Indoor Air,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
Given
that
people
spend
on
average
more
than
80%
of
their
time
indoors,
monitoring
indoor
air
quality
(IAQ)
is
the
utmost
importance
for
safeguard
human
health.
Indeed,
due
to
penetration
from
outdoors
and
presence
specific
sources,
poor
IAQ
not
uncommon.
The
use
portable
cleaners
(PACs)
one
many
options
improve
IAQ.
market
offers
products,
but
all
them
have
reliable
documentation
effectiveness.
Literature
standard
methods
testing
PACs
toward
pollutants
require
extensive
resources.
In
this
work,
we
developed
a
new
laboratory
scale
methodology
based
small,
easy
use,
economical
batch
system
test
efficiency
PACs.
With
method,
three
commercial
were
successfully
tested
effectiveness
volatile
organic
compounds
(VOCs)
particulate
matter
(PM).
method
proved
successful,
results
highlighted
conducting
these
tests,
in
addition
field
investigations.
Environmental Research,
Journal Year:
2024,
Volume and Issue:
261, P. 119713 - 119713
Published: July 31, 2024
Indoor
air
quality
(IAQ)
in
educational
facilities
is
crucial
due
to
the
extended
time
students
spend
those
environments,
affecting
their
health,
academic
performance,
and
attendance.
This
paper
aimed
review
relevant
parameters
(building
characteristics
factors
related
with
occupancy
activities)
for
assessing
IAQ
facilities,
identify
consider
when
performing
an
monitoring
campaign
schools.
It
also
intended
literature
gaps
suggest
future
research
directions.
A
narrative
was
conducted,
focusing
on
seven
key
parameters:
building
location,
layout
construction
materials,
ventilation
cleaning
systems,
finishing
occupant
demographics,
occupancy,
activities.
The
findings
revealed
that
carbon
dioxide
(CO2)
levels
were
predominantly
influenced
by
classroom
rates,
while
particulate
matter
(PM)
concentrations
significantly
building's
design,
Furthermore,
this
highlighted
presence
of
other
pollutants,
such
as
trace
metals,
polycyclic
aromatic
hydrocarbons
(PAHs),
monoxide
(CO),
nitrogen
(NO2),
ozone
(O3),
radon,
linking
them
specific
within
school
environment.
Different
patterns,
consequently
different
parameters,
observed
various
areas,
including
classrooms,
canteens,
gymnasiums,
computer
rooms,
laboratories.
While
substantial
exists
schools,
significant
still
remain.
study
need
more
studies
middle
high
well
indoor
microenvironments
settings
beyond
classrooms.
Additionally,
it
underscored
comprehensive
exposure
assessments,
long-term
studies,
impacts
new
materials
effects
secondary
reactions
surfaces.
Seasonal
variations
implications
emerging
technologies
identified
requiring
further
investigation.
Addressing
through
targeted
considering
most
updated
standards
guidelines
IAQ,
could
lead
define
effective
strategies
improving
safeguarding
students'
health
performance.
ACS ES&T Air,
Journal Year:
2024,
Volume and Issue:
1(12), P. 1696 - 1705
Published: Oct. 28, 2024
Ionization
treatment
of
indoor
air
has
attracted
attention
for
its
potential
to
inactivate
airborne
pathogens
and
reduce
disease
transmission,
yet
real-world
effectiveness
remains
unverified.
We
evaluated
the
impact
an
in-duct,
bipolar
ionization
system
on
particles,
including
culturable
bacteria,
in
a
lecture
hall.
The
ionizer
was
off
with
variable
fan
speed
1
week,
second
high
constant
third
week.
measured
ion
concentrations
aerosol
particle
concentrations,
we
collected
bioaerosol
samples
analysis
16S
rRNA
gene
copies
representing
total
bacteria
colony
forming
units
(CFUs)
Tryptic
Soy
Agar
bacteria.
There
were
no
significant
differences
positive,
in-room
between
any
weeks;
however,
negative,
significantly
lower
when
speed.
To
account
day-to-day
variability
related
occupancy
other
factors,
examined
ratio
CFUs
(CFU
gc–1)
found
whether
or
off.
This
result
indicates
that
not
effective
at
reducing
levels
this
study.
Building and Environment,
Journal Year:
2024,
Volume and Issue:
257, P. 111540 - 111540
Published: April 16, 2024
The
use
of
air
cleaners
to
enhance
indoor
quality
under
reduced
ventilation
for
energy
conservation
has
increasingly
garnered
attention.
However,
the
effects
on
removal
gaseous
compounds
require
further
research.
Reduced
can
increase
pollution
caused
by
emissions
from
humans
(bioeffluents);
however,
little
is
known
about
performance
regarding
this
type
pollution.
Thus,
study
addressed
gap.
Two
male
participants
sitting
in
a
stainless-steel
chamber
served
as
source
bioeffluents
at
two
temperatures
(23oC
and
28oC),
gas-phase
cleaner
was
either
operational
or
idled.
Thirteen
evaluated
quality,
chemical
analyses
were
performed.
protocols
partially
followed
ISO
Standards
16000-28
16000-44.
results
indicate
that
pollutants
emitted
decreased
when
operating.
In
addition,
sensory
assessments
showed
decrease
odour
intensity
percentage
dissatisfaction
with
operating
cleaner.
clean
delivery
rate
higher
28ºC,
perceived
freshness
also
improved
temperature.
Our
findings
show
operations
effectively
improve
polluted
human
bioeffluents.
validation
actual
environments
recommended.
