Atmosphere,
Journal Year:
2024,
Volume and Issue:
15(1), P. 115 - 115
Published: Jan. 18, 2024
In
this
study,
we
reviewed
smog
chamber
systems
and
methodologies
used
in
secondary
organic
aerosol
(SOA)
formation
studies.
Many
important
chambers
across
the
world
have
been
reviewed,
including
18
American,
24
European,
8
Asian
chambers.
The
characteristics
of
(location,
reactor
size,
wall
materials,
light
sources),
measurement
(popular
equipment
working
principles),
(SOA
yield
calculation
wall-loss
correction)
are
summarized.
This
review
discussed
key
experimental
parameters
such
as
surface-to-volume
ratio
(S/V),
temperature,
relative
humidity,
intensity,
effect
that
influence
results
experiment,
how
evolved
for
more
accurate
simulation
atmospheric
processes.
addition,
identifies
sources
uncertainties
finding
SOA
yields
originated
from
previous
intensity
installed
artificial
lights
(photolysis
rate
NO2
varied
0.1/min
to
0.40/min),
density
assumption
(varied
1
g/cm3
1.45
g/cm3),
management,
background
contaminants
were
identified
uncertainty.
developed
studies
minimize
those
also
discussed.
Analytical Chemistry,
Journal Year:
2022,
Volume and Issue:
94(10), P. 4286 - 4293
Published: March 4, 2022
Benzene,
toluene,
and
xylene
(BTX)
are
serious
air
pollutants
emitted
by
the
chemical
industry.
Real-time
monitoring
of
these
would
be
a
valuable
tool
to
regulate
emissions
compounds
reduce
harm
they
cause
human
health.
Here,
we
demonstrate
first
detection
BTX
using
incoherent
broadband
cavity-enhanced
absorption
spectroscopy
(IBBCEAS).
The
instrument
was
operated
in
deep-ultraviolet
spectral
region
between
252
286
nm,
where
aromatic
have
intense
π
→
π*
bands.
mirror
reflectivity
calibrated
two
methods
exceeded
99.63%
at
266
nm.
At
an
integration
time
60
s,
1σ
measurement
sensitivities
were
estimated
7.2
ppbv
for
benzene,
21.9
10.2
m-xylene,
4.8
p-xylene,
respectively.
cross
sections
measured
this
work
with
uncertainty
10.0%
resolution
0.74
reported
good
agreement
those
from
earlier
studies
after
accounting
differences
resolution.
To
ability
quantify
complex
mixtures,
concentrations
m-xylene
p-xylene
been
retrieved
under
five
different
mixing
ratios.
Instrumental
improvements
measurements
strategies
use
applications
discussed.
Environmental Science Processes & Impacts,
Journal Year:
2022,
Volume and Issue:
24(3), P. 351 - 379
Published: Jan. 1, 2022
This
review
summarizes
in
detail
the
current
knowledge
chemical
compositions,
formation
mechanisms,
and
physicochemical
properties
of
secondary
organic
aerosols
formed
from
monocyclic
aromatic
hydrocarbons.
Atmosphere,
Journal Year:
2024,
Volume and Issue:
15(1), P. 115 - 115
Published: Jan. 18, 2024
In
this
study,
we
reviewed
smog
chamber
systems
and
methodologies
used
in
secondary
organic
aerosol
(SOA)
formation
studies.
Many
important
chambers
across
the
world
have
been
reviewed,
including
18
American,
24
European,
8
Asian
chambers.
The
characteristics
of
(location,
reactor
size,
wall
materials,
light
sources),
measurement
(popular
equipment
working
principles),
(SOA
yield
calculation
wall-loss
correction)
are
summarized.
This
review
discussed
key
experimental
parameters
such
as
surface-to-volume
ratio
(S/V),
temperature,
relative
humidity,
intensity,
effect
that
influence
results
experiment,
how
evolved
for
more
accurate
simulation
atmospheric
processes.
addition,
identifies
sources
uncertainties
finding
SOA
yields
originated
from
previous
intensity
installed
artificial
lights
(photolysis
rate
NO2
varied
0.1/min
to
0.40/min),
density
assumption
(varied
1
g/cm3
1.45
g/cm3),
management,
background
contaminants
were
identified
uncertainty.
developed
studies
minimize
those
also
discussed.
