Chemical Communications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
This
feature
article
focuses
on
classifying
pollutants
that
degrade
indoor
air
quality
(IAQ)
and
highlights
next-generation
nanofilter
technologies
to
address
them.
Environmental Science & Technology,
Journal Year:
2025,
Volume and Issue:
59(2), P. 1133 - 1144
Published: Jan. 7, 2025
Airborne
Staphylococcus
aureus
exists
widely
in
the
natural
environment
and
is
closely
related
to
human
health.
Growing
evidence
indicates
that
environmental
air
pollution
elevates
risk
of
depressive
disorders.
However,
potential
role
airborne
S.
development
depression
remains
unclear.
This
study
aims
elucidate
neurotoxic
effects
mechanisms
associated
with
caused
by
aureus.
Mice
were
randomly
divided
into
four
groups,
experimental
groups
at
4.89
×
102,
8.89
105,
1.27
108
CFU/m3
during
consecutive
weeks.
exposure
contributed
depression-like
behaviors
mice,
especially
high-concentration
group.
The
electroencephalography
signal
analysis
identified
uncoupling
theta
gamma
bands
a
shift
beta
rhythm
toward
delta
oscillation
medial
prefrontal
cortex
mice.
Neuropathological
showed
uplifted
neuroinflammation
elevated
levels
oxidative
stress
brain.
Neuroinflammation
resulted
mitochondrial
dysfunction,
which
could
lead
apoptosis.
Together,
this
provides
strong
basis
for
understanding
adverse
outcomes
on
mental
health
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(3)
Published: March 1, 2025
This
study
investigates
the
effect
of
natural
ventilation
on
distribution
airborne
pathogens
in
narrow,
low-ceiling
corridors
typical
hotels,
offices,
or
cruise
ships.
Two
scenarios
are
examined:
a
milder
cough
at
6
m/s
and
stronger
12
m/s.
A
reference
baseline
case
with
no
airflow
is
compared
to
cases
featuring
an
incoming
velocity
1
(3.6
km/h),
examining
differences
dispersal
respiratory
droplets
from
two
individuals
coughing
spaced
5
meters
apart.
Both
direction
airflow,
assuming
one-way
traffic
minimize
pathogen
transmission.
Findings
indicate
that
accelerates
past
door,
exceeding
3
m/s,
gusts
reaching
4
due
interaction
recirculation
zones.
acceleration
affects
droplet
dispersal.
Larger
(>150
μm)
maintain
ballistic
trajectory,
traveling
2–4
m,
potentially
increasing
transmission
risk
but
suggesting
5-m
distancing
policy
could
suffice
for
protection.
Smaller
(<150
μm),
especially
those
<100μm,
spread
extensively
regardless
strength
while
containing
most
viral
mass
overall.
Thus,
alone
insufficient.
The
recommends
additional
safety
measures
be
enforced,
such
as
wearing
masks,
stricter
usage
protocols
by
limiting
corridor
use
one
person
every
20–30
s,
eliminating
when
feasible
effectively
mitigate
risks
environments.
Airborne
pathogens
and
antimicrobial
resistance
(AMR)
present
significant
global
health
threats.
Household
waste
collection
facilities
(WCFs),
crucial
initial
nodes
in
urban
management
systems,
have
been
understudied
regards
to
their
role
emitting
these
hazards.
This
study
investigated
the
abundance,
composition,
sources,
driving
mechanisms,
risks
associated
with
AMR
originating
from
WCFs
a
major
city,
using
culture-based
analysis,
high-throughput
sequencing,
risk
modeling,
respectively.
The
atmospheric
escape
rates
of
culturable
bacteria
(43.4%),
fungi
(71.7%),
antibiotic-resistant
(ARB)
(43.7%)
were
estimated
based
on
concentration
differences
between
interior
exterior
by
SourceTracker2
analysis.
Health
assessments
showed
that
annual
infection
for
waste-handling
workers
ranged
0.194
0.489,
far
exceeding
World
Organization's
acceptable
limit
10-4.
Community
exposure
notable
up
220
m
downwind
WCFs,
marking
maximum
extent
pathogen
dispersion.
Our
analysis
suggests
approximately
6.3%
megacity's
area
(equivalent
400
km2)
is
within
potential
zones
influenced
WCF
emissions.
These
results
underscore
critical
need
evaluate
mitigate
public
posed
airborne
emitted
megacities
globally.