Analytical Methods for Atmospheric Carbonyl Compounds: A Review
Atmosphere,
Год журнала:
2025,
Номер
16(1), С. 107 - 107
Опубликована: Янв. 19, 2025
Atmospheric
carbonyl
compounds
have
significant
impacts
on
the
atmospheric
environment
and
human
health,
making
selection
of
appropriate
analytical
techniques
crucial
for
accurately
detecting
these
in
specific
environments.
Based
extensive
literature
research,
this
study
summarized
development
history,
relevant
features,
applicable
scenarios
main
compounds;
pointed
out
problems
challenges
field;
discussed
needs
prospects
future
research
application.
It
was
found
that
direct
sampling
methods
were
to
low-molecular-weight
species
with
low
reactivity,
boiling
points,
high
polarity,
volatility,
while
indirect
suitable
a
wider
range
various
types
phases
species.
For
formaldehyde,
offline
detection
primarily
influenced
by
chemical
reagents
reaction
conditions,
whereas
online
monitoring
relied
sufficiently
stable
operating
multiple
compounds,
results
greatly
detectors
coupled
chromatography,
all
volatile
organic
(VOCs),
including
some
providing
higher
temporal
resolution
improved
isomer
identification
mass
spectrometry.
The
combined
use
proton
transfer
reaction-mass
spectrometry
(PTR-MS)
liquid
chromatography-mass
(GC-MS)
photochemical
smog
chamber
simulation
studies.
Currently,
require
time
advanced
experimental
skills
optimization
experiments
detect
broader
Online
face
such
as
poor
stability
limited
coverage.
In
studies,
is
heavily
both
system
itself.
Future
efforts
should
focus
improving
environmental
adaptability
automation
compound
techniques,
synergistic
developing
new
systems,
reducing
impact
itself
detection,
order
enhance
sensitivity,
selectivity,
resolution,
accuracy,
operability.
Язык: Английский
The Impacts of NO2 on Urban Air Quality and Cause for the Investigation of Its High Ambient Levels: Insights from a Relatively Long-Term Data Analysis in a Typical Petrochemical City in the Bohai Bay Region, China
Toxics,
Год журнала:
2025,
Номер
13(3), С. 208 - 208
Опубликована: Март 13, 2025
The
ambient
levels
of
NO2
in
urban
areas
China
recent
years
have
generally
shown
a
downward
trend,
but
high
concentrations
still
exist
under
certain
conditions,
and
the
causes
for
such
phenomenon
its
impact
on
air
quality
remain
unclear.
Taking
Dongying,
typical
petrochemical
city
Bohai
Bay
China,
as
an
example,
this
paper
analyzed
influence
investigated
formation
with
concentrations.
results
indicated
that
higher
daily
(>40
μg/m3)
mainly
occurred
during
January-April
September-December
each
year,
hourly
nighttime
morning
rush
hour
Dongying
from
2017
to
2023.
With
increase
concentrations,
pollution
showed
general
increasing
trend
occurrence
values
was
affected
by
combination
unfavorable
meteorological
local
emissions
regional
transports,
localized
atmospheric
chemical
generation.
High-pressure
uniform-pressure
weather
patterns
2017–2022,
along
land–sea
breeze
circulation
2022,
contribute
Dongying.
Boundary
layer
heights
(BLH)
spring
(−0.43)
winter
(−0.36),
wind
direction
summer
(0.21),
temperature
autumn
(−0.46)
are
primary
factors
driving
NO2-HH
(High
values),
while
BLH
(−0.47)
is
main
cause
NO2-HD
values).
titration
reaction
between
NO
O3
spring,
autumn,
photochemical
reactions
aromatics
significant
NO2-HD.
NOx
thermal
power
industry
transports
western
southwestern
Shandong
Province
(throughout
year)
Sea
(during
summer)
had
serious
adverse
2022.
study
could
help
provide
scientific
basis
control
continuous
improvement
similar
cities.
Язык: Английский
A Comparative Investigation on the Characteristics of Nocturnal Ozone Enhancement Events and Their Effects on Ground-level Ozone and PM2.5 in the Central City of the Yellow River Delta, China, in 2022 and 2023
Опубликована: Фев. 6, 2024
In
recent
years,
nocturnal
ozone
enhancement(NOE)
events
have
become
a
hot
research
topic
in
the
field
of
atmospheric
environment.
By
using
statistically-based
data
analysis,
we
made
comparative
investigation
about
concentrations
and
NOE
2022
2023,
further
explored
effects
on
O3
PM2.5
at
night
same
day
next
day.
The
results
showed
that
from
to
2023
Dongying,
annual
average
increased
51
μg/m3
59
μg/m3,
frequency
was
higher
spring,
summer
autumn,
lower
winter.
not
only
had
an
obvious
promoting
effect
Ox,
daily
maximum
8
h
concentration
(MDA8-O3)
(more
apparent
autumn),
PM2.5-bounded
NO3-
SO42-
winter),
but
also
distinct
influence
O3,
Ox
MDA8-O3
summer).
could
strengthen
understanding
phenomena
events,
provide
scientific
basis
for
collaborative
control
urban
areas
Yellow
River
Delta,
China.
Язык: Английский
Characterization and Atmospheric Drivers of Nocturnal Ozone Enhancement in Putian City, China
Atmosphere,
Год журнала:
2025,
Номер
16(1), С. 45 - 45
Опубликована: Янв. 3, 2025
The
increasingly
severe
nocturnal
ozone
enhancement
(NOE)
event
pollution
is
widely
concerning.
Therefore,
based
on
the
observed
hourly
O3
concentrations
from
2015
to
2023,
this
study
analyzes
characteristics
of
NOE
events
over
Putian
City.
analysis
results
show
that
frequency
City
high,
at
about
127
days
annually,
with
a
high
in
April
and
low
July
August.
Most
corresponded
peak
concentration
(NOP)
<120
μg/m3.
Moreover,
they
mainly
occurred
between
1:00–3:00
7:00.
physicochemical
processes
April,
October,
November
2020
were
simulated
using
Weather
Research
Forecasting
(WRF,
version
4.3.3)
model
coupled
Community
Multiscale
Air
Quality
(CMAQ,
5.4)
model.
suggest
transport,
especially
horizontal
transport
eastern
sea
Zhejiang
Province
vertical
upper
atmosphere,
could
be
major
cause
Furthermore,
movement
zone,
along
aggregation
due
weakened
dry
deposition
influence
stable
boundary
layer
obstructed
by
mountain
terrain,
significantly
influenced
overall
concentration.
Thus,
stem
interaction
among
these
processes.
emphasize
importance
control
implementation
strict
joint
regional
measures
for
improve
air
quality.
Язык: Английский