Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 29, 2023
Abstract
The
contribution
of
urban
sewage
treatment
plants
to
pollution
with
emerging
contaminants
is
still
underestimated
and
discharge
zones
are
not
always
subject
adequate
monitoring
activities.
In
this
study,
we
apply
the
combination
risk
level
ranking
a
specific
class
pollutants
(potentially
toxic
elements)
assessment
metabolic
activity
sediment
microbial
communities.
approach
identifies
most
harmful
elements
in
local
environment
upper
sub-catchment
Iskar
River,
Bulgaria.
effect
on
communities
was
assessed
by
determination
share
viable
cells
inhibition
their
(fluorescent
staining
method
digital
image
analysis).
data
showed
that
Hg
Cu
came
at
top
list
concerns
for
matrix
surface
waters;
Cu,
Cd,
Pb
pose
greatest
sediments.
wastewater
area
were
affected
high
nutrients
organic
content
effluent.
applied
has
potential
help
us
focus
future
site-specific
control
water
bodies,
receiving
discharges,
contributes
better
understanding
ecological
risks
from
hazardous
pollutants.
Land,
Journal Year:
2024,
Volume and Issue:
14(1), P. 35 - 35
Published: Dec. 27, 2024
Heavy
metals
in
volcanic
island
soils
are
key
for
assessing
pollution
risks
and
guiding
environmental
management
strategies.
However,
research
on
heavy
remains
limited.
In
this
study,
the
concentrations
of
(Cu,
Zn,
Pb,
Cr)
surface
soil
samples
from
Weizhou
Island,
China,
were
determined
using
ICP-OES,
with
average
59.18
mg/kg,
119.06
35.63
159.78
respectively.
The
basalt
profiles
generally
exhibit
higher
metal
content
pH
values
compared
to
volcaniclastic
rock
profiles,
as
accumulates
metals.
over
rocks
show
significantly
than
those
basalt,
indicating
spatial
variability
accumulation.
Island
notably
elevated
at
both
western
wharf
island’s
tail,
characterized
by
lithology,
human
activities
further
increasing
tail.
Land
use
types
influence
content,
abandoned
land
lower
forest
dense
vegetation
organic
matter.
Principal
component
analysis
reveals
that
primarily
derived
natural
parent
material,
first
two
principal
components
comprising
59.77%
variance.
Ecological
risk
assessment
indicates
is
considered
relatively
clean,
but
Pb
presents
an
ecological
hazard,
86.54%
sites
risk.
Overall,
mainly
come
sources
lead
contamination
human-impacted
areas
require
attention.
Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
276, P. 116248 - 116248
Published: April 4, 2024
The
accumulation
of
potentially
toxic
elements
in
soil
poses
significant
risks
to
ecosystems
and
human
well-being
due
their
inherent
toxicity,
widespread
presence,
persistence.
Kangdian
metallogenic
province,
famous
for
its
iron-copper
deposits,
faces
pollution
challenges
various
elements.
This
study
explored
a
comprehensive
approach
that
combinescombines
the
spatial
prediction
by
two-point
machine
learning
method
ecological-health
risk
assessment
quantitatively
assess
potential
ecological
index
(PERI),
total
hazard
(THI)
carcinogenic
(TCR).
proportions
copper
(Cu),
cadmium
(Cd),
manganese
(Mn),
lead
(Pb),
zinc
(Zn),
arsenic
(As)
concentrations
exceeding
screening
values
(RSVs)
were
15.03%,
5.1%,
3.72%,
1.24%,
1.1%,
0.13%,
respectively,
across
725
collected
samples.
Spatial
revealed
elevated
levels
As,
Cd,
Cu,
Pb,
Zn,
mercury
(Hg),
Mn
near
mining
sites.
Potentially
exert
slight
impact
on
soil,
some
regions
exhibit
moderate
risk,
particularly
southwest.
Children
face
higher
non-carcinogenic
health
compared
adults.
Mercury
highest
while
chromium
(Cr)
greatest
all
populations.
Oral
ingestion
represents
non-oncogenic
oncogenic
age
groups.
Adults
faced
acceptable
risks.
southwest
region
confront
risks,
both
carcinogenic,
from
activities.
Urgent
measures
are
vital
mitigate
Hg
Cr
contamination
promoting
handwashing
practices
is
essential
minimize
