Assessment of trace metals in drinking water and groundwater sources in Ota, Nigeria
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Abstract
Description
The levels of six trace metals namely iron, lead,
manganese, copper, zinc and nickel were investigated in drinking
water and groundwater sources in Ota, Nigeria. Detected
concentrations of Mn, Cu and Zn were below the World Health
organization and Standard Organization of Nigeria maximum
permissible limits. Fe (92%) and Ni (53%) in some drinking
water and groundwater sources were found in concentrations that
exceeded the maximum permissible limits for these metals.
Notably, the levels of Pb were below detection limit in all the
bottled, well and borehole water, with exception of the hospital
borehole, while the swimming pool had high concentrations of
Fe (0.88 mg/L), Pb (0.21 mg/L) and Ni (0.19mg/L) compared to
SON (0.30 mg/L), WHO (0.01 mg/L) and WHO (0.07 mg/L)
respectively. Pollution indices indicated significant pollution of
Pb, Fe and Ni. Overall, the mean metal levels in the sampled
water sources followed a descending order,
Fe>Cu>Zn>Ni>Pb>Mn. Some of the drinking water and
groundwater sources could be considered safe for drinking, but
proactive measures should be taken to check the levels of Fe, Pb
and Ni in the swimming pool.
Keywords
QD Chemistry