Atmospheric chemistry and physics,
Год журнала:
2024,
Номер
24(23), С. 13199 - 13217
Опубликована: Ноя. 29, 2024
Abstract.
Biogenic
volatile
organic
compounds
(BVOCs)
are
key
components
of
the
atmosphere,
playing
a
significant
role
in
formation
aerosols
(OAs).
However,
only
few
studies
have
simultaneously
examined
characteristics
BVOCs
and
OAs
forest
ecosystems
on
background
environmental
stressors,
such
as
consecutive
droughts
extensive
bark
beetle
infestations.
Here,
we
present
real-time
measurements
stressed
spruce-dominated
near
biogas
power
plant
(BPP)
western
Germany
during
June
2020.
A
proton-transfer-reaction
time-of-flight
mass
spectrometer
coupled
with
particle
inlet
(CHARON-PTR-ToF-MS)
Vocus-PTR-ToF-MS
were
used
to
measure
BVOCs.
The
average
OA
concentration
was
0.8
±
0.5
µg
m−3,
consisting
mainly
semi-volatile
monoterpene
oxidation
products.
mixing
ratios
isoprene
(0.58
0.54
ppb)
monoterpenes
(2.5
5.3
higher
than
values
previously
measured
both
German
temperate
forests
boreal
forests.
Based
wind
direction
analysis,
BVOC
data
categorized
into
two
groups:
one
influenced
by
biogenic
emissions
from
an
intact
clear-cut
area
(referred
group)
other
anthropogenic
BPP
village
group).
High
observed
group,
indicating
contribution
emissions.
In
variations
driven
interplay
between
meteorology,
their
photochemical
consumption.
Positive
matrix
factorization
analysis
VOCs
revealed
substantial
contributions
oxygenated
daytime,
while
weakly
oxidized
products
dominated
at
night.
Furthermore,
increasing
relative
humidity
decreasing
temperatures
promoted
gas-to-particle
partitioning
these
products,
leading
increase
nighttime
mass.
results
demonstrate
that
not
meteorological
conditions
but
also
local
subsequent
chemical
transformation
processes.
This
study
highlights
need
investigate
changes
European
ACS ES&T Air,
Год журнала:
2024,
Номер
1(7), С. 690 - 703
Опубликована: Май 3, 2024
Although
atmospheric
organic
pollutants
have
been
extensively
studied
to
elucidate
summertime
urban
photochemical
air
pollution,
uncertainties
remain
concerning
the
quality
of
wintertime
in
large
northern
North
American
cities.
Here,
we
used
online
mass
spectrometric
measurements
volatile
compounds
(VOCs)
and
aerosol
(OA),
combined
with
positive
matrix
factorization
(PMF),
identify
sources
downtown
Toronto,
Canada
during
February–March
2023.
In
some
cases,
comparable
PMF
factors
were
identified
for
both
VOCs
OA,
such
as
from
traffic,
cooking,
background
oxygenated
sources.
However,
VOC
yielded
additional
information,
a
factor
associated
human-related
emissions
VOCs.
Additionally,
yields
two
traffic
factors:
one
likely
related
gasoline
diesel
use.
Despite
cold
relatively
dark
conditions,
OA
grow
intensity
daytime,
indicative
activity,
whereas
cooking
enhanced
morning
late
evening
due
timing
vehicle
use,
boundary
layer
effects.
This
study
illustrates
benefits
that
arise
parallel
source–receptor
analyses
gases
particles.
Sustainability,
Год журнала:
2024,
Номер
16(4), С. 1687 - 1687
Опубликована: Фев. 19, 2024
Sustainable
use
of
biomass
energy
sources
can
reduce
dependency
on
fossil
fuels.
Wood
is
the
primary
source
for
heating
in
Slovenia,
with
firewood
and
wood
pellets
having
highest
share.
Slovenia’s
largest
consumers
fuels
are
households
primarily
using
from
their
forests
or
imported
pellets.
This
research
used
a
life
cycle
assessment
to
analyze
evaluate
environmental
impacts
household
Slovenia
first
time.
The
results
showed
that
logs
have
considerably
greater
effect
stratospheric
ozone
depletion,
formation,
fine
particulate
matter
(PM)
formation.
impact
global
warming
was
lower
due
short
transportation
distances
log
boilers
high
combustion
efficiency
(0.016
0.041
kg
CO2
eq
pellet
combustion,
respectively).
An
increase
distance
100
km
1000
resulted
an
84.9%
values
categories
formation
human
health,
120.4%
resource
scarcity,
102.4%
warming,
supporting
premise
distribution
routes
necessary
more
sustainable
source.
Toxics,
Год журнала:
2024,
Номер
12(4), С. 293 - 293
Опубликована: Апрель 16, 2024
To
study
the
spatiotemporal
variability
of
particle-bound
polycyclic
aromatic
hydrocarbons
(PAHs)
and
assess
their
carcinogenic
potential
in
six
contrasting
urban
environments
Greece,
a
total
305
filter
samples
were
collected
analyzed.
Sampling
sites
included
variety
background,
traffic
(Athens,
Ioannina
Heraklion),
rural
(Xanthi)
near-port
locations
(Piraeus
Volos).
When
considering
sum
16
U.S.
EPA
priority
PAHs,
as
well
that
EU-proposed
members,
average
concentrations
observed
across
during
summer
varied
moderately
(0.4–2.2
ng
m−3)
independently
population
each
site,
with
highest
values
areas
Piraeus
Volos
are
affected
by
port
industrial
activities.
Winter
levels
significantly
higher
more
spatially
variable
compared
to
summer,
seasonal
enhancement
ranging
from
7
times
98
Ioannina,
indicating
large
impact
PAH
emissions
residential
wood
burning.
Regarding
benzo(a)pyrene
(BaP),
an
IARC
Group
1
carcinogen
only
EU-regulated
PAH,
winter/summer
ratios
24–33
Athens,
Volos,
Heraklion
Xanthi;
60
Piraeus;
480
which
is
afflicted
severe
wood-burning
pollution
events.
An
excellent
correlation
was
between
organic
carbon
(OC)
(BaP)
cold
period
at
all
(r2
>
0.8)
stable
BaP/OC
slopes
(0.09–0.14
×
10−3),
highlighting
use
OC
proxy
for
estimation
BaP
winter
conditions.
The
identified
contrasts,
explored
first
time
PAHs
such
scale
Eastern
Mediterranean,
provide
important
insights
into
sources
controlling
atmospheric
conditions
reveal
deviations
exposure
risks
among
cities
raise
issue
environmental
injustice
on
national
level.
Toxics,
Год журнала:
2025,
Номер
13(2), С. 88 - 88
Опубликована: Янв. 24, 2025
Solid
fuel
combustion,
while
a
crucial
source
of
energy
in
many
regions
around
the
world,
remains
one
primary
contributors
to
air
pollution,
with
significant
implications
for
human
health
[...]
Applied Sciences,
Год журнала:
2025,
Номер
15(4), С. 2051 - 2051
Опубликована: Фев. 15, 2025
In
this
study,
an
intumescent
fire
retardant
(IFR)
bioadditive
was
designed
based
on
a
commercial
Saccharomyces
cerevisiae
yeast
protein
matrix.
Lignosulfonate
used
as
cohesive
reinforcement
of
its
polymeric
structure,
along
with
magnesium
hydroxide
Mg(OH)2,
agents
that
enhance
the
binder-intumescent
properties,
aim
improving
thermal
stability
and
resistance
PVAc
adhesive.
Firstly,
two
formulations
were
elaborated
characterized
for
their
physicochemical
electrical
dynamic
mechanical
analysis
(DMA),
adherence
properties
(shear
strength),
resistance,
to
modify
Thus,
it
found
IFR
formulation
higher
percentage
Mg(OH)2
more
thermally
stable
than
other
one,
although
both
them
able
adhesive
PVAc.
Then,
ten
blends
modified
these
different
bioadditives
added
in
proportions,
including
shear
test
(dry,
elevated
temperature,
three-cycle
conditions)
delamination.
Based
results,
five
selected,
we
performed
following
tests:
penetration,
volatile
organic
compounds
(VOCs),
morphological
elemental
by
scanning
electron
microscope
(SEM/EDS).
From
blends,
samples
which
improve
high
temperature
performance
Atmosphere,
Год журнала:
2024,
Номер
15(12), С. 1426 - 1426
Опубликована: Ноя. 27, 2024
This
study
investigates
the
temporal
and
spatial
variations
in
PM2.5
concentrations
Dhaka,
Bangladesh,
from
2001
to
2023
evaluates
impact
of
meteorological
factors
effectiveness
mitigation
strategies
on
air
pollution.
Using
satellite
ground-based
data,
this
analyzed
seasonal
trends,
daily
fluctuations,
influence
COVID-19
lockdown
measures
quality.
Our
findings
reveal
a
persistent
increase
levels,
particularly
during
winter,
with
frequently
exceeding
WHO
guidelines.
analysis
suggests
significant
correlations
between
conditions
concentration,
highlighting
role
conditions,
such
as
rainfall,
humidity,
temperature,
modulating
levels.
found
that
levels
exhibited
inverse
correlation
relative
humidity
(r
=
−0.72),
rainfall
−0.69),
temperatures
−0.79),
mitigating
pollution
Additionally,
underscores
temporary
improvements
quality
periods,
demonstrating
potential
benefits
sustained
emission
control
measures.
The
research
emphasizes
need
for
comprehensive
multi-faceted
management
strategies,
including
stringent
vehicular
industrial
emissions
regulations,
enhancement
urban
green
spaces,
public
awareness
campaigns
mitigate
adverse
health
impacts
Dhaka.
Atmosphere,
Год журнала:
2024,
Номер
15(1), С. 95 - 95
Опубликована: Янв. 11, 2024
Excessive
particle
concentrations
during
heating
periods,
which
greatly
affect
people’s
physical
and
mental
health
their
normal
lives,
continue
to
be
a
concern.
It
is
more
practical
understand
analyze
the
relationship
between
fractal
dimension
size
concentration
distribution
of
atmospheric
particulate
matter
before
after
adjusting
energy
consumption
types.
The
data
discussed
analyzed
in
this
paper
were
collected
by
monitoring
stations
measured
from
2016
2018
Xi’an.
include
changes
results
indicate
that
types
has
significant
impact
on
matter.
average
PM2.5
decreased
26.4
μg/m3.
PM10
31.8
At
same
time,
different
sizes
showed
downward
trend.
particles
ranging
0.265
0.475
μm
demonstrated
maximum
decrease,
was
8.80%.
period
Xi’an
mainly
involves
0
μm.
dimensions
4.809
3.397,
respectively.
After
types,
1.412.
proportions
less
than
1.0
μm,
2.0
2.5
1.467%,
0.604%,
0.424%,
This
provides
new
methods
reference
value
for
effective
control