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Saidin H, Razak AA, Mohamad MF, Ul-Saufie AZ, Zaki SA, Othman N. Hazard Evaluation of Indoor Air Quality in Bank Offices. BUILDINGS 2023; 13:798. [DOI: 10.3390/buildings13030798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
IAQ is a crucial factor affecting the health, comfort, and productivity of workers, particularly those working in enclosed spaces like bank offices. This study aimed to evaluate the IAQ of a bank office’s operational area and vault by analyzing concentrations of CO2, TVOC, PM10, and PM2.5, as well as temperature, relative humidity, and air movement. Two different ventilation systems were compared to assess their impact on IAQ. The acquired data were statistically analyzed using mean comparison t-tests and hazard ratio analysis. The results revealed that indoor concentrations of PM2.5 and CO2 significantly contribute to the total hazard ratio, indicating the need to reduce their levels below reference values. The study also found that the ventilation system significantly affects indoor air quality, and concentrations of TVOC, CO2, PM10, and PM2.5 in the air are considerable. Significantly, the study found that bank offices with split unit air-conditioners had the highest mean CO2 levels, indicating poor ventilation. Overall, the study reveals that the building, activities, and ventilation in bank offices have a profound influence on IAQ parameters, primarily PM2.5 and CO2. Further research is required to formulate strategies for enhancing IAQ in these settings.
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Affiliation(s)
- Hamidi Saidin
- School of Mechanical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
- Department of Occupational Safety and Health, Ministry of Human Resources Malaysia, Presint 1, Putrajaya 62000, Wilayah Persekutuan Putrajaya, Malaysia
| | - Azli Abd Razak
- School of Mechanical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
| | - Mohd Faizal Mohamad
- School of Mechanical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
| | - Ahmad Zia Ul-Saufie
- School of Mathematical Sciences, College of Computing, Information and Media, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
| | - Sheikh Ahmad Zaki
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Nor’azizi Othman
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Wilayah Persekutuan Kuala Lumpur, Malaysia
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2
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Kumar P, Hama S, Abbass RA, Nogueira T, Brand VS, Wu HW, Abulude FO, Adelodun AA, Anand P, Andrade MDF, Apondo W, Asfaw A, Aziz KH, Cao SJ, El-Gendy A, Indu G, Kehbila AG, Ketzel M, Khare M, Kota SH, Mamo T, Manyozo S, Martinez J, McNabola A, Morawska L, Mustafa F, Muula AS, Nahian S, Nardocci AC, Nelson W, Ngowi AV, Njoroge G, Olaya Y, Omer K, Osano P, Sarkar Pavel MR, Salam A, Santos ELC, Sitati C, Shiva Nagendra SM. In-kitchen aerosol exposure in twelve cities across the globe. ENVIRONMENT INTERNATIONAL 2022; 162:107155. [PMID: 35278800 DOI: 10.1016/j.envint.2022.107155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/13/2022] [Accepted: 02/18/2022] [Indexed: 06/14/2023]
Abstract
Poor ventilation and polluting cooking fuels in low-income homes cause high exposure, yet relevant global studies are limited. We assessed exposure to in-kitchen particulate matter (PM2.5 and PM10) employing similar instrumentation in 60 low-income homes across 12 cities: Dhaka (Bangladesh); Chennai (India); Nanjing (China); Medellín (Colombia); São Paulo (Brazil); Cairo (Egypt); Sulaymaniyah (Iraq); Addis Ababa (Ethiopia); Akure (Nigeria); Blantyre (Malawi); Dar-es-Salaam (Tanzania) and Nairobi (Kenya). Exposure profiles of kitchen occupants showed that fuel, kitchen volume, cooking type and ventilation were the most prominent factors affecting in-kitchen exposure. Different cuisines resulted in varying cooking durations and disproportional exposures. Occupants in Dhaka, Nanjing, Dar-es-Salaam and Nairobi spent > 40% of their cooking time frying (the highest particle emitting cooking activity) compared with ∼ 68% of time spent boiling/stewing in Cairo, Sulaymaniyah and Akure. The highest average PM2.5 (PM10) concentrations were in Dhaka 185 ± 48 (220 ± 58) μg m-3 owing to small kitchen volume, extensive frying and prolonged cooking compared with the lowest in Medellín 10 ± 3 (14 ± 2) μg m-3. Dual ventilation (mechanical and natural) in Chennai, Cairo and Sulaymaniyah reduced average in-kitchen PM2.5 and PM10 by 2.3- and 1.8-times compared with natural ventilation (open doors) in Addis Ababa, Dar-es-Salam and Nairobi. Using charcoal during cooking (Addis Ababa, Blantyre and Nairobi) increased PM2.5 levels by 1.3- and 3.1-times compared with using natural gas (Nanjing, Medellin and Cairo) and LPG (Chennai, Sao Paulo and Sulaymaniyah), respectively. Smaller-volume kitchens (<15 m3; Dhaka and Nanjing) increased cooking exposure compared with their larger-volume counterparts (Medellin, Cairo and Sulaymaniyah). Potential exposure doses were highest for Asian, followed by African, Middle-eastern and South American homes. We recommend increased cooking exhaust extraction, cleaner fuels, awareness on improved cooking practices and minimising passive occupancy in kitchens to mitigate harmful cooking emissions.
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Affiliation(s)
- Prashant Kumar
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; Department of Civil, Structural & Environmental Engineering, Trinity College Dublin, Dublin, Ireland; School of Architecture, Southeast University, Nanjing, China.
| | - Sarkawt Hama
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom
| | - Rana Alaa Abbass
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom
| | - Thiago Nogueira
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; Departamento de Ciências Atmosféricas - Instituto de Astronomia, Geofísica e Ciências Atmosféricas - IAG, Universidade de São Paulo, São Paulo, Brazil
| | - Veronika S Brand
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; Departamento de Ciências Atmosféricas - Instituto de Astronomia, Geofísica e Ciências Atmosféricas - IAG, Universidade de São Paulo, São Paulo, Brazil
| | - Huai-Wen Wu
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; School of Architecture, Southeast University, Nanjing, China
| | | | - Adedeji A Adelodun
- Department of Marine Science and Technology, The Federal University of Technology Akure, 340001, Nigeria
| | - Partibha Anand
- Department of Civil Engineering, Indian Institute of Technology Delhi, India
| | - Maria de Fatima Andrade
- Departamento de Ciências Atmosféricas - Instituto de Astronomia, Geofísica e Ciências Atmosféricas - IAG, Universidade de São Paulo, São Paulo, Brazil
| | | | - Araya Asfaw
- Physics Department, Addis Ababa University, Ethiopia
| | - Kosar Hama Aziz
- Department of Chemistry, College of Science, University of Sulaimani, Kurdistan Region, Iraq
| | - Shi-Jie Cao
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; School of Architecture, Southeast University, Nanjing, China
| | - Ahmed El-Gendy
- Department of Construction Engineering, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Gopika Indu
- Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India
| | | | - Matthias Ketzel
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Mukesh Khare
- Department of Civil Engineering, Indian Institute of Technology Delhi, India
| | - Sri Harsha Kota
- Department of Civil Engineering, Indian Institute of Technology Delhi, India
| | - Tesfaye Mamo
- Physics Department, Addis Ababa University, Ethiopia
| | | | | | - Aonghus McNabola
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; Department of Civil, Structural & Environmental Engineering, Trinity College Dublin, Dublin, Ireland
| | - Lidia Morawska
- Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom; International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia
| | - Fryad Mustafa
- Department of Chemistry, College of Science, University of Sulaimani, Kurdistan Region, Iraq
| | | | - Samiha Nahian
- Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh
| | | | - William Nelson
- Department of Environmental and Occupational Health, Muhimbili University of Health and Allied Sciences, Tanzania
| | - Aiwerasia V Ngowi
- Department of Environmental and Occupational Health, Muhimbili University of Health and Allied Sciences, Tanzania
| | | | - Yris Olaya
- Universidad Nacional de Colombia, Colombia
| | - Khalid Omer
- Department of Chemistry, College of Science, University of Sulaimani, Kurdistan Region, Iraq
| | | | - Md Riad Sarkar Pavel
- Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh
| | - Abdus Salam
- Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh
| | - Erik Luan Costa Santos
- Department of Environmental Health - School of Public Health - University of São Paulo, Brazil
| | | | - S M Shiva Nagendra
- Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India
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Molecular Weight Determination of Chitosan with Antibacterial Activity Using Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry Analysis. Macromol Res 2022. [DOI: 10.1007/s13233-022-0013-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Lung SCC, Thi Hien T, Cambaliza MOL, Hlaing OMT, Oanh NTK, Latif MT, Lestari P, Salam A, Lee SY, Wang WCV, Tsou MCM, Cong-Thanh T, Cruz MT, Tantrakarnapa K, Othman M, Roy S, Dang TN, Agustian D. Research Priorities of Applying Low-Cost PM 2.5 Sensors in Southeast Asian Countries. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031522. [PMID: 35162543 PMCID: PMC8835170 DOI: 10.3390/ijerph19031522] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/24/2022] [Accepted: 01/26/2022] [Indexed: 12/19/2022]
Abstract
The low-cost and easy-to-use nature of rapidly developed PM2.5 sensors provide an opportunity to bring breakthroughs in PM2.5 research to resource-limited countries in Southeast Asia (SEA). This review provides an evaluation of the currently available literature and identifies research priorities in applying low-cost sensors (LCS) in PM2.5 environmental and health research in SEA. The research priority is an outcome of a series of participatory workshops under the umbrella of the International Global Atmospheric Chemistry Project–Monsoon Asia and Oceania Networking Group (IGAC–MANGO). A literature review and research prioritization are conducted with a transdisciplinary perspective of providing useful scientific evidence in assisting authorities in formulating targeted strategies to reduce severe PM2.5 pollution and health risks in this region. The PM2.5 research gaps that could be filled by LCS application are identified in five categories: source evaluation, especially for the distinctive sources in the SEA countries; hot spot investigation; peak exposure assessment; exposure–health evaluation on acute health impacts; and short-term standards. The affordability of LCS, methodology transferability, international collaboration, and stakeholder engagement are keys to success in such transdisciplinary PM2.5 research. Unique contributions to the international science community and challenges with LCS application in PM2.5 research in SEA are also discussed.
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Affiliation(s)
- Shih-Chun Candice Lung
- Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan; (S.-Y.L.); (W.-C.V.W.); (M.-C.M.T.)
- Department of Atmospheric Sciences, National Taiwan University, Taipei 106, Taiwan
- Correspondence: ; Tel.: +886-2-27875908
| | - To Thi Hien
- Faculty of Environment, University of Science, Ho Chi Minh City 700000, Vietnam; (T.T.H.); (T.C.-T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Maria Obiminda L. Cambaliza
- Department of Physics, Ateneo de Manila University, Quezon City 1108, Philippines;
- Air Quality Dynamics Laboratory, Manila Observatory, Quezon City 1108, Philippines;
| | | | - Nguyen Thi Kim Oanh
- Environmental Engineering and Management, SERD, Asian Institute of Technology, Pathumthani 12120, Thailand;
| | - Mohd Talib Latif
- Department of Earth Sciences and Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
| | - Puji Lestari
- Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Bandung 40132, Indonesia;
| | - Abdus Salam
- Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh; (A.S.); (S.R.)
| | - Shih-Yu Lee
- Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan; (S.-Y.L.); (W.-C.V.W.); (M.-C.M.T.)
| | - Wen-Cheng Vincent Wang
- Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan; (S.-Y.L.); (W.-C.V.W.); (M.-C.M.T.)
| | - Ming-Chien Mark Tsou
- Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan; (S.-Y.L.); (W.-C.V.W.); (M.-C.M.T.)
| | - Tran Cong-Thanh
- Faculty of Environment, University of Science, Ho Chi Minh City 700000, Vietnam; (T.T.H.); (T.C.-T.)
- College of Public Health, National Taiwan University, Taipei 100, Taiwan
| | | | - Kraichat Tantrakarnapa
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand;
| | - Murnira Othman
- Institute for Environment and Development (Lestari), Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
| | - Shatabdi Roy
- Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh; (A.S.); (S.R.)
| | - Tran Ngoc Dang
- Department of Environmental Health, Faculty of Public Health, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh 700000, Vietnam;
| | - Dwi Agustian
- Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 40171, Indonesia;
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Piracón JAB, Vallejo LAM, Cortés MAQ, Vasquez YA, Achury NJM, Cerón LCB, Hernández MA. Spirometry parameter alterations due to exposure to indoor air pollutants in rural homes in Bogotá, Colombia. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:57275-57287. [PMID: 34086176 DOI: 10.1007/s11356-021-14717-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
The aim of this study was to determine the association between the concentrations of intradomiciliary PM2.5, CO, and BC and alterations in respiratory function parameters in a population living in rural dwellings in Bogotá, Colombia. For this cross-sectional study, people were recruited from the rural areas of the localities of Usme and Sumapaz in Bogotá. In total, 68 participants were recruited by means of nonrandom sampling. Indoor air monitoring of PM2.5, BC, and CO was carried out. Additionally, evaluations of pulmonary function were performed using spirometry. The variables of pulmonary function were included in a multiple linear regression by successive steps and adjusted by the main variables described as modifiers of spirometry parameters, which are age, height, sex, disability, and a history of tobacco use. Assumptions of multicollinearity and the randomization of variances in the residuals were evaluated. Negative associations were found between spirometry parameters and the concentrations of indoor air pollutants. For FEV1/FVC and theoretical FEV1, there was a statistically significant association with the concentration of carbon monoxide (p = 0.003 and 0.019, respectively). The environmental concentrations were higher in homes where biomass was used for cooking, but these differences were statistically significant only for BC and CO (p = 0.008 and 0.03, respectively). The concentrations of carbon monoxide in rural homes were associated with alterations in respiratory function parameters.
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Ren J, Yan X, Zhang L, Yang G. Filtration of submicron dust by a dual-layer granular bed filter with an external electric field. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:48967-48983. [PMID: 33939088 DOI: 10.1007/s11356-021-12900-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
To improve the filtration efficiency of submicron dust by dual-layer granular bed filters, filtration experiments for micro-silica powder were conducted for removing particles smaller than 1 μm that account for more than 96% (by volume) using a dual-layer granular bed filter with an external electric field. Electrostatic enhancement methods, including dust pre-charging, application of an electric field to the lower filter layer, and that to both the upper and lower filter layers, were examined. Results showed that the average filtration efficiency of a dual-layer granular bed filter for micro-silica powder without electric field was 76.52%, the average outlet dust concentration was 263.53 mg/m3, and the filtration cycle time was 73 min. With pre-charged dust, the average outlet dust concentration dropped to 82.51 mg/m3. A decrease in the thickness of the lower filter layer from 45 to 25 mm with electric field reduced the pressure drop from 2570 to 1770 Pa. Meanwhile, the application of an electric field to the lower/upper filter layer reduced the average outlet dust concentration to 25.98 mg/m3. Increasing the initial face velocity from 0.25 to 0.45 m/s increased the average outlet dust concentration from 25.98 to 30.27 mg/m3 and increased the pressure drop from 2570 to 3500 Pa.
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Affiliation(s)
- Jianyu Ren
- Faculty of Maritime and Transportation, Ningbo University, 818 Fenghua Road, Jiangbei District, Ningbo, 315211, People's Republic of China
| | - Xuesong Yan
- Faculty of Maritime and Transportation, Ningbo University, 818 Fenghua Road, Jiangbei District, Ningbo, 315211, People's Republic of China
| | - Lidong Zhang
- Faculty of Maritime and Transportation, Ningbo University, 818 Fenghua Road, Jiangbei District, Ningbo, 315211, People's Republic of China
| | - Guohua Yang
- Faculty of Maritime and Transportation, Ningbo University, 818 Fenghua Road, Jiangbei District, Ningbo, 315211, People's Republic of China.
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Mahdavi A, Siegel JA. Quantitative filter forensics: Size distribution and particulate matter concentrations in residential buildings. INDOOR AIR 2021; 31:1050-1060. [PMID: 33368774 DOI: 10.1111/ina.12782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
We applied filter forensics, the analysis of dust from the heating, ventilation, and air-conditioning (HVAC) filters, to measure particle size distribution in 21 residences in Toronto, Canada over a year. Four filters with different nominal efficiencies (Minimum Efficiency Reporting Value (MERV) 8-14 from ASHRAE Standard 52.2) were deployed in each residence each for three months, while the effective filtration volumes (the product of flow rate, runtime, and in-situ filter efficiency) were characterized over each filter lifetime. Using extraction and laser diffraction, we found that approximately 90% of the volumetric distributions were >10 µm and the volume median diameter (VMD) ranged from 23.4 to 75.1 µm. Using quantitative filter forensics (QFF), total suspended particle (TSP) concentrations ranged from 2.9 to 823.7 µg/m3 (median = 89.8 µg/m3 ) with a moderate correlation with the content of TSP on the filters (in terms of g) and with the TSP effective filtration volume (m3 ) indicating the importance of both filter forensics and HVAC metadata parameters to QFF concentration estimates. There was no strong correlation between PM10 or PM2.5 concentrations and hourly airborne particle number concentrations measured by low-cost sensors suggesting an evaluation of QFF is warranted, particularly for the exploration of smaller particles.
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Affiliation(s)
- Alireza Mahdavi
- Department of Civil and Mineral Engineering, University of Toronto (UofT), Toronto, ON, Canada
| | - Jeffrey A Siegel
- Department of Civil and Mineral Engineering, University of Toronto (UofT), Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto (UofT), Toronto, ON, Canada
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Zhao J, Birmili W, Hussein T, Wehner B, Wiedensohler A. Particle number emission rates of aerosol sources in 40 German households and their contributions to ultrafine and fine particle exposure. INDOOR AIR 2021; 31:818-831. [PMID: 33247488 DOI: 10.1111/ina.12773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 11/15/2020] [Indexed: 06/12/2023]
Abstract
More representative data on source-specific particle number emission rates and associated exposure in European households are needed. In this study, indoor and outdoor particle number size distributions (10-800 nm) were measured in 40 German households under real-use conditions in over 500 days. Particle number emission rates were derived for around 800 reported indoor source events. The highest emission rate was caused by burning candles (5.3 × 1013 h-1 ). Data were analyzed by the single-parameter approach (SPA) and the indoor aerosol dynamics model approach (IAM). Due to the consideration of particle deposition, coagulation, and time-dependent ventilation rates, the emission rates of the IAM approach were about twice as high as those of the SPA. Correction factors are proposed to convert the emission rates obtained from the SPA approach into more realistic values. Overall, indoor sources contributed ~ 56% of the daily-integrated particle number exposure in households under study. Burning candles and opening the window leads to seasonal differences in the contributions of indoor sources to residential exposure (70% and 40% in the cold and warm season, respectively). Application of the IAM approach allowed to attribute the contributions of outdoor particles to the penetration through building shell and entry through open windows (26% and 15%, respectively).
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Affiliation(s)
- Jiangyue Zhao
- Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | | | - Tareq Hussein
- University of Jordan, Amman, Jordan
- Institute for Atmospheric and Earth System Research (INAR/Physics), University of Helsinki, Helsinki, Finland
| | - Birgit Wehner
- Leibniz Institute for Tropospheric Research, Leipzig, Germany
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Mahdavi A, Dingle J, Chan AWH, Siegel JA. HVAC filtration of particles and trace metals: Airborne measurements and the evaluation of quantitative filter forensics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116388. [PMID: 33388682 DOI: 10.1016/j.envpol.2020.116388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 12/12/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Filters installed in the heating, ventilation, and air-conditioning (HVAC) systems can serve as air-cleaning and sampling devices for indoor particles. The purpose of this article is to evaluate these dual roles. An occupied home with a central HVAC system equipped with a Minimum Efficiency Reporting Value (MERV, from ASHRAE Standard 52.2) 11 filter was monitored for six weeks. Weekly airborne gravimetric and real-time sampling was performed to measure the particle size distribution and the concentration of total suspended particles (TSP), PM10, PM2.5, PM1, and 12 trace metals. The weekly system runtimes were intentionally changed to provide a wide range of weekly filtration volumes. The quantitative filter forensics (QFF) concentrations of particulate matter (PM) and trace metals were calculated using the analysis of the dust collected on the HVAC filter, the filtration volume, and filter in-situ efficiency. The results indicated that filtration was not influential to remove PM and trace metals as the concentrations during the weeks with continuous HVAC operation were not consistently lower than those during the other weeks. This suggests the dominance of other particle and trace metal source and loss mechanisms weakens the influence of filtration in this home. The QFF evaluation results indicated that the concentration of TSP and over half of the tested trace metals (e.g., Pb, Cd, Ni, V, Sb, K, and Sr) could be estimated by QFF within a factor of two when compared to airborne sampling results. PM10, PM2.5, and PM1 concentrations were significantly underestimated by QFF potentially due to the limitations of size distribution analysis by a laser diffraction particle sizer (LDPS) for the detection of <1 μm particles. Overall, while QFF was promising for TSP and some trace metals, improvement in size distribution analysis could extend the application of QFF for airborne sampling.
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Affiliation(s)
- Alireza Mahdavi
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada
| | - Justin Dingle
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
| | - Arthur W H Chan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
| | - Jeffrey A Siegel
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
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Lyu L, Li Y, Ou X, Guo W, Zhang Y, Duan S, Gao Y, Xu Y, Yang T, Wang Y. Health effects of occupational exposure to printer emissions on workers in China: Cardiopulmonary function change. NANOIMPACT 2021; 21:100289. [PMID: 35559778 DOI: 10.1016/j.impact.2020.100289] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/30/2020] [Accepted: 12/11/2020] [Indexed: 06/15/2023]
Abstract
Printers emitted nanoparticles (NPs), ozone (O3) and volatile organic chemicals (VOCs) during operation that elicited adverse effects on indoor air quality of the printing room, which may affect the health of exposed workers. The aim of this work was to explore the health effects of occupational exposure to printer emissions on workers, especially cardiovascular and lung function. We sampled particles in the print shop for characterization, including particle size distribution and elemental composition, and measured PM1 number concentrations in print shops and other workplaces. We assessed blood pressure, heart rate and pulmonary function in 53 printing room workers and 54 controls in Beijing, China. Multiple linear regression analysis were used to examine health effects of exposure to printer emissions. The PM1 number concentration in the print shop was more than 2 times that of the control group. Compared with controls, the exposed workers with lower education and income had heavier workload with a median of 7 days per week and 12 h per day on working days, and presented cardiopulmonary function injury with increased the diastolic blood pressure (DBP), systolic blood pressure (SBP), and mean arterial pressure (MAP). The most significant changes of cardiopulmonary function were found in exposed workers with more than 10 years of working age. Multiple linear regression also showed printer emissions exposure was associated with increased SBP and MAP, while decreased lung function indices. This study found changes in the cardiopulmonary function of staff members exposed to printer emissions, which prompted the necessity and urgency of improving the environment of printing rooms and protecting the health of exposed workers.
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Affiliation(s)
- Lizhi Lyu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Yuan Li
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Xiaxian Ou
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Wanqian Guo
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Yi Zhang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Shumin Duan
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Yanjun Gao
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China
| | - Yu Xu
- Department of Respiratory Medicine, Peking University People's Hospital, Beijing, PR China
| | - Tianzhuo Yang
- School of Basic Medical Sciences, Capital Medical University, Beijing, PR China
| | - Yun Wang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, PR China.
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11
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Gumashta R, Bijlwan A. Public Health Threat Assessment of Vehicular Load Index-Induced Urban Air Pollution Indices Near Traffic Intersections In Central India. Cureus 2020; 12:e11142. [PMID: 33251052 PMCID: PMC7685812 DOI: 10.7759/cureus.11142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To assess traffic vehicular load, levels of various air pollutants, their correlation at selected traffic intersections of Bhopal city and to suggest suitable public health measures. METHODS A transverse study was conducted by convenience sampling with equated distribution among vehicular load-based large (Group1:G1: 10 TI), medium (Group2:G2: 5 TI), and small (Group3:G3: 5 TI) traffic-intersections (TI) through a systematic stratified random selection of study sites to assess traffic vehicle load index (VLI). RESULTS VLI,G1 (cumulative mean: 16.31; day-time (DT): 19.03, DT range 11.68-51.49; night-time (NT): 13.59, NT range 11.7-18.0), VLI,G2 (cumulative mean: 0.965; DT:0.971, DT range 08.56-11.67; NT: 0.960, NT range 07.54-11.39), and VLI,G3 (cumulative mean: 06.17; DT:06.08, DT range 04.12-06.86; NT: 06.27, NT range 03.74-07.53). There is a significant intergroup difference of the mean (G1 vs G2: p=0.03); (G1 vs G3: p=0.002); (G2 vs G3: p=0.003). The range of VLI is found to be wide within G1 (DT; 11.68-51.49; NT 11.7-18.00) as compared to narrow range in G2 (DT; 8.56-11.67; NT7.54-11.39) and G3 (DT; 4.12-6.86; NT 3.74-7.53). CONCLUSION High air pollution noted at TIs and associated exposure to unprotected commuters pose public-health risks. It has long-term health consequences requiring focused multidisciplinary preventive interventions.
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Affiliation(s)
- Raghvendra Gumashta
- Community Medicine, People's College of Medical Sciences and Research Centre, Bhopal, IND
| | - Aanchal Bijlwan
- Community Medicine, People's College of Medical Sciences and Research Centre, Bhopal, IND
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12
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Wang Y, Li D, Song L, Ding H. Ophiopogonin D attenuates PM2.5-induced inflammation via suppressing the AMPK/NF-κB pathway in mouse pulmonary epithelial cells. Exp Ther Med 2020; 20:139. [PMID: 33093877 PMCID: PMC7571316 DOI: 10.3892/etm.2020.9268] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 07/24/2020] [Indexed: 12/11/2022] Open
Abstract
Exposure to fine particulate matter, such as particulate matter of ≤2.5 µm in diameter (PM2.5), causes pulmonary inflammation and injury to other organs. It has been reported that Ophiopogonin D (OP-D) has anti-inflammatory activity. The aim of the present study was to investigate this anti-inflammatory activity of OP-D on PM2.5-induced acute airway inflammation and its underlying mechanisms. The viability of PM2.5-treated mouse lung epithelial (MLE-12) cells with or without OP-D treatment was determined using a Cell Counting Kit-8 assay. The corresponding levels of IL-1β, IL-6, IL-8 and TNF-α were examined via ELISA. Subcellular localization of NF-κBp65 was detected using immunofluorescence staining. The expression levels of AMP-activated protein kinase (AMPK), phosphorylated (p)-AMPK, NF-κBp65 and p-NF-κBp65 were analyzed using western blotting. The selective AMPK inhibitor Compound C (CC) was utilized to investigate the involvement of AMPK in the protection against PM2.5-induced cell inflammation by OP-D treatment. The results demonstrated that OP-D significantly ameliorated the PM2.5-stimulated release of proinflammatory cytokines (TNF-α, IL-1β, IL-6 and IL-8) and inhibited the translocation of NF-κBp65 from the cytoplasm to the nucleus in MLE-12 cells. Moreover, OP-D significantly prevented the PM2.5-triggered phosphorylation of NF-κBp65 and upregulated AMPK activity. The anti-inflammatory activity of OP-D could also be attenuated by the AMPK-specific inhibitor CC. The present results suggested that the anti-inflammatory activity of OP-D was mediated via AMPK activation and NF-κB signaling pathway downregulation, which ameliorated the expression of proinflammatory cytokines. Therefore, OP-D could be a candidate drug to treat PM2.5-induced airway inflammation.
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Affiliation(s)
- Ying Wang
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China.,Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Dan Li
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Lei Song
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Hui Ding
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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13
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Lee YS, Min D, Park SY, Lee J, Bae H. Standardized herbal extract PM014 alleviates fine dust-induced lung inflammation in mice. BMC Complement Med Ther 2020; 20:270. [PMID: 32894124 PMCID: PMC7487483 DOI: 10.1186/s12906-020-03060-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Accepted: 08/25/2020] [Indexed: 11/10/2022] Open
Abstract
Background Fine dust penetrates deep into the human alveoli, and the fine dust accumulated in the bronchus and lungs can directly trigger various respiratory diseases. PM014 (HL301) is the herbal extract derived from the herbal medicine Chung-Sang-Bo-Ha-Tang which is used for the treatment of lung diseases. Methods To evaluate the effect of PM014 on the lung inflammation induced by fine dust, this study investigated inflammatory responses in the lung upon pm10 exposure by examining the infiltration of inflammatory cell profiles from bronchial alveolar lavage fluid (BALF), lung histology, and production of pro-inflammatory cytokines measured by RT-PCR and ELISA. Results PM014-treated mice exhibited reduced lung tissue damage and inflammatory cell infiltration. Bronchoalveolar lavage fluid (BALF) analysis showed significant decrease in the population of total cells, macrophages, eosinophils, and neutrophils in PM014-treated mice. PM014 treatment downregulated the pro-inflammatory cytokine expressions including IL-1b, IL-8, IL-6, TNF-alpha, IL-21 and IL-17. ELISA analysis also showed reduced production of IL-1b, IL-6 and IL-17 in PM014-treated mice. Conclusion PM014 suppressed the pm10-induced inflammatory response in mice. This study shows that PM014 is a possible therapeutic agent for lung inflammation induced by fine dust.
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Affiliation(s)
- Ye-Seul Lee
- Department of Anatomy and Acupoint, College of Korean Medicine, Gachon University, Seongnam, 13120, South Korea
| | - Daeun Min
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26-6 Kyungheedae-ro, Dongdaemoon-gu, Seoul, 02453, Republic of Korea
| | - Seon-Young Park
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26-6 Kyungheedae-ro, Dongdaemoon-gu, Seoul, 02453, Republic of Korea
| | - Junyoung Lee
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26-6 Kyungheedae-ro, Dongdaemoon-gu, Seoul, 02453, Republic of Korea
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26-6 Kyungheedae-ro, Dongdaemoon-gu, Seoul, 02453, Republic of Korea.
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14
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Nayeem AA, Majumder AK, Hossain MS, Carter WS. The Impact of Air Pollution on Lung Function: A Case Study on the Rickshaw Pullers in Dhaka City, Bangladesh. ACTA ACUST UNITED AC 2020. [DOI: 10.29252/jhehp.6.2.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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15
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Sensitivity study of plant species due to traffic emitted air pollutants (NO2 and PM2.5) during different seasons in Dhaka, Bangladesh. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1421-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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