heavy metals in urban highway runoff
from Ikorodu expressway Lagos, Nigeria.
Journal of Environmental Chemistry and Ecotoxicology, 2 (3).
ISSN 2141 - 226X
The distribution of heavy metals in the urban high way run off from Ikorodu expressway of Lagos was
studied between March to May, 2004.The heavy metals studied include Pb, Cu, Cr, Zn and Cd. The levels
of these selected heavy metals were determined using Atomic Absorption Spectrophotometer (Mscientific
200 Model). Trends in the heavy metal from the runoff showed significant variations between
the months were values recorded in the month of April showed high values. Statistical analyses
showed different mean levels of these heavy metals assessed at the five collecting points. The
distribution shows Zn > Pb > Cu > Cr > Cd. Zn recorded the highest concentration levels between (53.4
± 35.5 - 107.5 ± 80.4 μg/l), while Cd levels (ND - 6.00 μg/L) were the lowest. However, the results obtained
falls within the permissible limits of FMENV effluents limits, FHWA and WHO standards of water for
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