Resuspension of Indoor Particles Due to Human Foot Motion

Benabed, Ahmed; Limam, Karim

doi:10.1016/j.egypro.2017.11.203

Cited by 20 publications

(11 citation statements)

References 19 publications

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“…The spatial and temporal variations in PM 2.5 concentrations are explained by indoor environmental conditions, such as building characteristics, interior materials, occupant window-opening activities, indoor source emissions and ventilation systems [ 33 , 34 ]. PM 2.5 concentrations increase when people are present in a room and with human activity, including the resuspension of deposited particles due to human movements [ 35 ]. Dental offices presented higher PM 2.5 concentrations, probably associated with the dental treatments performed which include aerosol-generating procedures [ 27 , 29 , 36 ].…”

Section: Discussionmentioning

confidence: 99%

“…Concerning PM 2.5 , it is recommended to perform regular cleaning of the floors and the surfaces to limit the quantity of deposited particles [ 11 ], which can be resuspended by human movements [ 35 ]. Regarding TVOCs, the use of dental materials in the dental treatment room and the use of cleaning and disinfecting products in all the healthcare and care facilities was a major source of VOCs, but this cannot be reduced.…”

Section: Discussionmentioning

confidence: 99%

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Indoor Carbon Dioxide, Fine Particulate Matter and Total Volatile Organic Compounds in Private Healthcare and Elderly Care Facilities

Baudet

Baurès

Blanchard

et al. 2022

Toxics

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Poor indoor air quality can have adverse effects on human health, especially in susceptible populations. The aim of this study was to measure the concentrations of dioxide carbon (CO2), fine particulate matter (PM2.5) and total volatile organic compounds (TVOCs) in situ in private healthcare and elderly care facilities. These pollutants were continuously measured in two rooms of six private healthcare facilities (general practitioner’s offices, dental offices and pharmacies) and four elderly care facilities (nursing homes) in two French urban areas during two seasons: summer and winter. The mean CO2 concentrations ranged from 764 ± 443 ppm in dental offices to 624 ± 198 ppm in elderly care facilities. The mean PM2.5 concentrations ranged from 13.4 ± 14.4 µg/m3 in dental offices to 5.7 ± 4.8 µg/m3 in general practitioner offices. The mean TVOC concentrations ranged from 700 ± 641 ppb in dental offices to 143 ± 239 ppb in general practitioner offices. Dental offices presented higher levels of indoor air pollutants, associated with the dental activities. Increasing the ventilation of these facilities by opening a window is probably an appropriate method for reducing pollutant concentrations and maintaining good indoor air quality.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Indoor Carbon Dioxide, Fine Particulate Matter and Total Volatile Organic Compounds in Private Healthcare and Elderly Care Facilities

Baudet

Baurès

Blanchard

et al. 2022

Toxics

View full text Add to dashboard Cite

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“…Similarly to CO 2 , PM 2.5 may vary in link to ventilation capacities and human activities. PM 2.5 concentrations increase, respectively, when people are present in a room and with human activity, including the resuspension of deposited particles due to human movements [19]. Indoor PM 2.5 concentrations are also affected by the infiltration of outdoor PM 2.5 [31]; they come from outside traffic [17,18].…”

Section: Particulate Matter (Pm 25 )mentioning

confidence: 99%

“…They may also be emitted from building materials and the outdoor environment [17,18]. The level of PM in the air can be affected by humans walking indoors [19] as well as by outdoor air [18]. PM, including fine particles less than 2.5 µm in diameter (PM 2.5 ), is a risk factor for mortality and morbidity [20].…”

Section: Introductionmentioning

confidence: 99%

Indoor Air Quality in Healthcare and Care Facilities: Chemical Pollutants and Microbiological Contaminants

et al. 2021

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The indoor air quality of healthcare and care facilities is poorly studied. The aim of this study was to qualitatively and quantitatively describe the chemical pollution and the microbiological contaminations of the indoor environment of these facilities. Methods: A wide range of chemical compounds (39 volatile and 13 semi-volatile organic compounds, carbon dioxide, fine particulate matter) and microorganisms (fungi and bacteria) were studied. Sampling campaigns were conducted in two French cities in summer 2018 and winter 2019 in six private healthcare facilities (general practitioner’s offices, dental offices, pharmacies) and four care facilities (nursing homes). Results: The highest median concentrations of chemical compounds (μg/m3) were measured for alcohols (ethanol: 378.9 and isopropanol: 23.6), ketones (acetone: 18.8), aldehydes (formaldehyde: 11.4 and acetaldehyde: 6.5) and terpenes (limonene: 4.3). The median concentration of PM2.5 was 9.0 µg/m3. The main bacteria of these indoor environments were Staphylococcus, Micrococcus and Bacillus genera, with median bacterial concentrations in the indoor air of 14 cfu/m3. The two major fungal genera were Cladosporium and Penicillium, with median fungal concentrations of 7 cfu/m3. Conclusions: Indoor air in healthcare and care facilities contains a complex mixture of many pollutants found in higher concentrations compared to the indoor air in French hospitals in a previous study.

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“…Their results illustrate that shoe bottom roughness, foot size, walking velocity, background velocity, foot stepping velocities, all affect particle resuspension rate from the floor and the corresponding particle concentrations in the indoor environment. Benabed et al [13] study particle resuspension in the indoor environment due to human activity. Thus, the research uses an environmentally controlled experimental chamber to measure the particle matter (PM) using an optical particle counters (Grimm 1.108) and considering only the downward motion of the foot during the gait cycle.…”

Section: Related Workmentioning

confidence: 99%

Indoor Air Quality Monitoring Using Infrastructure-Based Motion Detectors

Motlagh

Nurmi

Tarkoma

et al. 2019

2019 IEEE 17th International Conference on Industrial Informatics (INDIN)

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Poor indoor air quality is a significant burden to society that can cause health issues and decrease productivity. According to research, indoor air quality is intrinsically linked with human activity and mobility. Indeed, mobility is directly linked with transfer of small particles (e.g. PM 2.5 ) and extent of activity affects production of CO 2 . Currently, however, estimation of indoor quality is difficult, requiring deployment of highly specialized sensing devices which need to be carefully placed and maintained. In this paper, we contribute by examining the suitability of infrastructure-based motion detectors for indoor air quality estimation. Such sensors are increasingly being deployed into smart environments, e.g., to control lighting and ventilation for energy management purposes. Being able to take advantage of these sensors would thus provide a cost-effective solution for indoor quality monitoring without need for deploying additional sensors. We perform a feasibility study considering measurements collected from a smart office environment having a dense deployment of motion detectors and correlating measurements obtained from motion detectors against air quality values. We consider two main pollutants, PM 2.5 and CO 2 , and demonstrate that there indeed is a connection between extent of movement and PM 2.5 concentration. However, for CO 2 , no relationship can be established, mostly due to difficulties in separating between people passing by and those residing long-term in the environment.

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Resuspension of Indoor Particles Due to Human Foot Motion

Cited by 20 publications

References 19 publications

Indoor Carbon Dioxide, Fine Particulate Matter and Total Volatile Organic Compounds in Private Healthcare and Elderly Care Facilities

Indoor Carbon Dioxide, Fine Particulate Matter and Total Volatile Organic Compounds in Private Healthcare and Elderly Care Facilities

Indoor Air Quality in Healthcare and Care Facilities: Chemical Pollutants and Microbiological Contaminants

Indoor Air Quality Monitoring Using Infrastructure-Based Motion Detectors

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