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Chuang YS, Berekute AK, Hsu HY, Wei HS, Gong WC, Hsu YY, Tsai CJ, Yu KP. Assessment of emissions and exposure in 3D printing workplaces in Taiwan. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2024; 21:270-286. [PMID: 38451632 DOI: 10.1080/15459624.2024.2313655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Three-dimensional (3D) printing is an emerging and booming industry in Taiwan. Compared to traditional manufacturing, 3D printing has various advantages, such as advanced customization, additive manufacturing, reduced mold opening time, and reduced consumption of precursors. In this study, the real-time monitoring of particulate matter (PM) and total volatile organic compound (TVOC) emissions from various filaments is investigated using fused deposition modeling with material extrusion technology, a liquid-crystal display, a stereolithography apparatus based on vat photopolymerization technology, and binder jetting for occupational settings. An exposure assessment for nearby workers using the 3D printing process was performed, and improvement measures were recommended. Nine 3D printing fields were measured. The generation rate of ultrafine particles ranged from 1.19 × 1010 to 4.90 × 1012 #/min, and the geometric mean particle size ranged from 30.91 to 55.50 nm. The average concentration of ultrafine particles ranged from 2.31 × 103 to 7.36 × 104 #/cm3, and the PM2.5 and PM10 concentrations in each field ranged from 0.74 ± 0.27 to 12.46 ± 5.61 μg/m3 and from 2.39 ± 0.60 to 30.65 ± 21.26 μg/m3, respectively. The TVOC concentration ranged from 0.127 ± 0.012 to 1.567 ± 0.172 ppm. The respiratory deposition (RDUFPs) dose ranged from 2.02 × 1013 to 5.54 × 1014 nm2/day. Depending on the operating conditions, appropriate control and protective measures should be employed to protect workers' health.
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Affiliation(s)
- Yung-Sheng Chuang
- Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Abiyu Kerebo Berekute
- Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Chemistry, College of Natural and Computational Sciences, Arba Minch University, Arbaminch, Ethiopia
| | - Hsuan-Yu Hsu
- Institute of Environmental Engineering, National Yang Ming Chiao Tung University, Hsinchu City, Taiwan
| | - Ho-Sheng Wei
- Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Wen-Cheng Gong
- Department of Chemistry, College of Natural and Computational Sciences, Arba Minch University, Arbaminch, Ethiopia
| | - Ya-Yuan Hsu
- Institute of Labor, Occupational Safety and Health, Ministry of Labor, New Taipei City, Taiwan
| | - Chuen-Jinn Tsai
- Institute of Environmental Engineering, National Yang Ming Chiao Tung University, Hsinchu City, Taiwan
| | - Kuo-Pin Yu
- Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Kek HY, Tan H, Othman MHD, Nyakuma BB, Goh PS, Wong SL, Deng X, Leng PC, Yatim AS, Wong KY. Perspectives on human movement considerations in indoor airflow assessment: a comprehensive data-driven systematic review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:121253-121268. [PMID: 37979109 DOI: 10.1007/s11356-023-30912-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
Understanding particle dispersion characteristics in indoor environments is crucial for revising infection prevention guidelines through optimized engineering control. The secondary wake flow induced by human movements can disrupt the local airflow field, which enhances particle dispersion within indoor spaces. Over the years, researchers have explored the impact of human movement on indoor air quality (IAQ) and identified noteworthy findings. However, there is a lack of a comprehensive review that systematically synthesizes and summarizes the research in this field. This paper aims to fill that gap by providing an overview of the topic and shedding light on emerging areas. Through a systematic review of relevant articles from the Web of Science database, the study findings reveal an emerging trend and current research gaps on the topic titled Impact of Human Movement in Indoor Airflow (HMIA). As an overview, this paper explores the effect of human movement on human microenvironments and particle resuspension in indoor environments. It delves into the currently available methods for assessing the HMIA and proposes the integration of IoT sensors for potential indoor airflow monitoring. The present study also emphasizes incorporating human movement into ventilation studies to achieve more realistic predictions and yield more practical measures. This review advances knowledge and holds significant implications for scientific and public communities. It identifies future research directions and facilitates the development of effective ventilation strategies to enhance indoor environments and safeguard public health.
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Affiliation(s)
- Hong Yee Kek
- Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Huiyi Tan
- Faculty of Chemical & Energy Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Mohd Hafiz Dzarfan Othman
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Bemgba Bevan Nyakuma
- Department of Chemical Sciences, Faculty of Science and Computing, Pen Resource University, P. M. B. 086, Gombe, Gombe State, Nigeria
| | - Pei Sean Goh
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Syie Luing Wong
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands
| | - Xiaorui Deng
- Department of Building Environment and Energy Engineering, College of Civil Engineering, Hunan University, Changsha, 410082, Hunan, China
| | - Pau Chung Leng
- Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Ardiyansyah Saad Yatim
- Department of Mechanical Engineering, Universitas Indonesia, 16424, Depok, Jawa Barat, Indonesia
| | - Keng Yinn Wong
- Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
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Huang WW, Sallah-Ud-Din R, Dlamini WN, Berekute AK, Getnet ME, Yu KP. Effectiveness of a covered oil-free cooking process on the abatement of air pollutants from cooking meats. Heliyon 2023; 9:e19531. [PMID: 37809458 PMCID: PMC10558720 DOI: 10.1016/j.heliyon.2023.e19531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/20/2023] [Accepted: 08/25/2023] [Indexed: 10/10/2023] Open
Abstract
Cooking events can generate household air pollutants that deteriorate indoor air quality (IAQ), which poses a threat to human health and well-being. In this study, the emission characteristics and emission factors (EFs) of air pollutants of different meats (beef, lamb, chicken, pork, and fish) cooked by a novel oil-free process and common with-oil processes were investigated. Oil-free cooking tends to emit lower total volatile organic compound (TVOC) levels and fewer submicron smoke particles and can reduce the intake of fat and calories. However, TVOC emissions during oil-free cooking were significantly different, and the lamb EFs were nearly 8 times higher than those during with-oil cooking. The particle-bound polycyclic aromatic hydrocarbon (ƩPPAH) and benzo(a)pyrene-equivalent (ƩBaPeq) EFs during with-oil cooking ranged from 76.1 to 140.5 ng/g and 7.7-12.4 ng/g, respectively, while those during oil-free cooking ranged from 41.0 to 176.6 ng/g and 5.4-47.6 ng/g, respectively. The ƩPPAH EFs of chicken, pork, and fish were lower during oil-free cooking than during cooking with oil. Furthermore, the ƩBaPeq EFs of beef, chicken, pork, and fish were lower during oil-free cooking than during cooking with oil. Therefore, it is recommended to use the oil-free method to cook chicken, pork, and fish to reduce ƩPPAH and ƩBaPeq emissions, but not recommended to cook lamb due to the increase of ƩBaPeq emissions. The with-oil uncovered cooking EFs of aldehydes ranged from 3.77 to 22.09 μg/g, and those of oil-free cooking ranged from 4.88 to 19.96 μg/g. The aldehyde EFs were lower during oil-free covered cooking than with-oil uncovered cooking for beef, chicken, and fish. This study provides a better realizing of new cooking approaches for the reduction of cooking-induced emission, but further research on the effects of food composition (moisture and fat) and characteristics is needed.
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Affiliation(s)
- Wei-Wen Huang
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming Chiao Tung University, Taipei, Taiwan(ROC)
| | - Rasham Sallah-Ud-Din
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming Chiao Tung University, Taipei, Taiwan(ROC)
- Department of International Ph.D. Program in Environmental Sciences and Technology, University System of Taiwan, Taipei, Taiwan(ROC)
| | - Wonder Nathi Dlamini
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming Chiao Tung University, Taipei, Taiwan(ROC)
- Department of International Ph.D. Program in Environmental Sciences and Technology, University System of Taiwan, Taipei, Taiwan(ROC)
| | - Abiyu Kerebo Berekute
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming Chiao Tung University, Taipei, Taiwan(ROC)
- Department of Chemistry, College of Natural and Computational Sciences, Arba Minch University, Arbaminch, Ethiopia
| | | | - Kuo-Pin Yu
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming Chiao Tung University, Taipei, Taiwan(ROC)
- Department of International Ph.D. Program in Environmental Sciences and Technology, University System of Taiwan, Taipei, Taiwan(ROC)
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Park YM, Chavez D, Sousan S, Figueroa-Bernal N, Alvarez JR, Rocha-Peralta J. Personal exposure monitoring using GPS-enabled portable air pollution sensors: A strategy to promote citizen awareness and behavioral changes regarding indoor and outdoor air pollution. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2023; 33:347-357. [PMID: 36513791 PMCID: PMC10238623 DOI: 10.1038/s41370-022-00515-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 06/03/2023]
Abstract
BACKGROUND Little is known about how individuals are exposed to air pollution in various daily activity spaces due to a lack of data collected in the full range of spatial contexts in which they spend their time. The limited understanding makes it difficult for people to act in informed ways to reduce their exposure both indoors and outdoors. OBJECTIVE This study aimed to (1) assess whether personalized air quality data collected using GPS-enabled portable monitors (GeoAir2), coupled with travel-activity diaries, promote people's awareness and behavioral changes regarding indoor and outdoor air pollution and (2) demonstrate the effect of places and activities on personal exposure by analyzing individual exposure profiles. METHODS 44 participants carried GeoAir2 to collect geo-referenced air pollution data and completed travel-activity diaries for three days. These data were then combined for spatial data analysis and visualization. Participants also completed pre- and post-session surveys about awareness and behaviors regarding air pollution. Paired-sample t-tests were performed to evaluate changes in knowledge, attitudes/perceptions, and behavioral intentions/practices, respectively. Lastly, follow-up interviews were conducted with a subset of participants. RESULTS Most participants experienced PM2.5 peaks indoors, especially when cooking at home, and had the lowest exposure in transit. Participants reported becoming more aware of air quality in their surroundings and more concerned about its health effects (t = 3.92, p = 0.000) and took more action or were more motivated to alter their behaviors to mitigate their exposure (t = 3.40, p = 0.000) after the intervention than before. However, there was no significant improvement in knowledge (t = 0.897; p = 0.187). SIGNIFICANCE Personal exposure monitoring, combined with travel-activity diaries, leads to positive changes in attitudes, perceptions, and behaviors related to air pollution. This study highlights the importance of citizen engagement in air monitoring for effective risk communication and air pollution management.
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Affiliation(s)
- Yoo Min Park
- Department of Geography, Planning, and Environment, Thomas Harriot College of Arts and Sciences, East Carolina University, Greenville, NC, 27858, USA.
| | - Denise Chavez
- Department of Geography, Planning, and Environment, Thomas Harriot College of Arts and Sciences, East Carolina University, Greenville, NC, 27858, USA
| | - Sinan Sousan
- Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
- North Carolina Agromedicine Institute, Greenville, NC, 27834, USA
| | - Natalia Figueroa-Bernal
- Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, Greenville, NC, 27858, USA
- Association of Mexicans in North Carolina, Greenville, NC, 27834, USA
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5
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Wang J, Du W, Lei Y, Chen Y, Wang Z, Mao K, Tao S, Pan B. Quantifying the dynamic characteristics of indoor air pollution using real-time sensors: Current status and future implication. ENVIRONMENT INTERNATIONAL 2023; 175:107934. [PMID: 37086491 DOI: 10.1016/j.envint.2023.107934] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 04/12/2023] [Accepted: 04/12/2023] [Indexed: 05/03/2023]
Abstract
People generally spend most of their time indoors, making indoor air quality be of great significance to human health. Large spatiotemporal heterogeneity of indoor air pollution can be hardly captured by conventional filter-based monitoring but real-time monitoring. Real-time monitoring is conducive to change air assessment mode from static and sparse analysis to dynamic and massive analysis, and has made remarkable strides in indoor air evaluation. In this review, the state of art, strengths, challenges, and further development of real-time sensors used in indoor air evaluation are focused on. Researches using real-time sensors for indoor air evaluation have increased rapidly since 2018, and are mainly conducted in China and the USA, with the most frequently investigated air pollutants of PM2.5. In addition to high spatiotemporal resolution, real-time sensors for indoor air evaluation have prominent advantages in 3-dimensional monitoring, pollution peak and source identification, and short-term health effect evaluation. Huge amounts of data from real-time sensors also facilitate the modeling and prediction of indoor air pollution. However, challenges still remain in extensive deployment of real-time sensors indoors, including the selection, performance, stability, as well as calibration of sensors. In future, sensors with high performance, long-term stability, low price, and low energy consumption are welcomed. Furthermore, more target air pollutants are also expected to be detected simultaneously by real-time sensors in indoor air monitoring.
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Affiliation(s)
- Jinze Wang
- Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Wei Du
- Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China.
| | - Yali Lei
- Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China
| | - Yuanchen Chen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, China
| | - Zhenglu Wang
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, China
| | - Kang Mao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
| | - Shu Tao
- Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Bo Pan
- Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, China
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6
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Mao N, Zhang D, Li Y, Li Y, Li J, Zhao L, Wang Q, Cheng Z, Zhang Y, Long E. How do temperature, humidity, and air saturation state affect the COVID-19 transmission risk? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3644-3658. [PMID: 35951241 PMCID: PMC9366825 DOI: 10.1007/s11356-022-21766-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/27/2022] [Indexed: 05/10/2023]
Abstract
Environmental parameters have a significant impact on the spread of respiratory viral diseases (temperature (T), relative humidity (RH), and air saturation state). T and RH are strongly correlated with viral inactivation in the air, whereas supersaturated air can promote droplet deposition in the respiratory tract. This study introduces a new concept, the dynamic virus deposition ratio (α), that reflects the dynamic changes in viral inactivation and droplet deposition under varying ambient environments. A non-steady-state-modified Wells-Riley model is established to predict the infection risk of shared air space and highlight the high-risk environmental conditions. Findings reveal that a rise in T would significantly reduce the transmission of COVID-19 in the cold season, while the effect is not significant in the hot season. The infection risk under low-T and high-RH conditions, such as the frozen seafood market, is substantially underestimated, which should be taken seriously. The study encourages selected containment measures against high-risk environmental conditions and cross-discipline management in the public health crisis based on meteorology, government, and medical research.
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Affiliation(s)
- Ning Mao
- MOE Key Laboratory of Deep Earth Science and Engineering, Institute of Disaster Management and Reconstruction, Sichuan University, Chengdu, China
| | - Dingkun Zhang
- Laboratory of Clinical Proteomics and Metabolomics, Institutes for Systems Genetics, West China Hospital, Sichuan University, Chengdu, China
| | - Yupei Li
- MOE Key Laboratory of Deep Earth Science and Engineering, Institute of Disaster Management and Reconstruction, Sichuan University, Chengdu, China
| | - Ying Li
- College of Architecture and Environment, Sichuan University, Chengdu, China
| | - Jin Li
- College of Architecture and Environment, Sichuan University, Chengdu, China
| | - Li Zhao
- China Academy of Building Research, Beijing, China
| | - Qingqin Wang
- China Academy of Building Research, Beijing, China
| | - Zhu Cheng
- College of Architecture and Environment, Sichuan University, Chengdu, China
| | - Yin Zhang
- College of Architecture and Environment, Sichuan University, Chengdu, China
| | - Enshen Long
- MOE Key Laboratory of Deep Earth Science and Engineering, Institute of Disaster Management and Reconstruction, Sichuan University, Chengdu, China
- College of Architecture and Environment, Sichuan University, Chengdu, China
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Kim Y, Shin D, Hong KJ, Lee G, Kim SB, Park I, Kim HJ, Kim YJ, Han B, Hwang J. Prediction of indoor PM 2.5 concentrations and reduction strategies for cooking events through various IAQ management methods in an apartment of South Korea. INDOOR AIR 2022; 32:e13173. [PMID: 36437657 DOI: 10.1111/ina.13173] [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: 07/25/2022] [Revised: 10/10/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Indoor PM2.5 in apartments must be effectively managed to minimize adverse impacts on human health. Cooking is the one of the main PM2.5 sources in apartments, and indoor air quality (IAQ) management methods (natural ventilation, mechanical ventilations, range hoods, and air purifiers) are typically used to reduce PM2.5 generated during cooking. For effective control of indoor PM2.5 , prediction of PM2.5 reduction for various IAQ management methods is necessary. This study carefully predicted indoor PM2.5 concentrations in an apartment when IAQ management methods were applied separately and/or in combination during cooking. The infiltration and exfiltration were verified by comparing the experimental results of CO2 concentration with those predicted with or without mechanical ventilation. The deposition rate for PM2.5 generated by cooking was also derived by comparing the experimental PM2.5 changes with the predicted values for PM2.5 natural decay. Through this method, effective PM2.5 control ways during cooking in apartments can be proposed, such as natural ventilation with a range hood for 30 min and then the operation of an air purifier for 30 min. Additionally, if this prediction is combined with energy consumption, it will be possible to propose the most energy-efficient indoor PM2.5 control methods for various seasons and outdoor conditions.
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Affiliation(s)
- Younghun Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea
| | - Dongho Shin
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea
| | - Kee-Jung Hong
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Gunhee Lee
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Sang Bok Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Inyong Park
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Hak-Joon Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Yong-Jin Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Bangwoo Han
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea
| | - Jungho Hwang
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea
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Kim Y, Shin D, Hong KJ, Lee G, Kim SB, Park I, Han B, Hwang J. Efficient Energy Saving Scenarios for Indoor PM 2.5 Management in an Apartment of South Korea. TOXICS 2022; 10:609. [PMID: 36287889 PMCID: PMC9608909 DOI: 10.3390/toxics10100609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/05/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Indoor PM2.5 must be effectively controlled to minimize adverse impacts on public health. Cooking is one of the main sources of PM2.5 in residential areas, and indoor air quality (IAQ) management methods such as natural and mechanical ventilation, range hood, and air purifier are typically used to reduce cooking-generated PM2.5 concentrations. However, studies on the combined effects of various IAQ management methods on indoor PM2.5 reduction and energy consumption are limited. In this study, a theoretical model was established to estimate the performance of various IAQ management methods for controlling indoor PM2.5 concentrations and energy consumption. The model was verified by comparative experiments in which, various IAQ management methods were operated individually or combined. Seasonal energy consumption was calculated through the verified model, and energy consumption saving scenarios were derived for maintaining indoor PM2.5 concentrations less than 10 μg/m3, a World Health Organization annual guideline, under fair and poor outdoor PM2.5 concentrations of 15 and 50 μg/m3, respectively. Based on our results, we found that energy consumption could be reduced significantly by applying natural ventilation in spring, autumn, and summer and mechanical ventilation in winter. Our study identified efficient energy saving PM2.5 management scenarios using various IAQ management methods by predicting indoor PM2.5 concentration and energy consumption according to the annual life patterns of typical residents in South Korea.
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Affiliation(s)
- Younghun Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
- Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea
| | - Dongho Shin
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
- Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea
| | - Kee-Jung Hong
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
| | - Gunhee Lee
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
| | - Sang Bok Kim
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
| | - Inyong Park
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
| | - Bangwoo Han
- Department of Sustainable Environment Research, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
| | - Jungho Hwang
- Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea
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9
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Investigation of the Optimal Operating Position of an Air Cleaner in Terms of Indoor Air Quality in a Four-Bed Hospital Ward. TOXICS 2022; 10:toxics10070360. [PMID: 35878265 PMCID: PMC9317463 DOI: 10.3390/toxics10070360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 06/26/2022] [Accepted: 06/27/2022] [Indexed: 12/16/2022]
Abstract
The use of air cleaners indoors has increased with the increase in indoor activities driven by the COVID-19 outbreak. In this study, the indoor air quality was determined at the location of each patient’s respirator in a four-bed hospital ward equipped with a ventilation system and curtains, by varying the position of one air cleaner. By operating the air cleaner alone without the ventilation system, it was confirmed that it is better to place the air cleaner close to the center of the ward, regardless of whether curtains are used. It was further identified that the farther away the air cleaner is from the center, the worse the age of air could be, compared to the case of operating it in the center. Moreover, the situation where the ventilation system and air cleaner were operated simultaneously in the hospital ward was considered. It was discovered that operating the air cleaner close to the ventilation inlets in the absence of curtains helps to improve the indoor air quality. Furthermore, it was found that the age of the air is generally low near the location where the air cleaner is operated in the presence of curtains. Selecting an optimal position for the air cleaner can improve the air quality at the location of each bed in a four-bed hospital ward.
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Myers NT, Laumbach RJ, Black KG, Ohman‐Strickland P, Alimokhtari S, Legard A, De Resende A, Calderón L, Lu FT, Mainelis G, Kipen HM. Portable air cleaners and residential exposure to SARS-CoV-2 aerosols: A real-world study. INDOOR AIR 2022; 32:e13029. [PMID: 35481935 PMCID: PMC9111720 DOI: 10.1111/ina.13029] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 03/22/2022] [Accepted: 04/02/2022] [Indexed: 05/04/2023]
Abstract
Individuals with COVID-19 who do not require hospitalization are instructed to self-isolate in their residences. Due to high secondary infection rates in household members, there is a need to understand airborne transmission of SARS-CoV-2 within residences. We report the first naturalistic intervention study suggesting a reduction of such transmission risk using portable air cleaners (PACs) with HEPA filters. Seventeen individuals with newly diagnosed COVID-19 infection completed this single-blind, crossover, randomized study. Total and size-fractionated aerosol samples were collected simultaneously in the self-isolation room with the PAC (primary) and another room (secondary) for two consecutive 24-h periods, one period with HEPA filtration and the other with the filter removed (sham). Seven out of sixteen (44%) air samples in primary rooms were positive for SARS-CoV-2 RNA during the sham period. With the PAC operated at its lowest setting (clean air delivery rate [CADR] = 263 cfm) to minimize noise, positive aerosol samples decreased to four out of sixteen residences (25%; p = 0.229). A slight decrease in positive aerosol samples was also observed in the secondary room. As the world confronts both new variants and limited vaccination rates, our study supports this practical intervention to reduce the presence of viral aerosols in a real-world setting.
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Affiliation(s)
- Nirmala T. Myers
- Department of Environmental SciencesRutgers UniversityNew BrunswickNew JerseyUSA
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Robert J. Laumbach
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
- Department of Environmental and Occupational Health and JusticeRutgers UniversityPiscatawayNew JerseyUSA
| | - Kathleen G. Black
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Pamela Ohman‐Strickland
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
- Department of Biostatistics and EpidemiologyRutgers School of Public HealthRutgers UniversityPiscatawayNew JerseyUSA
| | - Shahnaz Alimokhtari
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Alicia Legard
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Adriana De Resende
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Leonardo Calderón
- Department of Environmental SciencesRutgers UniversityNew BrunswickNew JerseyUSA
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Frederic T. Lu
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Gediminas Mainelis
- Department of Environmental SciencesRutgers UniversityNew BrunswickNew JerseyUSA
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
| | - Howard M. Kipen
- Rutgers Environmental and Occupational Health Sciences InstituteRutgers UniversityPiscatawayNew JerseyUSA
- Department of Environmental and Occupational Health and JusticeRutgers UniversityPiscatawayNew JerseyUSA
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11
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Connolly RE, Yu Q, Wang Z, Chen YH, Liu JZ, Collier-Oxandale A, Papapostolou V, Polidori A, Zhu Y. Long-term evaluation of a low-cost air sensor network for monitoring indoor and outdoor air quality at the community scale. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150797. [PMID: 34626631 DOI: 10.1016/j.scitotenv.2021.150797] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Given the growing interest in community air quality monitoring using low-cost sensors, 30 PurpleAir II sensors (12 outdoor and 18 indoor) were deployed in partnership with community members living adjacent to a major interstate freeway from December 2017- June 2019. Established quality assurance/quality control techniques for data processing were used and sensor data quality was evaluated by calculating data completeness and summarizing PM2.5 measurements. To evaluate outdoor sensor performance, correlation coefficients (r) and coefficients of divergence (CoD) were used to assess temporal and spatial variability of PM2.5 between sensors. PM2.5 concentrations were also compared to traffic levels to assess the sensors' ability to detect traffic pollution. To evaluate indoor sensors, indoor/outdoor (I/O) ratios during resident-reported activities were calculated and compared, and a linear mixed-effects regression model was developed to quantify the impacts of ambient air quality, microclimatic factors, and indoor human activities on indoor PM2.5. In general, indoor sensors performed more reliably than outdoor sensors (completeness: 73% versus 54%). All outdoor sensors were highly temporally correlated (r > 0.98) and spatially homogeneous (CoD<0.06). The observed I/O ratios were consistent with existing literature, and the mixed-effects model explains >85% of the variation in indoor PM2.5 levels, indicating that indoor sensors detected PM2.5 from various sources. Overall, this study finds that community-maintained sensors can effectively monitor PM2.5, with main data quality concerns resulting from outdoor sensor data incompleteness.
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Affiliation(s)
- Rachel E Connolly
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States
| | - Qiao Yu
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States
| | - Zemin Wang
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States
| | - Yu-Han Chen
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States
| | - Jonathan Z Liu
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States
| | | | | | - Andrea Polidori
- South Coast Air Quality Management District, Diamond Bar, CA 91765, United States
| | - Yifang Zhu
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, CA 90095, United States.
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12
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Adam MG, Tran PTM, Balasubramanian R. Air quality changes in cities during the COVID-19 lockdown: A critical review. ATMOSPHERIC RESEARCH 2021; 264:105823. [PMID: 34456403 PMCID: PMC8384485 DOI: 10.1016/j.atmosres.2021.105823] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 08/11/2021] [Accepted: 08/21/2021] [Indexed: 05/04/2023]
Abstract
In response to the rapid spread of coronavirus disease-2019 (COVID-19) within and across countries and the need to protect public health, governments worldwide introduced unprecedented measures such as restricted road and air travel and reduced human mobility in 2020. The curtailment of personal travel and economic activity provided a unique opportunity for researchers to assess the interplay between anthropogenic emissions of primary air pollutants, their physical transport, chemical transformation, ultimate fate and potential health impacts. In general, reductions in the atmospheric levels of outdoor air pollutants such as particulate matter (PM), nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), and volatile organic compounds (VOCs) were observed in many countries during the lockdowns. However, the levels of ozone (O3), a secondary air pollutant linked to asthma and respiratory ailments, and secondary PM were frequently reported to remain unchanged or even increase. An increase in O3 can enhance the formation of secondary PM2.5, especially secondary organic aerosols, through the atmospheric oxidation of VOCs. Given that the gaseous precursors of O3 (VOCs and NOx) are also involved in the formation of secondary PM2.5, an integrated control strategy should focus on reducing the emission of the common precursors for the co-mitigation of PM2.5 and O3 with an emphasis on their complex photochemical interactions. Compared to outdoor air quality, comprehensive investigations of indoor air quality (IAQ) are relatively sparse. People spend more than 80% of their time indoors with exposure to air pollutants of both outdoor and indoor origins. Consequently, an integrated assessment of exposure to air pollutants in both outdoor and indoor microenvironments is needed for effective urban air quality management and for mitigation of health risk. To provide further insights into air quality, we do a critical review of scientific articles, published from January 2020 to December 2020 across the globe. Finally, we discuss policy implications of our review in the context of global air quality improvement.
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Affiliation(s)
- Max G Adam
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Phuong T M Tran
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
- Faculty of Environment, University of Science and Technology, The University of Danang, 54 Nguyen Luong Bang Street, Lien Chieu District, Danang City, Viet Nam
| | - Rajasekhar Balasubramanian
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
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13
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Tran PTM, Adam MG, Balasubramanian R. Assessment and mitigation of toddlers' personal exposure to black carbon before and during the COVID-19 pandemic: A case study in Singapore. ENVIRONMENTAL RESEARCH 2021; 202:111711. [PMID: 34280416 PMCID: PMC9749899 DOI: 10.1016/j.envres.2021.111711] [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: 04/25/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 05/17/2023]
Abstract
Black carbon (BC), an important indicator of traffic-related air pollution (TRAP) in urban environments, is receiving increased attention because of its adverse health effects. Personal exposure (PE) of adults to BC has been widely studied, but little is known about the exposure of young children (toddlers) to BC in cities. We carried out a pilot study to investigate the integrated daily PE of toddlers to BC in a city-state with a high population density (Singapore). We studied the impact of urban traffic on the PE of toddlers to BC by comparing and contrasting on-road traffic flow (i.e., volume and composition) in Singapore in 2019 (before the COVID-19 pandemic) and in 2020 (during the COVID-19 pandemic). Our observations indicate that the daily BC exposure levels and inhaled doses increased by about 25% in 2020 (2.9 ± 0.3 μg m-3 and 35.5 μg day-1) compared to that in 2019 (2.3 ± 0.4 μg m-3 and 28.5 μg day-1 for exposure concentration and inhaled dose, respectively). The increased BC levels were associated with the increased traffic volume on both weekdays and weekends in 2020 compared to the same time period in 2019. Specifically, we observed an increase in the number of trucks as well as cars/taxis and motorcycles (private transport) and a decline in the number of buses (public transport) in 2020. The implementation of lockdown measures in 2020 resulted in significant changes in the time, place and duration of PE of toddlers to BC. The recorded daily time-activity patterns indicated that toddlers spent almost all the time in indoor environments during the measurement period in 2020. When we compared different ventilation options (natural ventilation (NV), air conditioning (AC), and portable air cleaner (PAC)) for mitigation of PE to BC in the home environment, we found a significant decrease (>30%) in daily BC exposure levels while using the PAC compared to the NV scenario. Our case study shows that the PE of toddlers to BC is of health concern in indoor environments in 2020 because of the migration of the increased TRAP into naturally ventilated residential homes and more time spent indoors than outdoors. Since toddlers' immune system is weak, technological intervention is necessary to protect their health against inhalation exposure to air pollutants.
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Affiliation(s)
- Phuong T M Tran
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore; Faculty of Environment, University of Science and Technology, The University of Danang, 54 Nguyen Luong Bang Street, Lien Chieu District, Danang City, Viet Nam
| | - Max G Adam
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Rajasekhar Balasubramanian
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore.
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14
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Cho KS, Kang SK, Lee YY, Lee SY, Lee I. Effect of upflow and downflow baffle configuration on particulate matter removal in a mirror-symmetrical multi-compartment scrubber. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:902-911. [PMID: 34304695 DOI: 10.1080/10934529.2021.1938907] [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: 01/19/2021] [Revised: 05/28/2021] [Accepted: 05/29/2021] [Indexed: 06/13/2023]
Abstract
Control over particulate matter (PM) emission from grilling is required for improving public health and air quality. The performance of mirror-symmetrical multi-compartment scrubbers with an upflow (U-type) and downflow baffle (D-type) configuration was evaluated for PM emission control from grilling at a flow rate of 30 m3 min-1. The PM removal efficiency of the U-type scrubber was the highest when the water level was 8 cm (95.6%), and the pressure drops recorded at the water levels of 6, 8 and 10 cm were 103, 122 and 153 mmH2O, respectively. Although PM removal efficiency of the D-type scrubber was over 91.0% at the water levels of 8, 10 and 12 cm, the pressure drops were 124, 142 and 185 mmH2O, respectively. A comprehensive evaluation of the water volume, pressure drop and PM removal performance, as well as device size, revealed that the U-type scrubber with a PM removal efficiency of 92% or higher and a pressure drop of 122 mmH2O or lower at the water levels of 6-8 cm was more economical for removing PM from grilling gas than the D-type scrubber.
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Affiliation(s)
- Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Soo-Kyung Kang
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Yun-Yeong Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Soo Yeon Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Insook Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
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15
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Wu TC, Peng CY, Hsieh HM, Pan CH, Wu MT, Lin PC, Wu CF, Hsieh TJ. Reduction of aldehyde emission and attribution of environment burden in cooking fumes from food stalls using a novel fume collector. ENVIRONMENTAL RESEARCH 2021; 195:110815. [PMID: 33524332 DOI: 10.1016/j.envres.2021.110815] [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: 04/17/2020] [Revised: 01/23/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
Uncontrolled cooking emissions from commercial kitchens are problematic due to their corresponding health effects and malodors. To reduce cooking emissions, medium and large commercial kitchens install air pollution control devices, such as electrostatic precipitators and wet scrubbers, while small-scale commercial cooking workplaces, such as street-food stalls, use smaller, simpler, and less costly filtration and absorption devices. However, these smaller devices may be poorly designed and recirculate cooking emissions in the workplace. The objectives of this study were to design and implement a novel fume collector and evaluate its effectiveness in reducing aldehydes and the corresponding environmental burden emitted by food stalls. Two stalls, which had malodor problems despite the use of fume collectors, volunteered to participate in the study. To increase the efficiency of the existing fume collectors, a new collector was designed comprising two buckets connected in series, each with pollutant absorption (NaClO-surfactant mixed solution) and particulate filtration (activated-carbon filters) components. Total aldehyde concentrations measured at the exhaust outlets of the original and new collectors were 342.2 and 80.8 μg/m3 for stall A, and 622.7 and 283.1 μg/m3 for stall B, respectively. The corresponding concentration reductions for stall A and B were 76% and 55%, and the emission rate reductions were 91% (from 749 to 71 g/yr) and 76% (from 1040 g/yr to 248 g/h), respectively. These results demonstrate that the effectiveness of the novel collector at removing cooking fumes was significantly improved. The high efficiency and low-cost nature of the collector make it highly applicable in small-scale commercial kitchens and street-food stalls.
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Affiliation(s)
- Te-Cheng Wu
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Chiung-Yu Peng
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Hui-Min Hsieh
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Chih-Hong Pan
- Institute of Labor, Occupational Safety and Health, Ministry of Labor, No. 99, Ln. 407, Hengke Rd., Sijhih District, New Taipei City, Taiwan.
| | - Ming-Tsang Wu
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan; Department of Family Medicine, Kaohsiung Medical University Hospital, 100, Tzyou 1st Road, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Pei-Chen Lin
- Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Chia-Fang Wu
- Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
| | - Tusty-Jiuan Hsieh
- Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd, Kaohsiung, Taiwan.
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16
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Can-Terzi B, Ficici M, Tecer LH, Sofuoglu SC. Fine and coarse particulate matter, trace element content, and associated health risks considering respiratory deposition for Ergene Basin, Thrace. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 754:142026. [PMID: 33254949 DOI: 10.1016/j.scitotenv.2020.142026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 05/21/2023]
Abstract
Ergene Basin is located in Thrace, Turkey, where industries are densely populated. This study aimed to determine exposure of people living in Ergene Basin (Çorlu and Çerkezköy) to fine and coarse PM, and its potentially toxic element (PTE) content by considering variation in respiratory airway deposition rates with daily activities and PM particle size by employing deposition models of International Commission on Radiological Protection and Multiple Path Particle Dosimetry. Fine and coarse PM samples were collected daily for a year at points in Çorlu and Çerkezköy representing urban and industrial settings, respectively. A questionnaire survey was conducted in the study area to obtain time-activity budgets, and associated variation was included in the health risk assessment by considering time-activity-dependent inhalation rates. The studied PTEs were Al, As, Ba, Cd, Cr, Co, Mn, Ni, Pb, and Se. The mean fine and coarse PM concentrations were measured as 23 and 14 μg/m3 in Çorlu, and 22 and 12 μg/m3 in Çerkezköy, respectively. The only PTE that exceeded acceptable risk in terms of total carcinogenic risk was Cr. Non-carcinogenic risks of all the PTEs including Cr were below the threshold. The use of deposition fractions in the health risk assessment (HRA) calculations was found to prevent overestimation of health risks by at least 91% and 87% for fine and coarse PM, respectively, compared to the regular HRA. Minor differences in risk between Çorlu and Çerkezköy suggest that urban pollution sources could be at least as influential on human health as industrial sources.
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Affiliation(s)
- Begum Can-Terzi
- Dept. of Environmental Engineering, Izmir Institute of Technology, Urla, Izmir, Turkey
| | - Merve Ficici
- Dept. of Environmental Engineering, Namık Kemal University, Corlu, Tekirdag, Turkey
| | - Lokman Hakan Tecer
- Dept. of Environmental Engineering, Namık Kemal University, Corlu, Tekirdag, Turkey.
| | - Sait C Sofuoglu
- Dept. of Environmental Engineering, Izmir Institute of Technology, Urla, Izmir, Turkey.
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17
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Comparison of Low-Cost Particulate Matter Sensors for Indoor Air Monitoring during COVID-19 Lockdown. SENSORS 2020; 20:s20247290. [PMID: 33353048 PMCID: PMC7766947 DOI: 10.3390/s20247290] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/01/2020] [Accepted: 12/15/2020] [Indexed: 11/16/2022]
Abstract
This study shows the results of air monitoring in high- and low-occupancy rooms using two combinations of sensors, AeroTrak8220(TSI)/OPC-N3 (AlphaSense, Great Notley, UK) and OPC-N3/PMS5003 (Plantower, Beijing, China), respectively. The tests were conducted in a flat in Warsaw during the restrictions imposed due to the COVID-19 lockdown. The results showed that OPC-N3 underestimates the PN (particle number concentration) by about 2-3 times compared to the AeroTrak8220. Subsequently, the OPC-N3 was compared with another low-cost sensor, the PMS5003. Both devices showed similar efficiency in PN estimation, whereas PM (particulate matter) concentration estimation differed significantly. Moreover, the relationship among the PM1-PM2.5-PM10 readings obtained with the PMS5003 appeared improbably linear regarding the natural indoor conditions. The correlation of PM concentrations obtained with the PMS5003 suggests an oversimplified calculation method of PM. The studies also demonstrated that PM1, PM2.5, and PM10 concentrations in the high- to low-occupancy rooms were about 3, 2, and 1.5 times, respectively. On the other hand, the use of an air purifier considerably reduced the PM concentrations to similar levels in both rooms. All the sensors showed that frying and toast-making were the major sources of particulate matter, about 10 times higher compared to average levels. Considerably lower particle levels were measured in the low-occupancy room.
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