Wicking Fiber Chemisorption for Air Quality Improvement

1997 ◽  
Author(s):  
Gordon Jones ◽  
Ronald Rohrbach ◽  
Peter Unger ◽  
Daniel Bause ◽  
Lixin Xue ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Air Quality Improvement

scholarly journals City-level air quality improvement in the Beijing-Tianjin-Hebei region from 2016/17 to 2017/18 heating seasons: Attributions and process analysis

2021 ◽  
Vol 274 ◽  
pp. 116523
Author(s):  
Yibo Zhang ◽  
Xue Chen ◽  
Shaocai Yu ◽  
Liqiang Wang ◽  
Zhen Li ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Process Analysis ◽  
Air Quality Improvement

scholarly journals Air quality improvement in a megacity: implications from 2015 Beijing Parade Blue pollution control actions

2017 ◽  
Vol 17 (1) ◽  
pp. 31-46 ◽  
Author(s):  
Wen Xu ◽  
Wei Song ◽  
Yangyang Zhang ◽  
Xuejun Liu ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Control Period ◽  
Emission Control ◽  
Monitoring Network ◽  
Control Measures ◽  
Integrated Analysis ◽  
Air Quality Improvement ◽  
Emission Control Measures ◽  
Control Regions

Abstract. The implementation of strict emission control measures in Beijing and surrounding regions during the 2015 China Victory Day Parade provided a valuable opportunity to investigate related air quality improvements in a megacity. We measured NH3, NO2 and PM2.5 at multiple sites in and outside Beijing and summarized concentrations of PM2.5, PM10, NO2, SO2 and CO in 291 cities across China from a national urban air quality monitoring network between August and September 2015. Consistently significant reductions of 12–35 % for NH3 and 33–59 % for NO2 in different areas of Beijing during the emission control period (referred to as the Parade Blue period) were observed compared with measurements in the pre- and post-Parade Blue periods without emission controls. Average NH3 and NO2 concentrations at sites near traffic were strongly correlated and showed positive and significant responses to traffic reduction measures, suggesting that traffic is an important source of both NH3 and NOx in urban Beijing. Daily concentrations of PM2.5 and secondary inorganic aerosol (sulfate, ammonium and nitrate) at the urban and rural sites both decreased during the Parade Blue period. During (after) the emission control period, concentrations of PM2.5, PM10, NO2, SO2 and CO from the national city-monitoring network showed the largest decrease (increase) of 34–72 % (50–214 %) in Beijing, a smaller decrease (a moderate increase) of 1–32 % (16–44 %) in emission control regions outside Beijing and an increase (decrease) of 6–16 % (−2–7 %) in non-emission-control regions of China. Integrated analysis of modelling and monitoring results demonstrated that emission control measures made a major contribution to air quality improvement in Beijing compared with a minor contribution from favourable meteorological conditions during the Parade Blue period. These results show that controls of secondary aerosol precursors (NH3, SO2 and NOx) locally and regionally are key to curbing air pollution in Beijing and probably in other mega cities worldwide.

Effects of the emergency control measures in Beijing on air quality improvement

2019 ◽  
Vol 10 (2) ◽  
pp. 580-586 ◽  
Author(s):  
Jingyu Tian ◽  
Tianqi Cai ◽  
Jing Shang ◽  
James J. Schauer ◽  
Shujian Yang ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Control Measures ◽  
Emergency Control ◽  
Air Quality Improvement

Assessment of on-road emissions of four Euro V diesel and CNG waste collection trucks for supporting air-quality improvement initiatives in the city of Milan

2012 ◽  
Vol 426 ◽  
pp. 65-72 ◽  
Author(s):  
Georgios Fontaras ◽  
Giorgio Martini ◽  
Urbano Manfredi ◽  
Alessandro Marotta ◽  
Alois Krasenbrink ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Waste Collection ◽  
Air Quality Improvement ◽  
The City

scholarly journals Air Quality Improvement in a Megacity: Implications from 2015 Beijing Parade Blue Pollution-Control Actions

2016 ◽  
Author(s):  
Wen Xu ◽  
Wei Song ◽  
Yangyang Zhang ◽  
Xuejun Liu ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Control Period ◽  
Emission Control ◽  
Monitoring Network ◽  
Control Measures ◽  
Integrated Analysis ◽  
Beijing City ◽  
Air Quality Improvement ◽  
Emission Control Measures

Abstract. The implementation of strict emission control measures in Beijing and surrounding regions during the 2015 China Victory Day Parade provided a valuable opportunity to investigate related air quality improvements in a megacity. We measured NH3, NO2 and PM2.5 at multiple sites in and outside Beijing and summarized concentrations of PM2.5, PM10, NO2, SO2 and CO in 291 cities across China from a national urban air quality monitoring network between August and September 2015. Consistently significant reductions of 12–35 % for NH3 and 33–59 % for NO2 in different areas of Beijing city during the emission control period (referred to as the Parade Blue period) were observed compared with measurements in the pre- and post-Parade Blue periods without emission controls. Average NH3 and NO2 concentrations at sites near traffic were strongly correlated and showed positive and significant responses to traffic reduction measures, suggesting that traffic is an important source of both NH3 and NOx in urban Beijing. Daily concentrations of PM2.5 and secondary inorganic aerosol (sulfate, ammonium, and nitrate) at the urban and rural sites both decreased during the Parade Blue period. Concentrations of PM2.5, PM10, NO2, SO2 and CO from the national city-monitoring network showed the largest decrease (34–72 %) in Beijing, a smaller decrease (1–32 %) in North China (excluding Beijing), and an increase (6–16 %) in other regions of China during the emission control period. Integrated analysis of modeling and monitoring results demonstrated that emission control measures made a major contribution to air quality improvement in Beijing compared with a minor contribution from favorable meteorological conditions during the Parade Blue period. These results show that controls of secondary aerosol precursors (NH3, SO2 and NOx) locally and regionally are key to curbing air pollution in Beijing and probably in other mega cities worldwide.

scholarly journals Trends of Fog and Visibility in Taiwan: Climate Change or Air Quality Improvement?

2019 ◽  
Vol 19 (4) ◽  
pp. 896-910 ◽  
Author(s):  
Maylin Maurer ◽  
Otto Klemm ◽  
Hanna L. Lokys ◽  
Neng-Huei Lin
Keyword(s):  
Climate Change ◽  
Quality Improvement ◽  
Air Quality ◽  
Air Quality Improvement

Air quality improvement and health benefit of PM2.5 reduction from the coal cap policy in the Beijing–Tianjin–Hebei (BTH) region, China

2018 ◽  
Vol 25 (32) ◽  
pp. 32709-32720 ◽  
Author(s):  
Xiurui Guo ◽  
Lijuan Zhao ◽  
Dongsheng Chen ◽  
Yuhuan Jia ◽  
Na Zhao ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Health Benefit ◽  
Air Quality Improvement ◽  
Bth Region

Evaluation of indoor air quality improvement effect by using IoT-based green wall system in classrooms

2020 ◽  
Vol 19 (4) ◽  
pp. 400-413
Author(s):  
Ho-Hyeong Yang ◽  
◽  
Min-Jung Kwak ◽  
Na-Ra Jeong ◽  
Ho-Hyun Kim
Keyword(s):  
Quality Improvement ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Green Wall ◽  
Improvement Effect ◽  
Air Quality Improvement ◽  
Wall System
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