Atmospheric Environment X,
Journal Year:
2023,
Volume and Issue:
21, P. 100232 - 100232
Published: Dec. 19, 2023
Volatile
organic
compounds
(VOCs)
emitted
from
fugitive
sources
are
crucial
for
environmental
and
health
risk
assessments.
However,
monitoring
these
emissions
at
ground
level,
according
to
traditional
technical
specifications,
has
made
it
challenging
identify
polluted
air
masses
collect
purposeful
samples.
In
this
study,
we
focused
on
utilizing
an
unmanned
aerial
vehicle
system
obtain
samples
around
a
petrochemical
industrial
park.
We
conducted
quantitative
analysis
of
108
VOC
species
compared
the
results
between
ground-level
The
findings
indicated
higher
presence
reactive
in
sample
pairs
exhibited
relatively
homogeneous
compositions
hydrocarbons
with
fewer
than
eight
carbon
atoms,
suggesting
well-mixed
condition
light
compounds.
Conversely,
exclusively
high
mixing
ratios
C8–C15
compounds,
including
branched
paraffins
aldehydes.
Based
quantified
VOCs,
evaluated
ozone
formation
potential
(OFP)
secondary
aerosol
(SOAP).
highlighted
aldehydes,
alkenes,
aromatics,
particularly
propanal,
2-butene,
m/p-xylene,
benzaldehyde,
as
priority
control
Additionally,
semiquantitative
concentrations
non-quantitative
ranged
1
15
ppbv,
total
content
exceeding
150
significant
contribution
ambient
pollution.
These
provide
valuable
insights
into
identification
emission
assessment
repercussions
attributed
intermediate-volatile
plant.
ACS ES&T Air,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 11, 2025
To
reduce
the
uncertainty
in
analyzing
ozone
(O3)
sensitivities
based
on
observed
concentrations
of
volatile
organic
compounds
(VOCs)
and
nitrogen
dioxide,
this
study
proposed
application
consumed
VOC
to
establish
their
nonlinear
relationship
actual
atmosphere.
These
parameters
were
calculated
reaction
rates
online
observations
VOCs,
O3
at
Deyang,
Chengdu,
Meishan
Chengdu
Plain,
China,
during
summer
2019.
The
nighttime
isoprene
consumption
was
maximum
2.03
ppbv
Meishan.
daytime
acetaldehyde
a
2.68
possibly
due
its
higher
primary
emissions
secondary
production
by
both
OH
radicals
photolysis.
When
ratios
total
or
initial
NOx
(NOx
=
NO
+
NO2)
3.51
ppbv–1
2.22
ppbv–1,
variations
reached
8.45
7.52
ppbv,
respectively.
delineated
VOC-sensitive
NOx-sensitive
areas.
Over
98%
hourly
data
areas
Meishan,
respectively,
while
over
14%
belonged
Deyang.
This
provided
more
accurate
method
for
assessing
real-time
sensitivity
thus
implementing
dynamic
hierarchical
control
strategies.
Atmosphere,
Journal Year:
2025,
Volume and Issue:
16(2), P. 231 - 231
Published: Feb. 18, 2025
This
study
introduces
a
novel
artificial
intelligence
(AI)
modeling
framework
that
combines
machine
learning
algorithms
optimized
through
metaheuristics
with
explainable
AI
to
capture
complex
interactions
among
pollutant
concentrations,
meteorological
data,
and
socio-economic
indicators.
Applied
COVID-19-related
dataset
comprising
404
variables,
benzene
concentrations
as
the
target—measured
using
proton
transfer
reaction–mass
spectrometry
in
Belgrade,
Serbia—the
demonstrated
exceptional
sensitivity
assessing
impact
of
environmental
societal
changes
during
pandemic.
Explainable
techniques,
such
SHAP
SAGE,
were
employed
reveal
influence
each
predictor,
while
clustering
values
identified
distinct
settings
influenced
behavior.
Three
regarding
levels
onset
state
emergency.
The
first,
involving
local
petroleum-related
activities,
biomass
burning,
chemical
manufacturing,
traffic,
led
15.7%
reduction
levels.
second,
characterized
by
non-combustion
processes,
nocturnal
chemistry,
specific
context,
resulted
51.9%
increase.
third,
driven
industrial
contributed
modest
2.33%
reduction.
underscored
critical
role
shaping
air
behavior,
emphasizing
importance
integrating
broader
contexts
into
models
gain
more
comprehensive
understanding
pollutants
their
dynamics.
Atmospheric chemistry and physics,
Journal Year:
2025,
Volume and Issue:
25(6), P. 3807 - 3820
Published: April 1, 2025
Abstract.
The
emissions
and
secondary
transformations
of
volatile
organic
compounds
(VOCs)
play
a
significant
role
in
ozone
(O3)
formation.
Previous
studies
have
often
relied
on
ambient
VOC
concentrations
to
identify
key
species.
However,
represent
the
residual
after
emitted
VOCs
been
consumed,
which
can
introduce
substantial
uncertainties.
To
address
this
issue,
study
proposes
novel
method
species
both
anthropogenic
biogenic
emissions.
are
calculated
during
nighttime
daytime
summer
using
nitrate
radical,
O3,
hydroxyl
radical
reaction
rates
99
measured
at
Deyang,
Chengdu,
Meishan,
China.
alkenes
aromatics
higher
than
concentrations.
largest
differences
between
1.04
ppbv
for
cis-2-butene
0.81
isoprene
1.79
Meishan.
In
contrast,
due
production,
oxygenated
lower
−0.54
acetone
−0.58
acetaldehyde
−0.5
Based
concentrations,
is
one
top
three
contributing
O3
formation
all
sites,
may
be
overlooked
observed
Comprehensive
calculation
enables
accurately
identified.
