Agronomy,
Год журнала:
2024,
Номер
14(8), С. 1777 - 1777
Опубликована: Авг. 13, 2024
The
closed-loop
material
and
energy
cycles
of
islands
increase
the
susceptibility
their
internal
ecosystem
components
to
heavy
metal
accumulation
transfer.
However,
limited
research
on
island
scale
hinders
our
understanding
environmental
geochemistry
in
this
unique
environment.
This
study
focused
assessing
a
tropical
island’s
ecological
risk
by
investigating
contamination
potential
sources.
results
revealed
elevated
cadmium
nickel
concentrations
0.44–1.31%
soil
samples,
particularly
coastal
plains
developed
areas.
Using
absolute
principal
component
score-multiple
linear
regression
(APCS-MLR)
model
assisted
GIS
mapping,
we
identified
three
sources:
geological
factors,
agricultural
activities,
traffic
emissions.
Network
analysis
indicated
direct
exposure
risks
vegetation
microorganisms
contaminated
(0.4611
0.7687,
respectively),
with
posing
highest
risk,
followed
Zn,
Cd,
Pb,
Cu,
Cr
transferring
across
trophic
levels.
These
findings
provide
crucial
insights
for
mitigating
associated
metals
controlling
priority
pollutants
sources
environments.
The
land
use
in
agricultural
areas
contributes
to
economic
growth
while
concurrently
accompanied
by
a
series
of
environmental
pollution
issues.
Xingguo
County,
Ganzhou
City,
Jiangxi
Province,
is
typical
area
with
selenium-rich
soil,
and
the
rice
navel
oranges
grown
there
have
high
nutritional
value.
This
study
analyzed
distribution
heavy
metals
soil
this
through
kriging
interpolation
method,
evaluated
risks
using
different
index
methods,
quantitatively
their
sources
principal
component
analysis
(PCA)
positive
matrix
factorization
(PMF),
aim
protecting
ecological
resources
providing
theoretical
references
for
avoiding
metal
crops
soil.
research
results
indicate
following:
(1)
Based
on
background
values
Ganzhou,
all
caused
except
As
Hg,
among
which
Cd
poses
highest
potential
risk
area.
According
Environmental
Quality
Standards
Soil
(EQSS),
concentrations
not
exceeded
standards
relatively
low
risks.
(2)
In
terms
health
risks,
basically
do
bring
non-carcinogenic
but
acceptable
carcinogenic
adults
children,
Cd.
children
are
higher
than
those
adults,
main
exposure
route
ingestion.
Among
types,
orchards
highest.
(3)
Combining
method
PCA
PMF
models,
it
can
be
determined
that
two
area:
one
natural
other
anthropogenic.
anthropogenic
sources,
contribute
most
pollution.
Through
these
results,
found
detection
should
conducted
land,
risk-based
management
measures
implemented.
Ecological Indicators,
Год журнала:
2024,
Номер
159, С. 111769 - 111769
Опубликована: Фев. 1, 2024
Ecosystem
resilience
plays
a
vital
role
for
security
and
in
the
urban
system
which
experiences
combined
effects
of
anthropogenic
activities
natural
disasters.
Nonetheless,
there
is
currently
no
unified
indicator
assessing
resilience.
Therefore,
this
study
aims
to
examine
changes
ecosystem
Guangdong-Hong
Kong-Macao
Great
Bay
Area
(GBA)
based
on
land
use,
using
framework
resistance,
adaption,
elasticity.
The
study's
results
revealed
that
between
2000
2020,
increase
peripheral
GBA
cities
outpaced
decrease
central
cities,
leading
yearly
rise
overall
Nighttime
light
(NL),
population
density
(PD),
urbanization
rate
(UR),
normalized
difference
vegetation
index
(NDVI)
were
primary
driving
factors
influencing
resistance
elasticity
GBA,
thereby
shaping
Findings
from
multi-scale
geographical
weighted
regression
(MGWR)
analysis
demonstrated
decreased
as
NL,
PD,
UR
increased,
while
it
exhibited
an
areas
with
higher
NDVI.
This
contributes
improvement
by
providing
targeted
strategies,
expediting
development
resilient
offering
theoretical
insights
management,
planning,
policy
formulation.
Sustainability,
Год журнала:
2024,
Номер
16(4), С. 1673 - 1673
Опубликована: Фев. 18, 2024
Source
apportionment
and
risk
assessment
are
critical
for
making
effective
pollution
prevention
control
policies.
The
study
was
carried
out
to
assess
source-specific
ecological
human
health
risks
associated
with
heavy
metals
in
farmland
soils
Yingtan
City
based
on
results
of
receptor
models.
Multivariate
analysis
the
APCS-MLR
model
consistently
revealed
that
As,
Ni,
Cr
agricultural
may
be
mainly
derived
from
natural
sources,
while
contents
Cu,
Zn,
Cd,
Pb
have
been
significantly
elevated
by
activities.
According
outputs
model,
Cu
(34.3%),
Zn
(67.2%),
(75.1%),
Cd
(67.9%)
primarily
originated
industrial
activities
related
mineral
mining
non-ferrous
metal
smelting
processes.
indicated
sources
were
primary
contributor
total
risks,
posing
moderate
high
southern
mountainous
regions.
Natural
origins
played
a
significant
role
due
substantial
amounts
As
naturally
occurring
soils.
findings
could
guide
development
management
measures
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Май 13, 2024
Abstract
The
contamination
and
quantification
of
soil
potentially
toxic
elements
(PTEs)
sources
the
determination
driving
factors
are
premise
control.
In
our
study,
788
samples
from
National
Agricultural
Park
in
Chengdu,
Sichuan
Province
were
used
to
evaluate
degree
PTEs
by
pollution
load
index.
source
identification
was
performed
using
positive
matrix
decomposition
(PMF),
edge
analysis
(UNMIX)
absolute
principal
component
score-multiple
line
regression
(APCS-MLR).
geo-detector
method
(GDM)
drivers
help
interpret
derived
receptor
models.
Result
shows
that
Cu,
Pb,
Zn,
Cr,
Ni,
Cd,
As
Hg
average
content
35.2,
32.3,
108.9,
91.9,
37.1,
0.22,
9.76
0.15
mg/kg
this
study
area.
Except
for
As,
all
higher
than
corresponding
background
values
Province.
best
performance
APCS-MLR
determined
comparison,
considered
as
preferred
model
distribution
ACPS-MLR
results
showed
82.70%
61.6%
75.3%
91.9%
Cr
89.4%
Ni
came
traffic-industrial
emission
sources,
60.9%
domestic-transportation
57.7%
Cd
agricultural
89.5%
natural
sources.
GDM
distance
first
grade
highway,
population,
land
utilization
total
potassium
(TK)
main
affecting
these
four
with
q
0.064,
0.048,
0.069
0.058,
respectively.
can
provide
reference
reducing
farmland
soil.
