Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
281, P. 116614 - 116614
Published: June 19, 2024
A
heavily
impacted
river
basin
(Caudal
River,
NW
Spain)
by
Hg
and
Cu
mining
activities,
abandoned
decades
ago,
was
used
to
evaluate
the
environmental
quality
of
their
sediments.
The
obtained
results
compared
with
reference
values
established
US
EPA
Canadian
Council
Ministers
Environment
for
sediments,
have
shown
that
main
elements
concern
are
arsenic
(As),
mercury
(Hg)
and,
a
lesser
extent,
copper
(Cu),
which
reach
concentrations
up
1080,
80
54
mg
kg
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: May 1, 2024
Heavy-metal
contamination
in
river
and
ocean
is
a
critical
environmental
issue
that
endangers
marine
ecosystems
human
health.
Therefore,
conducting
extensive
research
to
devise
effective
mitigation
measures
imperative.
Sediment
samples
were
taken
randomly
throughout
the
study
area.
Analysis
was
done
determine
presence
of
different
metals,
including
arsenic,
cadmium,
chromium,
nickel,
copper,
zinc,
lead,
manganese.
The
assessment
pollution
levels
by
using
various
indicators
“geo-accumulation
index
(Igeo),
factor
(CF),
enrichment
(EF)”
for
accuracy.
Igeo
measurement
Cd
indicated
varying
pollution,
ranging
from
moderate
significantly
polluted,
while
Mn
revealed
no
contamination.
Elements
such
as
Ni,
Cr,
Cu,
Zn
showed
level
values
exhibited
range
0.436
(Pb)
7.637
(Cd),
with
average
spanning
0.9176
(Mn)
4.9714
suggesting
significant
regional
variation.
EF
exhibits
pattern
comparable
Igeo.
noncarcinogenic
risk
associated
exposure
As
exceeded
higher
limit
(HI
>
1)
children
adults.
Furthermore,
carcinogenic
presented
pollutants
copper
(Cu),
arsenic
(As),
nickel
(Ni),
cadmium
chromium
(Cr)
found
exceed
limits
children.
In
adults,
only
(As)
(Cu)
shown
represent
cancer
than
10
−4
.
PCA
analysis
two
(PCs)
accounted
more
65%
total
variance
River
Ravi,
determined
eigenvalues
greater
1.
This
underscores
importance
ongoing
monitoring
management
heavy-metal
ensure
sustainable
ecosystem
development
public
health
protection.
