Aerosol Science and Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 20, 2024
Language: Английский
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: Jan. 13, 2025
Abstract
The
rapid
development
of
low-cost
sensors
provides
the
opportunity
to
greatly
advance
scope
and
extent
monitoring
indoor
air
pollution.
In
this
study,
calibrated
particle
matter
(PM)
a
non-negative
matrix
factorisation
(NMF)
source
apportionment
technique
are
used
investigate
PM
concentrations
contributions
across
three
households
in
an
urban
residential
area.
NMF
is
applied
combined
data
from
all
houses
generate
profiles
that
can
be
understand
how
characteristics
similar
or
differ
between
different
same
2.5
10
were
greater,
more
variable,
significantly
ambient
recorded
at
nearby
site.
Concentrations
also
houses,
with
World
Health
Organisation
24-h
guideline
limits
for
breached
one
household.
methodology
was
highly
successful
modelling
(R
2
$$\ge$$
Language: Английский
Citations
2
Heliyon, Journal Year: 2024, Volume and Issue: 10(9), P. e29772 - e29772
Published: April 24, 2024
The pressing issue of atmospheric pollution has prompted the exploration affordable methods for measuring and monitoring air contaminants as complementary techniques to standard methods, able produce high-density data in time space. main challenge this low-cost approach regards in-field accuracy reliability sensors. This study presents development stations high-time resolution measurements CO
Language: Английский
Citations
4
Atmospheric Environment, Journal Year: 2024, Volume and Issue: 331, P. 120564 - 120564
Published: May 8, 2024
Language: Английский
Citations
4
Environments, Journal Year: 2024, Volume and Issue: 11(11), P. 237 - 237
Published: Oct. 28, 2024
Indoor air quality (IAQ) poses a significant public health concern, and exposures to high levels of fine particulate matter (PM2.5) carbon dioxide (CO2) could have detrimental impacts. This study focused on assessing the indoor pollutants in residential house located town Mission, Hidalgo County, South Texas, USA. The PM2.5 CO2 were monitored indoors: kitchen bedroom. investigation also aimed elucidate effects household activities such as cooking human occupancy these pollutants. Low-cost sensors (LCSs) from TSI AirAssure™ used this study. They deployed within breathing zone at approximately 1.5 m above ground. Calibration low-cost against Federal Equivalent Method (FEM) instruments was undertaken using multiple linear regression method (MLR) model improve data accuracy. significantly influenced by activities, with peak concentrations reaching up 118.45 μg/m3. bedroom increased during occupant’s sleeping period, 1149.73 ppm. risk assessment assessed through toxicity potential (TP) calculations for concentrations. TP values 0.21 0.20 obtained bedroom, respectively. below hazard threshold (i.e., < 1). These low be attributed use electric stoves efficient ventilation systems. research highlights effectiveness continuous IAQ monitoring helps promote better awareness necessary interventions salubrious microenvironments.
Language: Английский
Citations
4
ACS ES&T Air, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
With increasing wildfire events impacting many regions worldwide, understanding and mitigating the effects of smoke on indoor air quality (IAQ) in public buildings are essential for protecting occupant health. This study investigated impact IAQ across 24 campus Alberta, Canada, representing spaces with varied ventilation systems. Using a network low-cost sensors to monitor PM2.5, identified significant spikes during events, 71% exceeding Canadian Ambient Air Quality Standards daily limit 27 μg/m3. The had mechanical systems filters different Minimum Efficiency Reporting Value (MERV) ratings. MERV13 were found be more efficient at capturing PM2.5 particles, resulting lower indoor/outdoor ratios (0.12 ± 0.07) compared MERV8 (0.28 0.14). Buildings change rates (ACH) ranging from 5 15 per hour exhibited infiltration patterns, higher ACH generally leading elevated concentrations events. highlights need balance pollutant by optimizing filtration efficiency reduce PM2.5. trajectory-fire interception method, combined satellite data, enhanced identification wildfire-influenced periods, contributing better dynamics. These findings underscore that even advanced alone may not ensure healthy extreme pollution. Real-time measurements crucial effective management. offer valuable insights building administrators policymakers, helping them develop strategies mitigate support healthier environments seasons.
Language: Английский
Citations
0
Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(29), P. 10604 - 10614
Published: July 14, 2023
Exposure to air pollution is a leading risk factor for disease and premature death, but technologies assessing personal exposure particulate gaseous pollutants, including the timing location of such exposures, are limited. We developed small, quiet, wearable monitor, called AirPen, quantify exposures fine matter (PM
Language: Английский
Citations
7
Atmospheric Environment X, Journal Year: 2024, Volume and Issue: 22, P. 100271 - 100271
Published: April 1, 2024
Low-cost sensors (LCS) have the potential to provide accurate and reliable measurements of air quality in real-time. This improves our ability monitor, identify sources pollution develop mitigation strategies for effective management. However, recent research on LCS has primarily focused monitoring, exposure assessment, calibration. In this study, we investigate applicability data collected at ambient sites characterizing apportioning aerosol sources. Non-negative matrix factorization (NMF) was applied size-resolved across five within Indian Institute Technology Bombay (IITB) campus Mumbai using Alphasense OPC-N2. The sampling done 15 days 5 locations IITB, each site only had 3 data. NMF resolved two factors three sites, namely aromas (S2), hostel hub (S3) central library (S4), while were construction (S1) main gate (S5). Two common determined all sites: (i) dust marine source (ii) traffic combustion sources, which agree with identified by studies literature. third factor S1 S5 is representative heavy-duty diesel vehicles (HDDVs), present a very short period captured because capability high temporal resolution LCS. offers unique, cost-effective advantage capturing episodic activities. study suggests that low- middle-income countries limited monitoring capabilities, size-time-resolved PM concentration obtained from network low-cost can estimate provided evidence despite their inherent limitations, be useful attaining interpretable information about recommends extensive use characterization future.
Language: Английский
Citations
1
Environmental Technology & Innovation, Journal Year: 2024, Volume and Issue: 36, P. 103773 - 103773
Published: Aug. 3, 2024
Indoor poultry facilities often experience poor air quality due to intensive farming and restricted ventilation. Monitoring the in these barns is crucial considering health of both birds producers. Advancements sensor technologies have led development low-cost sensors (LCS) that can continuously monitor pollutants. Even though most Canada are indoors harsh winter weather conditions, there a lack indoor (IAQ) studies. This study aimed evaluate field performance LCS network table egg farm Canada, where were designed specifically for operating dusty continuously. The monitored IQA parameters such as particulate matter (PM), carbon dioxide (CO2), relative humidity, temperature real-time. By implementing correction factor, data resulted an agreement range 80 ± 20% with reference instrument. observed PM concentration exceeded several thousand μg/m3, PM10 at 5.5 × 104 2.2 PM2.5 6.3 103 2.3 103, which was found be affected by chicken activity light regime. IAQ also exhibited complex intercorrelation each other, well outdoor building ventilation rate. Sensors able make observations only research-grade instruments previous Overall, showcases potential affordable solution environmental monitoring facilities.
Language: Английский
Citations
1
Applied System Innovation, Journal Year: 2023, Volume and Issue: 6(4), P. 69 - 69
Published: Aug. 8, 2023
The measurement and assessment of indoor air quality in terms respirable particulate constituents is relevant, especially light the COVID-19 pandemic associated infection events. To analyze infectious potential to develop customized hygiene concepts, monitoring anthropogenic aerosol spreading necessary. For measurements usually standard lab equipment used. However, these devices are time-consuming, expensive unwieldy. idea replace this laboratory with low-cost sensors widely used for fine dust (particulate matter—PM). Due low acquisition costs, many can be determine load, even large rooms. Thus, aim work verify capability sensors. purpose, two different models compared established measuring instruments. study was performed artificially prepared NaCl aerosols a well-defined size morphology. In addition, influence relative humidity, which vary significantly indoors, on investigated. heating stage developed tested. results show discrepancy between This difference attributed partially method, as well particle ranges. determined accuracy nevertheless good, considering compactness price
Language: Английский
Citations
3
Aerosol Science and Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 20, 2024
Language: Английский
Citations
0