Results 261 to 270 of about 242,468 (294)

Variations of CO and O3 in the troposphere: Evidence of O3 photochemistry

Atmospheric Environment (1967), 1986
The possibility of a long term evolution for tropospheric ozone, connected to a rise of anthropogenic releases, raises the question of a human climatic action. In order to bring an experimental confirmation to photochemical theories, continuous CO and O3 measurements were started in November at the Pic du Midi observatory (3000 m altitude in the ...
openaire   +1 more source

Nitrogen-Doped Graphene Quantum Dots Enhance the Activity of Bi2 O3 Nanosheets for Electrochemical Reduction of CO2 in a Wide Negative Potential Region.

Angewandte Chemie, 2018
Large numbers of catalysts have been developed for the electrochemical reduction of CO2 to value-added liquid fuels. However, it remains a challenge to maintain a high current efficiency in a wide negative potential range for achieving a high production ...
Zhipeng Chen, K. Mou, Xiaohan Wang, Licheng Liu   +3 more
semanticscholar   +1 more source

Satellite-based estimation of full-coverage ozone (O3) concentration and health effect assessment across Hainan Island

, 2020
Ambient ozone (O3) poses great damage to human health, biodiversity, and climate change. Although the health risk due to O3 pollution has been widely evaluated, the spatiotemporal variation of O3 level and its potential health impact in a remote tropical
Rui Li, Lulu Cui, Hongbo Fu, Junlin Li, Yilong Zhao, Jianmin Chen   +5 more
semanticscholar   +1 more source

A comparative study on the degradation of ethyl xanthate collector by O3, UV254nm, UV185+254nm, O3/UV254nm and O3/UV185+254nm processes

Journal of Environmental Chemical Engineering, 2020
To separate sulfide minerals from ores, xanthates are widely used as flotation collectors in global mining industry. However, nearly half of xanthates dosed into flotation circuits are discharged into flotation effluents.
Pingfeng Fu, Lianghua Wang, Yanhong Ma, Zongwu Hou   +3 more
semanticscholar   +1 more source

Enhanced treatment of landfill leachate wastewater using sono(US)-ozone(O3)–electrocoagulation(EC) process: role of process parameters on color, COD and electrical energy consumption

, 2020
The combination of advanced oxidation processes (AOPs) and electrochemical process is gaining growing popularity for use in wastewater treatment. The present work explores for the first time, treatment of leachate wastewater from landfill waste using a ...
P. Asaithambi, Rajendran Govindarajan, Mamuye Busier Yesuf, P. Selvakumar, Esayas Alemayehu   +4 more
semanticscholar   +1 more source

Gas-Phase Kinetics of O3 + C2H2 and O3 + H2C=CCl2

Journal of Chemical Education, 2000
Ozone plays a significant role in the troposphere by oxidizing many organic compounds. While reactions between O3 and saturated hydrocarbons are very slow, reactions between O3 and unsaturated hydrocarbons are sometimes fast enough to be atmospherically significant. This report describes an experiment for the physical chemistry laboratory that measures
Joel D. Burley, Alisa M. Roberts
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The Cl2 photosensitized decomposition of O3: the reactions of ClO and OClO with O3

Journal of Photochemistry, 1979
Abstract Cl2 was photolyzed in the temperature range 254 – 296 K with 366 nm radiation in the presence of O3· O3 was removed with quantum yields of 5.8 ± 0.5, 4.0 ± 0.3, 2.9 ± 0.3 and 1.9 ± 0.2 at 24, 10,0 and—21 °C respectively, independent of the initial O3 or Cl2 removal quantum yields were 0.11 ± 0.2 at 24 °C for Cl2 conversions of about 30 ...
Wanee Wongdontri-Stuper, R.K.M. Jayanty, R. Simonaitis, Julian Heicklen   +3 more
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Ozon O3

1918
auch aktiver Sauerstoff genannt, vom Siedepunkt −119°, spezifisches Gewicht des Gases = 1,658 (Luft = 1), Molekulargewicht 48, wurde schon 1785 von Marum beim Durchschlagen elektrischer Funken durch Sauerstoff beobachtet, 1840 von Schonbein als Beimengung in dem elektrolytisch entwickelten Sauerstoff aufgefunden und von Marignac und Delarive als eine ...
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Multivariate Outliers and the O3 Plot

Journal of Computational and Graphical Statistics, 2019
Identifying and dealing with outliers is an important part of data analysis. A new visualization, the O3 plot, is introduced to aid in the display and understanding of patterns of multivariate outl...
openaire   +2 more sources

Controlled O3 Exposures and Field Observations of O3 Effects in the UK

1997
Damage caused by air pollution to conifers in the UK was first recorded by Cohen and Ruston (1912), and it has long been known that one of the most serious effects of air pollution on conifers is increased susceptibility to cold injury and drought (Munch 1933; Lux 1965) including winter desiccation.
A. R. Wellburn, J. D. Barnes, P. W. Lucas, A. R. Mcleod, T. A. Mansfield   +4 more
openaire   +1 more source