Journal of Multidisciplinary Applied Natural Science,
Год журнала:
2022,
Номер
3(1), С. 1 - 23
Опубликована: Авг. 1, 2022
This
research
focused
on
the
level,
pollution,
and
ecological
risk
assessment
of
selected
heavy
metals
from
agricultural
soils
at
major
roadsides
in
Nasarawa
Eggon
Doma
areas.
Composite
soil
samples
were
collected
0–20
cm
depth,
homogenised,
assayed
for
metal
(As,
Cd,
Co,
Cr,
Cu,
Fe,
Hg,
Mn,
Ni,
Pb,
U
Zn)
levels
using
X–ray
fluorescence
technique.
Pollution
toxicity
studied
determined
by
evaluating
enrichment
factor
(Ef),
geo–accumulation
index
(Igeo),
contamination
(Cf),
degree
(Cd),
pollution
load
(PLI),
(ERA).
The
result
showed
that
concentrations
As,
Fe
Ni
lower
than
average
shale
values,
except
As
site
N2
area
D4
area.
Ef
suggests
a
significant
anthropogenic
contribution
to
presence
Pb
Zn
some
sampled
sites.
Igeo
indicated
polluted
Hg
while
Co
those
Doma.
Cf
values
revealed
most
contaminated
with
addition
All
sites
have
low
Cd
N4
(Nasarawa
Eggon)
D2
(Doma).
However,
PLI
only
polluted.
ERA
posed
potential
risks
ranging
level
different
Sites
N2,
moderate
index.
Therefore,
this
study
inputs
automobile
emissions
human
activities
along
roads
could
pose
negative
health
implications
animal
health.
Journal of Water Process Engineering,
Год журнала:
2023,
Номер
53, С. 103829 - 103829
Опубликована: Май 20, 2023
The
existence
of
soils
contaminated
with
organochlorine
pesticides
represents
a
serious
environmental
problem.
In
this
work,
real
soil
hexachlorocyclohexanes
(ΣHCH
=
373
mg
kg−1),
persistent
organic
pollutants
included
in
the
Stockholm
Convention,
was
remediated.
Surfactants
were
used
to
enhance
solubilization
and
activated
persulfate
(PS)
oxidation
degrade
pollutants.
Solubilization
experiments
performed
evaluate
effect
surfactant
(sodium
dodecyl
sulfate
(SDS),
Emulse-3®
(E3)
Tween-80®
(T80)),
pH,
reagents
addition
order
concentration
(Csurfactant
0–10
g
L−1,
CNaOH
0–13.5
L−1).
selection
attending
their
ability
solubilize
chlorinated
compounds
(COCs).
use
surfactants
improved
COCs
solubilization,
especially
at
pH
>
12;
conditions
which
HCHs
hydrolyze
trichlorobenzenes
(TCBs),
higher
solubility.
concentration,
emulsion.
83
%
89
achieved
three
consecutive
cycles
highly
alkaline
using
SDS
E3,
respectively
(T80
unstable).
resulting
emulsions
treated
by
PS
alkali
intensified
temperature.
conversion
30
96
when
treating
E3
SDS-emulsions
(72
h),
respectively,
highlighting
suitability
for
integrated
process.
Proceedings of universities Applied chemistry and biotechnology,
Год журнала:
2025,
Номер
15(1), С. 67 - 81
Опубликована: Апрель 7, 2025
The
study
was
aimed
at
comparing
the
effect
of
oil,
diesel
fuel,
and
motor
oil
on
capillary
moisture
capacity
hygroscopic
content
gray
forest
soil,
as
well
assessing
changes
in
these
characteristics
oil-contaminated
soils
following
their
washing
with
polysorbate
80.
Water
a
solution
(with
detergent
concentrations
1,
5,
10
g/L)
were
added
to
soil
be
continuously
mixed
for
1
h
20
°С
using
shaker
(60
rpm).
analyzed
agrophysical
are
shown
decrease
when
contaminated
50,
150,
300
mL/kg.
is
more
pronounced
than
those
fuel
similar
concentrations,
while
is,
conversely,
less
pronounced.
80
partially
restored
characteristics;
however,
they
remained
lower
original
samples.
effectiveness
also
confirmed
by
reduction
phytotoxicity
samples
solutions.
At
level
contamination
up
150
mL/kg,
solutions
containing
5
g/L
found
effective,
whereas
it
recommended
increase
concentration
g/L.
weight
ratio
solution,
water
1:1:4.
Thus,
prospects
mitigate
negative
impact
demonstrated.
