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| http://dx.doi.org/10.1016/j.puhip.2020.100008 | DOI Listing |
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Classroom air quality in a randomized crossover trial with portable HEPA air cleaners.
J Expo Sci Environ Epidemiol
January 2025
Department of Environmental and Occupational Health, Joe C. Wen School of Population & Public Health, University of California, Irvine, CA, USA.
Background: Children living in communities with lower socioeconomic status and higher minority populations are often disproportionately exposed to particulate matter (PM) compared to children living in other communities.
Objective: We assessed whether adding HEPA filter air cleaners to classrooms with existing HVAC systems reduces indoor air pollution exposure.
Methods: From July 2022 to June 2023, using a block randomized crossover trial of 17 Los Angeles Unified School District elementary schools, classroom PM concentrations were monitored and compared for 99 classrooms with HEPA filter air cleaners and 87 classrooms with non-HEPA filter air cleaners.
Land cover changes reduce dust aerosol concentrations in northern China (2000-2020).
Environ Res
January 2025
Henan Key Laboratory of Air Pollution Control and Ecological Security, Henan University, Kaifeng, Henan, 475004, China; Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, Henan, 475004, China. Electronic address:
Dust aerosols significantly impact climate, human health, and ecosystems, but how land cover (LC) changes influence dust concentrations remains unclear. Here, we applied the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) to assess the effects of LC changes on dust aerosol concentrations from 2000 to 2020 in northern China. Based on LC data derived from multi-source satellite remote sensing data, we conducted two simulation scenarios: one incorporating actual annual LC changes and another assuming static LC since 2000.
View Article and Find Full Text PDFSummer Heatwave, Ozone Pollution and Ischemic Stroke Mortality: An Individual-Level Case-Crossover Study.
Environ Res
January 2025
School of Public Health, Wuhan University of Science and Technology, Wuhan 430065, China. Electronic address:
Background: Although the association of short-term ozone and heatwave exposure with cerebrovascular disease has been well documented, it remains largely unknown whether their co-exposure could synergistically trigger ischemic stroke (IS) mortality.
Methods: We performed an individual-level, time-stratified case-crossover analysis utilizing province-wide IS deaths (n =59079) in warm seasons (May-September) during 2016-2019, across Jiangsu, eastern China. Heatwave was defined according to a combination of multiple temperature thresholds (90-97.
Size Distribution, Chemical Composition and Influencing Factors of Vehicle Tire Wear Particles Based on a Novel Test Cycle.
Environ Res
January 2025
Tianjin Key Laboratory of Urban Transport Emission Research & State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071.
Tire wear particles (TWPs) are considered the one of most significant non-exhaust particle emission sources from vehicles. However, there is a lack of research on the emission characteristics of TWPs based on typical driving information. In this work, we used a high-dynamic outside wheel test platform to conduct tire wear tests on multiple types of tires based on a novel test cycle and comprehensively analyzed the differences in their emission characteristics while considering various factors, such as front/rear tire and tire type.
View Article and Find Full Text PDFBioelectronic and photogenerated electron synergistic catalyzed removal of chlorhexidine: Degradation and mechanism.
J Hazard Mater
January 2025
College of Water Sciences, Beijing Normal University, Beijing 100875, China; Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai 519087, China; National University of Singapore, Department of Civil and Environmental Engineering, 1 Engineering Drive 2, 117576, Singapore. Electronic address:
The extensive use of the antimicrobial compound chlorhexidine (CHD) has emerged as a significant threat to both the ecological environment and human health. To address this concern, a photo-electrochemical cell-microbial fuel cell (PMFC) system was studied for CHD removal by incorporating, for the first time, the photocatalysts black phosphorus/carbon nitride (BPCN) and CuO into the bioanode and air cathode of an MFC, respectively. By combining electrochemical, macro-genomic, and intermediate product analyses, the underlying mechanisms of bioelectronic and photoelectronic synergies were elucidated.
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