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Physico-chemical
Properties,
Heavy-metal
Contents and
Radioactivity
Levels in Soils
around a
Cement-production
Facility in Ogun
State, Nigeria
O. I. Adekoyaa,
O. E. Popoolab
and
S. A. Olalerua
a
Physical Science
Department, Yaba
College of
Technology,
Lagos, Nigeria.
b
Science
Laboratory
Technology
Department, Yaba
College of
Technology,
Lagos, Nigeria.
Corresponding
Author:
O. I. Adekoya
Email: olasojiadekoya@gmail.com
Doi: https://doi.org/10.47011/15.5.9
Cited by :
Jordan J. Phys.,
15 (5) (2022)
519-526
PDF
Received
on:
22/04/2021;
Accepted
on:
29/06/2021
Abstract:
The
physico-chemical
properties,
heavy
metal
content
and the
primordial
radionuclide
activities
in soil
samples
from
four
locations
around a
cement
production
facility
were
studied.
The
physico-
chemical
properties
of the
soil
samples
were
determined
after
aqua
regia
(HNO3:HCl)
digestion
and
analysis
with
atomic
absorption
spectrophotometer
(AAS)
Perkin
Elmer
Analyst
200,
while
the
activity
concentration
of the
radionuclides
was
determined
by a
non-destructive
analysis
using a
computerized
gamma-ray
spectrometry
system
with
high-purity
germanium
(HPGe).
The pH
and
electrical
conductivity
in the
soil
were in
the
range of
6.57 to
7.39 and
25.5 to
462 µs
cm-1,
respectively.
The
cation-exchange
capacity
(meq/100
g) for
Na+,
K+,
Ca2+
and Mg2+
were
within
the
ranges
0.142 to
0.622,
0.145 to
1.725,
2.112 to
4.279
and
0.092 to
0.271,
respectively.
Lead and
cadmium
were
each
detected
in only
one
sample.
The
average
activity
for
Uranium
-238,
Thorium
- 232
and
Potassium
- 40 in
soil was
between
3.177 ±
0.330 Bq
kg-1
-
7.934±1.190
Bq kg-1,
4.201±0.429
Bq kg-1
– 10.702
± 1.504
Bq kg-1
and
97.733 ±
2.268 Bq
kg-1
–
144.926
± 21.738
Bq kg-1,
respectively.
The
physico-chemical
properties
obtained
were
within
the
range of
values
observed
by an
earlier
study
conducted
in the
area;
the
concentrations
of the
heavy
metals
in the
soils as
well as
the
radiological
hazard
indices
due to
the
presence
of
naturally
-occuring
radionuclide
materials
(NORMs)
in the
soils
were
very low
and are
not
expected
to
constitute
any
environmental
hazard.
Keywords:
Physico-chemical
properties,
Radioactivity,
Cement,
Ewekoro,
Effective
dose.
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