Article
Construction & Building Technology
Zhiwei Zhang, Xinba Lv, Zhiyi Wei, Jun Guan, Yinghui Zhang, Shuqin Chen, Hongyang He
Summary: The study found that outdoor air temperature is a key factor influencing occupants' window-opening behaviors in residences, with most preferring to use range hood accompanied by opening kitchen window for ventilation. Indoor UFP concentrations were significantly higher in winter compared to summer and transition season, correlating with cooking activities.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Noel J. Aquilina, Sara Fenech Camilleri
Summary: This study presents measurements of outdoor and indoor particulate matter and Black Carbon in a typical terraced house in an urban area of Malta. It also analyzed the influence of different household activities on indoor PM2.5 and BC levels, finding that activities such as sweeping and cooking can lead to elevated indoor pollutant concentrations. Given the increasing amount of time people spend at home, identifying and limiting activities that contribute to indoor pollution is crucial to reduce indoor exposure.
BUILDING AND ENVIRONMENT
(2022)
Review
Environmental Sciences
Sabyne Audignon-Durand, Olivier Ramalho, Corinne Mandin, Audrey Roudil, Olivier Le Bihan, Fleur Delva, Aude Lacourt
Summary: Ultrafine particles pose a growing concern due to their potential toxicity. This study provides a comprehensive summary of indoor exposure to these particles in highly industrialized countries. It identifies activities such as cooking, smoking, and cleaning as major contributors to indoor ultrafine particle exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Brian Stacey, Roy M. Harrison, Francis D. Pope
Summary: This study found high concentrations of ultrafine particles (UFP) at Heathrow Airport in London, exceeding the exposure limits set by the World Health Organization (WHO). Departing aircraft, particularly larger ones, were found to have the highest UFP emission rates. The number of passengers carried also influenced emission rates per passenger. Calculated emission rates were higher than literature values due to the inclusion of condensable particles in the measurements. The study suggests that UFP concentrations beyond the airport boundary may also be of concern, and assessing population exposure near airports will become increasingly important in the future.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Engineering, Chemical
Julia Szabadi, Joerg Meyer, Martin Lehmann, Achim Dittler
Summary: This paper focuses on the simultaneous, time- and space-resolved measurements of particle size distributions in different closed indoor environments using mobile air filters. The experiments show that these air filters, equipped with high-performance filter media, efficiently remove submicron particles over time. However, the real-room scenarios reveal slower particle decay than predicted, and the filters cannot prevent close distance transmission of submicron aerosol particles.
JOURNAL OF AEROSOL SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Honglei Wang, Yuxuan Pei, Yan Yin, Lijuan Shen, Kui Chen, Zheng Shi, Jinghua Chen
Summary: This study reveals the process of new particle formation in the atmosphere during lightning flashes, showing that lightning leads to the formation of ultrafine particles in the atmosphere and influences the chemical composition of atmospheric aerosols and air quality.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Su-Gwang Jeong, Lance Wallace, Donghyun Rim
Summary: Indoor ultrafine particles mainly come from occupant activities and can cause health problems. This study investigates the dynamics of ultrafine particles released from different indoor sources and the impact of aerosol loss mechanisms on their size distribution dynamics.
ENVIRONMENTAL POLLUTION
(2023)
Article
Green & Sustainable Science & Technology
Fabio Boccuni, Riccardo Ferrante, Francesca Tombolini, Sergio Iavicoli, Armando Pelliccioni
Summary: This study focused on real-time high-frequency UFPs particle size distribution in an indoor site, revealing that accumulation mode (AM) of UFPs during working days contributes significantly to the total particle number concentration, showing a high correlation with polycyclic aromatic hydrocarbons (PAHs) contribution. Additionally, high indoor TPNC values were recorded during rush hours, potentially due to outdoor influences from anthropogenic activities.
Article
Construction & Building Technology
William W. Nazaroff
Summary: Ultrafine particles are small condensed-phase materials in air that are abundant both indoors and outdoors. They pose health risks when inhaled and can migrate within the respiratory tract. Buildings provide partial protection against outdoor ultrafine particles, but their effectiveness is influenced by various factors.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Sabrina Westgate, Nga Lee Ng
Summary: This study used low-cost sensors to continuously measure size-resolved particulate matter and carbon dioxide in a university classroom. The decay time constant of each pollutant was determined using occupant-generated emissions, and the results showed that quantifying metabolic CO2 decay is a viable method to estimate the timescale of indoor aerosol decay. Both CO2 and particulate matter provided comparable air change rate estimates.
BUILDING AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Julija Pauraite, Gediminas Mainelis, Simonas Kecorius, Agne Minderyte, Vadimas Dudoitis, Inga Garbariene, Kristina Plauskaite, Jurgita Ovadnevaite, Steigvile Bycenkiene
Summary: The study observed the impact of climate change on wildfires and resulting air pollution, as well as the performance of indoor air filtering systems under intensive smoke conditions. The research found that during smoke events, both indoor and outdoor eBC mass concentrations increased, with air filtering efficiency highly dependent on particle size.
Article
Environmental Sciences
Dong Kim, Jeongju Kim, Sang Joon Lee
Summary: The study showed that submicron water droplets are effective in removing indoor ultrafine particulate matter, with a removal efficiency approximately twice as high as micron-sized water droplets. The results also indicated that as the size of water droplets decreases, the efficiency of particulate matter collection increases significantly.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Amir Nourian, Muhammad Kabir Abba, Ghasem G. Nasr
Summary: Non-Methane Volatile Organic Compounds (NMVOCs) from domestic aerosol sprays are harmful pollutants, with cosmetic category having the highest concentration. Water-based products contain fewer organic compounds compared to solvent-based products. Replacing Liquefied Petroleum Gas (LPG) propellants with nitrogen can reduce emissions by 50%.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Construction & Building Technology
Aminhossein Jahanbin, Giovanni Semprini
Summary: This study investigates the combined effects of ventilation and heat source on indoor particle dispersion. The impact of different heating systems on particle decay rate was evaluated and compared. The results showed that increasing the ventilation rate can weaken the influence of heating system on particle decay rate.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Construction & Building Technology
Xiaopu Lyu, Yunxi Huo, Jin Yang, Dawen Yao, Kaimin Li, Haoxian Lu, Yangzong Zeren, Hai Guo
Summary: This study focused on the molecular composition, source emissions, and chemical aging of air pollutants in a residence designed to replicate activities found in ordinary Hong Kong homes. More than 150 air pollutants were detected, with 87 quantified at a time resolution of not less than 1 hour. Indoor-to-outdoor ratios for primary air pollutants were generally higher than 1 due to indoor activities and backgrounds, while many secondary pollutants exhibited higher concentrations outdoors. Activities like painting and incense burning were found to be major emission sources for certain pollutants. Results also indicated evidence of chemical aging of cooking emissions, suggesting indoor heterogeneous chemistry. High time resolution measurements of organic molecules were emphasized for enhancing understanding of indoor air quality.
Article
Environmental Sciences
Maud Pelletier, Philippe Glorennec, Corinne Mandin, Barbara Le Bot, Olivier Ramalho, Fabien Mercier, Nathalie Bonvallot
ENVIRONMENT INTERNATIONAL
(2018)
Review
Environmental Sciences
Wenjuan Wei, Nathalie Bonvallot, Asa Gustafsson, Gaelle Raffy, Philippe Glorennec, Annette Krais, Olivier Ramalho, Barbara Le Bot, Corinne Mandin
ENVIRONMENT INTERNATIONAL
(2018)
Article
Construction & Building Technology
Wenjuan Wei, Olivier Ramalho, Corinne Mandin
BUILDING AND ENVIRONMENT
(2019)
Article
Environmental Sciences
Wenjuan Wei, Corinne Mandin, Olivier Blanchard, Fabien Mercier, Maud Pelletier, Barbara Le Bot, Philippe Glorennec, Olivier Ramalho
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Construction & Building Technology
Mengjie Duan, Li Liu, Guillaume Da, Evelyne Gehin, Peter V. Nielsen, Ulla M. Weinreich, Borong Lin, Yi Wang, Ting Zhang, Wei Sun
Article
Engineering, Electrical & Electronic
Ugur Soysal, Frederic Marty, Evelyne Gehin, Charles Motzkus, Emmanuelle Algre
MICROELECTRONIC ENGINEERING
(2020)
Article
Engineering, Chemical
Ugur Soysal, Evelyne Gehin, Frederic Marty, Emmanuelle Algre, Enric Robine, Charles Motzkus
Summary: This study analyzed the deposition patterns of aerosolized bacteria, fungi, and fluorescent particles with a lab-made impactor, finding that the impaction characteristics of aerosols are influenced by particle size. The experiment proposes tailoring the impaction surface to eliminate the bounce effect and localize particle deposits in the primary zone.
AEROSOL SCIENCE AND TECHNOLOGY
(2021)
Review
Construction & Building Technology
Khansa Mahjoub Mohammed Merghani, Benoit Sagot, Evelyne Gehin, Guillaume Da, Charles Motzkus
Summary: In the last two decades, multidisciplinary research teams have worked on developing a comprehensive understanding of the transmission mechanisms of airborne diseases, focusing on the characterization of exhaled airflow and droplets. Different techniques have been applied to visualize and quantify the airflow field and droplets' characteristics, but there is still a lack of thorough experimental investigation on the evolution of droplets' size and velocity away from the source, as well as the temperature and humidity fields formed by the interaction of exhaled airflow and ambient air.
Review
Engineering, Chemical
D. Costa, J. Malet, E. Gehin
Summary: Localizing and measuring aerosol deposition is crucial for understanding contaminants and their transfer mechanisms, as well as improving cleanliness and health. Various techniques exist for measuring aerosol deposition, but only a few can directly measure deposition without altering it. Micro-sensors are a key focus in current research on aerosol deposition.
AEROSOL SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
J. Malet, M. Radosavljevic, M. Mbaye, D. Costa, J. Wiese, E. Gehin
Summary: This paper studies the effect of singularities on flow in an industrial-scale rectangular ventilation network. The results show that the singularities significantly impact the velocity profiles and flow distribution.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Multidisciplinary
Delphine Costa, Jeanne Malet, Evelyne Gehin
Summary: This paper presents an experimental protocol for measuring aerosol deposition in large-scale ventilation ducts. A new experimental method is proposed for industrial-sized rectangular ducts, which differs from previous protocols for smaller ducts. The protocol focuses on the collection of deposited aerosols using a wiping technique and includes verification and validation processes. Results obtained from a test facility are compared with other studies.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Wenjuan Wei, John C. Little, Melanie Nicolas, Olivier Ramalho, Corinne Mandin
Summary: The use of liquid products on material surfaces and human skin can result in emissions of chemicals in indoor air. Existing models do not allow for comparison of different scenarios and mechanisms. This study developed a mechanistic model based on mass transfer theories to characterize emissions from liquid products into the air. The model was validated using data on chemical emissions and a sensitivity analysis was conducted. The percentage of emitted chemical mass varied depending on the surface and the peak gas-phase concentration and emission time depended on the properties of the chemical and the surface.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Construction & Building Technology
Thi Hao Nguyen, Anda Ionescu, Evelyne Gehin, Olivier Ramalho
Summary: In this study, the opening state of five windows in a real open-plan office was modeled using three machine learning models. The previous 24-hour environmental factors and the current time were used to predict the current state of the windows. The results showed that the window status, current time, and previous 24-hour mean outdoor air temperature were the most relevant factors.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Chemical
Emmanuel Belut, Noredine Rekeb, Benjamin Sutter, Evelyne Gehin
Summary: This article revisits the simulation of a dichotomous sampler for gas and aerosol mixture, investigating the factors influencing the representativeness of the simulations. The results show that the axisymmetric simplification holds and the turbulence model significantly affects the predicted flow pattern. The inlet boundary condition plays a decisive role in aerosol motion, and free-sampling conditions help in limiting wall deposition for particles with aerodynamic diameters above 2 μm.
JOURNAL OF AEROSOL SCIENCE
(2022)
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)
