Ezekiel Oiganji, K. I. Dikam


Aim: This study was carried out to assess concentration status of some
heavy metals in water along River Dilimi, Nigeria. The Nigerian inland water
bodies have been subjected to various forms of degradation due to
pollution. River Dilimi in Jos North of Plateau state capital is one of such
endangered inland water bodies. Activities around and in the river has led
to discharge of various heavy metal pollutants into the aquatic
environment rendering water unsuitable for its intended purposes.
Methodology and Results: Six (6) water samples were collected at the
upper, centre and lower section of the river at the 20 and 120 cm depth,
for every six (6) weeks making a total of eighteen (18) samples, Analyzed at
Nigerian Institute of Mining and Geosciences, Jos. The water samples
collected were pre-treated with few drops of concentrated Nitric acid, and
digested with Aqua-regia in the ratio of 3:1 for an hour. Different standard
solutions were prepared for AAS analysis under Beer-Lambert method of
metal analysis using Atomic Absorption Spectrophotometer (AAS). The
data obtained were subjected statistical analysis. The results obtained from
analyzed water samples were alarming, iron, lead, cadmium and
Manganese were above the recommended threshold by 277, 6,400, 1,233
and 580% accordingly, while zinc and copper were within permissible limit.
Conclusion, significance and impact study: River Dilimi can be said to be
highly concentrated with hazardous metals of concern like Fe, Pb, Cd and
Mn. This as a result of bioaccumulation will affect human and animal
health, aquatic life and crop productivity.


Heavy metals; Irrigation; Permissible limit; Toxicity; Water

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