Watershed Ecology and the Environment,
Год журнала:
2022,
Номер
4, С. 148 - 157
Опубликована: Янв. 1, 2022
The
contamination
levels
and
distribution
of
heavy
metals
were
assessed
in
riverbed
sediments
water
column
samples
from
Mura
Kimpulande
Rivers,
both
impacted
by
copper-cobalt
gold
mining
activities.
Analyses
performed
using
inductively
coupled
plasma-mass
spectrometry
(ICP-MS),
atomic
absorption
(AAS),
fluorescence
(AFS).
Results
showed
high
concentrations
Ni,
Cu,
Zn,
As,
Cd,
Hg
samples.
rivers
exceeded
the
limits
set
Democratic
Republic
Congo
(DRC)
legislation
on
requirements
for
mine
discharges.
High
found
also
Cr,
Pb,
river
against
sediment
quality
guidelines
protection
aquatic
life.
Enrichment
factor
(EF)
Geoaccumulation
index
(Igeo)
values
revealed
extremely
severe
enrichment
Co,
Cd
extreme
pollution
Cu
Co
demonstrating
these
rivers.
results
calculated
ecologic
risk
factors
that
ecosystems
investigated
are
at
risk.
Therefore,
a
review
current
practices
is
needed
urgent
enforcement
good
recommended
order
to
protect
environment
public
health.
Environmental Geochemistry and Health,
Год журнала:
2025,
Номер
47(6)
Опубликована: Май 22, 2025
Abstract
Heavy
metal
toxicity
risk
assessments
in
sediments
often
rely
on
pseudototal
concentrations,
despite
the
higher
theoretical
predictive
potential
of
bioavailable
fractions.
This
study
introduces
Bioavailable
Fraction
Toxicity
Factor
(BTf)
and
Index
(BTI)
to
evaluate
risks
using
a
fraction
calculated
as
sum
first
two
steps
Tessier
sequential
extraction
procedure.
Investigating
heavy
pollution
(Cd,
Cr,
Cu,
Mn,
Ni,
Pb,
Zn)
Vetas
River
catchment,
critical
freshwater
source
Santurbán
Páramo
within
Tropical
Andes
biodiversity
hotspot,
identified
artisanal
small-scale
mining
primary
driver
contamination.
Water
sediment
areas,
particularly
La
Baja
Creek
El
Volcán
Village,
exhibited
highest
concentrations
metals,
with
some
levels
being
categorized
strongly
contaminated
by
Geoaccumulation
Pollution
Load
exceeding
Probable
Effect
Concentration
threshold.
metals
were
measured.
fractions
mining-affected
suggesting
greater
for
release
under
acidic
conditions.
The
BTf
BTI
provided
more
nuanced
understanding
compared
values
mining-influenced
sites.
These
findings
underscore
need
mitigation
measures
address
highlight
ecological
importance
Páramo.
Further
research
into
bioremediation
local
flora
is
recommended
support
sustainable
management
practices.
Water Air & Soil Pollution,
Год журнала:
2025,
Номер
236(8)
Опубликована: Июнь 2, 2025
Abstract
This
study
investigates
toxic
metal
contamination
in
the
sediments
of
Değirmendere
River
Basin
(riverbed
and
estuary)
Türkiye,
with
aim
assessing
pollution
levels,
ecological
risks,
seasonal
variability
concentrations.
Sediment
samples
were
collected
from
20
stations
during
summer
winter
2022
analyzed
using
geochemical
statistical
methods.
The
metals
evaluated
include
Cu,
Pb,
Zn,
Ni,
As,
Co,
V,
La.
findings
reveal
that
Cu
(79.46
±
20.17
μg
g
-1
)
Pb
(63.83
15.11
exceeded
thresholds,
highest
concentrations
observed
winter,
particularly
estuarine
areas
affected
by
industrial
urban
activities.
Seasonal
variations
significant
for
Zn
(Mann-Whitney
U,
p
<
0.05),
higher
likely
due
to
increased
runoff
erosion.
Geoaccumulation
Index
(I
geo
Enrichment
Factor
(SEF)
indicated
moderate
As.
risk
index
(RI)
categorized
estuary
as
a
considerable
area,
RI
values
ranging
150
319.2.
These
highlight
anthropogenic
impacts
on
sediment
quality
Basin,
emphasizing
urgent
need
continuous
monitoring
targeted
mitigation
measures.
IOP Conference Series Earth and Environmental Science,
Год журнала:
2025,
Номер
1499(1), С. 012049 - 012049
Опубликована: Май 1, 2025
Abstract
This
study
investigated
the
heavy
metals
(HMs)
pollution
in
Styr
River,
focusing
on
environmental
impacts
of
wastewater
discharge
from
nuclear
power
plant
(NPP).
Thus,
main
purpose
was
to
evaluate
HM
concentrations,
assess
compliance
with
international
and
regional
standards,
identify
potential
ecological
health
risks.
Over
a
four-year
period
(2018–2022),
water
samples
were
collected
upstream
(S1)
downstream
(S2)
NPP
point.
The
concentrations
Zn,
Cd,
Pb,
Cu,
Ni,
Mn,
As,
Cr
analysed
using
inductively
coupled
plasma
optical
emission
spectroscopy
(ICAP
7400
Duo).
Statistical
methods,
including
correlation
analyses,
applied
determine
relationships
between
at
S1
S2.
All
measured
below
permissible
levels
set
by
indicating
low
contamination
risk.
Correlation
analyses
showed
strong
positive
correlations
for
Cr,
Cu
S2,
while
Cd
As
exhibited
weak
correlations.
findings
confirm
that
NPP’s
does
not
significantly
elevate
River.
However,
variability
distribution
emphasizes
need
continuous
monitoring
advanced
methodologies
safeguard
aquatic
ecosystems
public
health.
Watershed Ecology and the Environment,
Год журнала:
2022,
Номер
4, С. 148 - 157
Опубликована: Янв. 1, 2022
The
contamination
levels
and
distribution
of
heavy
metals
were
assessed
in
riverbed
sediments
water
column
samples
from
Mura
Kimpulande
Rivers,
both
impacted
by
copper-cobalt
gold
mining
activities.
Analyses
performed
using
inductively
coupled
plasma-mass
spectrometry
(ICP-MS),
atomic
absorption
(AAS),
fluorescence
(AFS).
Results
showed
high
concentrations
Ni,
Cu,
Zn,
As,
Cd,
Hg
samples.
rivers
exceeded
the
limits
set
Democratic
Republic
Congo
(DRC)
legislation
on
requirements
for
mine
discharges.
High
found
also
Cr,
Pb,
river
against
sediment
quality
guidelines
protection
aquatic
life.
Enrichment
factor
(EF)
Geoaccumulation
index
(Igeo)
values
revealed
extremely
severe
enrichment
Co,
Cd
extreme
pollution
Cu
Co
demonstrating
these
rivers.
results
calculated
ecologic
risk
factors
that
ecosystems
investigated
are
at
risk.
Therefore,
a
review
current
practices
is
needed
urgent
enforcement
good
recommended
order
to
protect
environment
public
health.
