In
this
study,
we
investigated
the
seasonal
variations,
chemical
composition,
sources,
and
oxidative
potential
of
ambient
PM2.5
(particles
with
a
diameter
less
than
2.5
µm)
in
Kuwait
City.
The
sampling
campaign
was
conducted
within
premises
Institute
for
Scientific
Research
from
June
2022
to
May
2023,
covering
different
seasons
throughout
year.
personal
cascade
impactor
sampler
(PCIS)
operated
at
flow
rate
9
L/min
employed
collect
weekly
samples
on
PTFE
quarts
filters.
These
collected
were
analyzed
carbonaceous
species
(i.e.,
elemental
organic
carbon),
metals
transition
elements,
inorganic
ions,
DTT
(dithiothreitol)
redox
activity.
Furthermore,
principal
component
analysis
(PCA)
multi-linear
regression
(MLR)
used
identify
predominant
emission
sources
their
percentage
contribution
activity
Kuwait.
results
study
highlighted
that
annual-averaged
mass
concentrations
(59.9
µg/m3)
substantially
exceeded
World
Health
Organization
(WHO)
guideline
10
µg/m3.
Additionally,
summer
season
displayed
highest
concentration
(75.2
compared
other
seasons,
primarily
due
frequent
dust
events
exacerbated
by
high-speed
winds.
PCA
identified
four
primary
sources:
mineral
dust,
fossil
fuel
combustion,
road
traffic,
secondary
aerosols.
found
be
source,
contributing
36.1%
mass,
followed
combustion
traffic
emissions
contributions
23.7%
20.3%,
respectively.
findings
MLR
revealed
most
significant
contributor
potential,
accounting
47%
total
conclusion,
comprehensive
investigation
provides
essential
insights
into
health
implications
Kuwait,
underscoring
critical
need
effective
air
quality
management
strategies
mitigate
impacts
particulate
pollution
region.
Journal of Hazardous Materials,
Год журнала:
2023,
Номер
448, С. 130872 - 130872
Опубликована: Янв. 25, 2023
Atmospheric
particulate
matter
(PM)
is
one
of
the
major
risks
for
global
health.
The
exact
mechanisms
toxicity
are
still
not
completely
understood
leading
to
contrasting
results
when
different
metrics
compared.
In
this
work,
PM10
was
collected
at
three
sites
determination
acellular
oxidative
potential
(OP),
intracellular
stress
(OSGC),
cytotoxicity
(MTT
assay),
and
genotoxicity
(Comet
assay).
in
vitro
tests
were
done
on
A549
cell
line.
objective
investigate
correlations
among
indicators,
variability
sites,
how
these
influenced
by
main
sources
using
PMF
receptor
model
coupled
with
MLR.
OPDTTV,
OSGCV,
strongly
combustion
sources.
Advection
African
dust
led
lower-than-average
intrinsic
indicators.
OPDTTV
OSGCV
showed
site-dependent
suggesting
that
OP
may
be
fully
representative
all
conditions.
Cytotoxicity
correlated
both
two
out
strength
correlation
larger
OSGCV.
Genotoxicity
both,
three.
Results
suggest
several
indicators
useful
gain
a
picture
health
effects
PM.
Environmental Science Atmospheres,
Год журнала:
2022,
Номер
2(5), С. 1076 - 1086
Опубликована: Янв. 1, 2022
In
this
study,
we
investigated
the
impact
of
urban
emission
sources
on
chemical
composition
ambient
particulate
matter
(PM)
as
well
associated
oxidative
potential.
We
collected
six
sets
PM
samples
in
five
location
sites
around
world
over
long
time
periods
varying
from
weeks
to
months,
intentionally
selected
for
their
be
dominated
by
unique
sources:
(1)
Environment International,
Год журнала:
2024,
Номер
187, С. 108724 - 108724
Опубликована: Май 1, 2024
The
mass
concentration
of
atmospheric
particulate
matter
(PM)
has
been
continuously
decreasing
in
the
Beijing-Tianjin-Hebei
region.
However,
health
endpoints
do
not
exhibit
a
linear
correlation
with
PM
concentrations.
Thus,
it
is
urgent
to
clarify
prior
toxicological
components
further
improve
air
quality.
In
this
study,
we
analyzed
long-term
oxidative
potential
(OP)
water-soluble
PM2.5,
which
generally
considered
more
effective
assessing
hazardous
exposure
Beijing
from
2018
2022
based
on
dithiothreitol
assay
and
identified
crucial
drivers
OP
PM2.5
online
monitoring
pollutants,
receptor
model,
random
forest
(RF)
model.
Our
results
indicate
that
dust,
traffic,
biomass
combustion
are
main
sources
Beijing.
complex
interactions
dust
particles,
black
carbon,
gaseous
pollutants
(nitrogen
dioxide
sulfur
dioxide)
factors
driving
evolution,
particular,
leading
abnormal
rise
2022.
data
shows
higher
observed
winter
spring
compared
summer
autumn.
diurnal
variation
characterized
by
declining
trend
0:00
14:00
an
increasing
23:00.
spatial
was
as
lower
than
Shijiazhuang,
while
Zhenjiang
Haikou,
primarily
influenced
distribution
carbon.
significance
identifying
key
influencing
provide
new
insights
for
advancing
quality
improvement
efforts
focus
safeguarding
human
Thermal Science,
Год журнала:
2023,
Номер
27(3 Part B), С. 2347 - 2357
Опубликована: Янв. 1, 2023
In
numerous
epidemiological
studies,
exposure
to
particulate
matter
(PM)
has
been
associated
with
negative
health
outcomes.
It
established
so
far
that
the
detrimental
effects
of
particles
cannot
be
explained
by
a
single
parameter,
such
as
particle
mass,
complexity
chemical
composition
and
reactivity
are
not
always
represented
mass
loadings.
The
oxidative
potential
(OP)
aerosol
represents
promising
indicator
their
toxicity.
To
develop
strategies
regulations
at
improving
air
quality,
an
increasing
number
studies
focused
on
application
source
apportionment
(SA)
PM.,
while
limited
SA
investigations
have
applied
OP.
this
review
previous
research
atmospheric
PM
OP
proposed
guidelines
for
future
summarized.
Most
were
carried
out
in
urban
area
PM2.5,
few
examined
other
fractions.
was
noted
three
dominant
contributors
biomass
burning
(9-97%),
secondary
aerosols
(6-67%),
traffic/vehicles
(16-88%).
presence
factors
contributed
in-crease
lesser
extent
depended
location
season.
Further,
considerable
discrepancy
contribution
various
vs.
sources
discovered
using
models.
Because
this,
use
is
equivalent
when
considering
its
