Article
Engineering, Environmental
Benjamin Krebs, Jennifer Burney, Joshua Graff Zivin, Matthew Neidell
Summary: The study found that an increase in outdoor PM concentration significantly affects indoor concentrations, with penetration almost complete within 5 hours. Additionally, building age and surrounding climatic conditions are associated with penetration rates.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Paola Fermo, Begona Artinano, Gianluigi De Gennaro, Antonio Marco Pantaleo, Alessandro Parente, Fiorella Battaglia, Elena Colicino, Gianluca Di Tanna, Andouglas Goncalves da Silva Junior, Igor Gadelha Pereira, Gabriel Santos Garcia, Luiz Marcos Garcia Goncalves, Valeria Comite, Alessandro Miani
Summary: The study tested a commercial system as an air purifier and found that it significantly reduced PM and VOCs concentrations in the air by about 90% and over 50%, respectively.
ENVIRONMENTAL RESEARCH
(2021)
Article
Construction & Building Technology
Weixin Zhao, Panu Mustakallio, Sami Lestinen, Simo Kilpelainen, Juha Jokisalo, Risto Kosonen
Summary: The challenge of air distribution in classrooms is to ensure ventilation performance under different usage conditions. This study compares the indoor climate in summer and winter conditions with different occupancy densities using different air suppliers. The results show that displacement ventilation performs the best in the occupied zone and achieves a higher air change efficiency compared to other air diffusers. Ceiling diffusers also provide a reasonably low air velocity and uniform indoor climate.
Article
Environmental Sciences
Nuodi Fu, Moon Keun Kim, Long Huang, Jiying Liu, Bing Chen, Stephen Sharples
Summary: This study conducted experimental and numerical analyses on the influence of outdoor air pollutants levels, infiltration rate, and occupants' behaviours on indoor air quality. It also established a numerical model to validate the research findings.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Construction & Building Technology
Ao Zhang, Yumeng Liu, Bin Zhao, Yinping Zhang, Haidong Kan, Zhuohui Zhao, Furong Deng, Chen Huang, Xiangang Zeng, Yuexia Sun, Hua Qian, Wei Liu, Jinhan Mo, Chanjuan Sun, Xiaohong Zheng
Summary: The study systematically reviewed indoor PM2.5 concentrations in residences, offices, and schools in China, and found that urban areas mainly located in the middle and eastern part of China, while rural areas located in northeast, north, and southwest China. The study also revealed that indoor PM2.5 concentrations have significantly decreased in the past decades, with rural areas showing much higher levels compared to urban areas. The authors recommend a long-term national indoor PM2.5 concentration measurement for a comprehensive and accurate understanding of indoor PM2.5 concentrations.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
E. Caracci, L. Canale, G. Buonanno, L. Stabile
Summary: This study aimed to bridge the gap between lack of awareness and understanding of how occupant behavior affects indoor air quality (IAQ). An evaluation of IAQ awareness and an investigation of an eco-feedback strategy were conducted. The results showed that occupants were not properly aware of IAQ in their homes, but the eco-feedback strategy successfully promoted behavioral changes and reduced particle concentration during cooking activities.
BUILDING AND ENVIRONMENT
(2022)
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
Environmental Sciences
Yuan-duo Zhu, Xu Li, Lin Fan, Li Li, Jiao Wang, Wen-jing Yang, Lin Wang, Xiao-yuan Yao, Xian-liang Wang
Summary: The study reveals a severe indoor air pollution problem in Chinese primary school classrooms, with high levels of PM2.5, PM10, and other pollutants exceeding recommended guidelines, particularly in regions like Shijiazhuang and Nanning. There is a need to improve ventilation in classrooms to create a healthy learning environment for students.
ENVIRONMENTAL POLLUTION
(2021)
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)
Article
Construction & Building Technology
Minjin Kong, Hakpyeong Kim, Taehoon Hong
Summary: This study examines the importance of real-time numerical data in perceiving and judging indoor air quality (IAQ). Results show that occupants are more sensitive to IAQ factors when they check the numerical data, as opposed to relying on perceived thermal comfort alone.
BUILDING AND ENVIRONMENT
(2022)
Review
Environmental Sciences
Muhammad Ubaid Ali, Siyi Lin, Balal Yousaf, Qumber Abbas, Mehr Ahmed Mujtaba Munir, Audil Rashid, Chunmiao Zheng, Xingxing Kuang, Ming Hung Wong
Summary: Ultrafine particles (UFPs) are becoming the most dominant and abundant particulate matter, with increased human exposure. Due to their small size, UFPs have significant health impacts, but knowledge about them is still lacking. Inhalation is the main exposure route, and inhaled UFPs can cause various adverse health effects.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Toby J. Carter, Dustin G. Poppendieck, David Shaw, Nicola Carslaw
Summary: Indoor surfaces play a crucial role in indoor chemistry by modifying indoor oxidant concentrations. This study investigates the impact of surface transformations on indoor gas-phase chemistry using the INCHEM-Py model. The results show that a large portion of oxidants is deposited onto indoor surfaces, and understanding their impact helps improve indoor air quality through surface selection.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Engineering, Environmental
Phuong T. M. Tran, Max G. Adam, Rajasekhar Balasubramanian
Summary: The study investigated the mitigation of indoor human exposure to outdoor PM2.5 during the smoke haze episode in Singapore, finding that indoor air cleaners were more effective in reducing health risks compared to air conditioning systems. The findings could be beneficial for public health interventions during major air pollution events.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Gen Pei, Yuan Xuan, Glenn Morrison, Donghyun Rim
Summary: Ozone-initiated oxidation reactions on indoor surfaces have a significant impact on the chemical composition of indoor air and human exposure to air toxins. This study investigates the mechanisms of ozone reactions with realistic indoor surfaces using microscope scanning and detailed Computational Fluid Dynamics (CFD) simulation. The results show that the indoor surface topography affects ozone mass transport and uptake, providing insights into indoor chemistry and air quality implications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Construction & Building Technology
Xinyu Zhuang, Yisong Xu, Li Zhang, Xin Li, Jie Lu
Summary: This research explores the movement and diffusion of indoor particles and reveals the impacts of fine particles and coarse particles on indoor air quality.
ENERGY AND BUILDINGS
(2022)
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)