Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Nov. 12, 2022
Abstract
Ammonium
salt
is
an
important
component
of
particulate
matter
with
aerodynamic
diameter
less
than
2.5
µm
(PM
)
and
has
significant
impacts
on
air
quality,
climate,
natural
ecosystems.
However,
a
fundamental
understanding
the
conversion
kinetics
from
ammonia
to
ammonium
in
unique
environments
high
aerosol
loading
lacking.
Here,
we
report
uptake
coefficient
(γ
NH3
ambient
PM
varying
2.2
×
10
−4
6.0
North
China
Plain.
It
significantly
lower
those
model
particles
under
simple
conditions
reported
literature.
The
probability-weighted
γ
increases
obviously,
which
well
explained
by
annual
decrease
pH
due
decline
alkali
earth
metal
contents
emission
source
dust.
Our
results
elaborate
complex
interactions
between
primary
emissions
secondary
formation
aerosols
role
dust
atmospheric
chemistry.
Environmental Science & Technology,
Journal Year:
2021,
Volume and Issue:
55(8), P. 4227 - 4242
Published: March 24, 2021
Atmospheric
oxidation
of
sulfur
dioxide
(SO2)
forms
sulfate-containing
aerosol
particles
that
impact
air
quality,
climate,
and
human
ecosystem
health.
It
is
well-known
in-cloud
SO2
frequently
dominates
over
gas-phase
on
regional
global
scales.
Multiphase
involving
particles,
fog,
cloud
droplets
has
been
generally
thought
to
scale
with
liquid
water
content
(LWC)
so
multiphase
would
be
negligible
for
due
their
low
LWC.
However,
recent
field
evidence,
particularly
from
East
Asia,
shows
fast
sulfate
formation
prevails
in
cloud-free
environments
are
characterized
by
high
loadings.
By
assuming
the
kinetics
chemistry
most
atmospheric
models
do
not
capture
this
phenomenon.
Therefore,
blossomed
past
decade,
many
processes
proposed
bridge
difference
between
modeled
observed
mass
This
review
summarizes
advances
fundamental
understanding
SO2,
a
focus
environmental
conditions
affect
rate,
experimental
challenges,
mechanisms
results
individual
reaction
pathways,
future
research
directions.
Compared
dilute
conditions,
paper
highlights
differences
arise
at
molecular
level
extremely
solute
strengths
present
particles.
Atmospheric chemistry and physics,
Journal Year:
2021,
Volume and Issue:
21(17), P. 13483 - 13536
Published: Sept. 10, 2021
Abstract.
The
acidity
of
aqueous
atmospheric
solutions
is
a
key
parameter
driving
both
the
partitioning
semi-volatile
acidic
and
basic
trace
gases
their
aqueous-phase
chemistry.
In
addition,
phases,
e.g.,
deliquesced
aerosol
particles,
cloud,
fog
droplets,
also
dictated
by
These
feedbacks
between
chemistry
have
crucial
implications
for
tropospheric
lifetime
air
pollutants,
composition,
deposition
to
terrestrial
oceanic
ecosystems,
visibility,
climate,
human
health.
Atmospheric
research
has
made
substantial
progress
in
understanding
multiphase
during
recent
decades.
This
paper
reviews
current
state
knowledge
on
these
with
focus
cloud
systems,
which
involve
inorganic
organic
Here,
we
describe
impacts
phase
buffering
phenomena.
Next,
review
different
regimes
chemical
reaction
mechanisms
kinetics,
as
well
uncertainties
subsystems
incomplete
information.
Finally,
discuss
highlight
need
future
investigations,
particularly
respect
reducing
emissions
acid
precursors
changing
world,
advancements
field
laboratory
measurements
model
tools.
Environmental Science Processes & Impacts,
Journal Year:
2020,
Volume and Issue:
22(8), P. 1616 - 1653
Published: Jan. 1, 2020
Aerosol
mass
spectrometer
has
been
widely
deployed
in
Asia
for
real-time
characterization
of
aerosol
chemistry,
and
significantly
improved
our
understanding
the
sources,
properties,
formation
processes
aerosols
a
complex
environment.
Geophysical Research Letters,
Journal Year:
2020,
Volume and Issue:
47(5)
Published: Feb. 29, 2020
Abstract
Submicron
aerosol
(PM
1
)
species
measured
by
mass
spectrometers
have
been
widely
used
to
validate
chemical
transport
models;
however,
the
uncertainties
due
differences
between
PM
and
2.5
are
poorly
constrained.
Here
we
characterized
such
in
a
highly
polluted
environment
north
China
winter.
Our
results
showed
that
changes
/PM
ratios
as
function
of
relative
humidity
(RH)
were
largely
different
for
primary
secondary
species.
Secondary
organic
inorganic
(SOA
SIA)
presented
clear
decreases
at
RH
>
60%
during
periods
with
high
SIA
contributions
(>50%),
likely
driven
hygroscopicity
phase
states,
while
traffic
coal
combustion
OA
had
limited
dependence
on
RH.
Thermodynamic
modeling
negligible
impacts
predictions
particle
acidity,
yet
these
can
cause
difference
water
content
up
50–70%.
Fundamental Research,
Journal Year:
2021,
Volume and Issue:
2(4), P. 578 - 587
Published: Dec. 2, 2021
Deliquescence
relative
humidity
(DRH)
and
efflorescence
(ERH),
the
two
parameters
that
regulate
phase
state
hygroscopicity
of
substances,
play
important
roles
in
atmospheric
science
many
other
fields.
A
large
number
experimental
studies
have
measured
DRH
ERH
values
compounds
with
relevance,
but
these
not
yet
been
summarized
a
comprehensive
manner.
In
this
work,
we
develop
for
first-of-its-kind
database
which
compiles
110
(68
inorganics
42
organics)
previous
studies,
provide
preferred
at
298
K
compounds,
discuss
effects
few
key
factors
(e.g.,
temperature
particle
size)
on
values.
addition,
outline
future
work
will
broaden
scope
enhance
its
accessibility.
