scholarly journals Composés organiques volatils : des mécanismes moléculaires intriqués au centre de la complexité de la chimie troposphérique

2021 ◽  
pp. 035
Author(s):  
Jean-François Doussin
Keyword(s):  
Air Pollution ◽  
Atmospheric Environment ◽  
Grand Nombre ◽  
Research Strategies ◽  
Pollution De L’Air ◽  
Modern Times ◽  
Number Of Components ◽  
Secondary Pollution ◽  
Pollution Atmosphérique

La pollution de l'air demeure l'un des principaux fléaux des temps modernes. Outre la pollution atmosphérique dite « primaire » se développe aussi une pollution atmosphérique plus pernicieuse, appellée « secondaire », produite dans l'environnement atmosphérique. Elle est le fruit d'une chimie atmosphérique multiphasique, impliquant des composés organiques et radicalaires, rendue complexe à la fois par le grand nombre de composants de l'air et par la multiplicité de leurs voies d'évolution chimique. En mettant en perspective cette complexité, cet article se propose de donner quelques clefs pour l'appréhender et de présenter les stratégies de la recherche qui permettront de réduire cette pollution secondaire. Air pollution remains one of the main plagues of modern times. In addition to so-called "primary" air pollution, a more pernicious air pollution is also developing, termed "secondary", i.e. produced in the atmospheric environment. It is the result of an atmospheric multiphase chemistry involving organic and radical compounds, made complex both by the large number of components in the air and the multiplicity of their chemical pathways. Putting this complexity into perspective, this article provides some keys to understand it and to present research strategies that will reduce this secondary pollution.

scholarly journals Les vents au Sart Tilman et leur incidence sur la pollution atmosphérique

2005 ◽  
Vol 12 (25) ◽  
pp. 123-139
Author(s):  
A. Laurent
Keyword(s):  
Pollution De L’Air ◽  
Pollution Atmosphérique

L'auteur a analysé en détail les anémogrammes d'une station météorologique pendant une année. Les vents sont classés suivant leur persistance et leurs directions pendant les heures de la journée et des corrélations sont établies entre leurs vitesses, leurs directions et leurs fréquences. Ce mode de dépouillement statistique original présente un grand intérêt pour les études de pollution de l'air.

Analysis of the Stones of Thousand Hand Buddhism by the Combination of On-Site and Laboratory Techniques

2012 ◽  
Vol 557-559 ◽  
pp. 1461-1466
Author(s):  
Xing Ling Tian ◽  
Nai Sheng Li ◽  
Zhi Guo Zhang ◽  
Yuan Hu ◽  
Chang Fa Zhan
Keyword(s):  
Air Pollution ◽  
Quantitative Analysis ◽  
Surface Morphology ◽  
Ion Chromatography ◽  
Inorganic Anions ◽  
Atmospheric Environment ◽  
Laboratory Techniques ◽  
Chongqing City ◽  
Laboratory Results ◽  
World Cultural Heritage

As world cultural heritage, Thousand Hand Buddhism in Dazu County of Chongqing City has been eroded Seriously after exposure to Wet atmospheric environment for about 800 years. In order to protect it, the reason of erosion should be found first. So the stones of Thousand Hand Buddhism have been analyzed using both on-site techniques(3D video microscopy, portable IR and so on) and laboratory techniques(SEM,AES and Ion chromatography etc.), and the limitations of all the above techniques are discussed. The on site results show that the stones are sandstones which contain montmorillonite, and the surface morphology of stones has changed significantly. The laboratory results show that many acidic inorganic anions can be found. and the content of SO42-is highest among all the inorganic anions, which indicates that the SO2 in the wet air should attend the reaction of the erosion. All the results show that air pollution in the Wet atmospheric environment should be the main reason of the erosion, and that on site techniques have the characteristic of nondestructive, while laboratory techniques can do more Quantitative analysis, only when they are combined can the stone relics be analyzed scientificly.This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Influence of Air Pollution on Tree Physiology/Influence de Pollution de L’Air au Physiologie de L’Arbre

1988 ◽  
pp. 907-909
Author(s):  
P. Evers ◽  
P. Cortes ◽  
H. v.d. Beek ◽  
W. Jans ◽  
J. Donkers ◽  
...  
Keyword(s):  
Air Pollution ◽  
Tree Physiology ◽  
Pollution De L’Air

Corrigendum to ‘Mortality and air pollution in Beijing: The long-term relationship’ [Atmospheric Environment 150C (2017) 238–243]

2017 ◽  
Vol 157 ◽  
pp. 167 ◽  
Author(s):  
Guiqian Tang ◽  
Pusheng Zhao ◽  
Yinghong Wang ◽  
Wenkang Gao ◽  
Mengtian Cheng ◽  
...  
Keyword(s):  
Air Pollution ◽  
Atmospheric Environment

Air pollution and health risk assessment in Northeastern China: A case study of Jilin Province

2021 ◽  
pp. 1420326X2097927
Author(s):  
Li Bai ◽  
Chunhui Li ◽  
Chuck Wah Yu ◽  
Zijian He
Keyword(s):  
Air Pollution ◽  
Principal Components ◽  
Risk Model ◽  
Temporal Distribution ◽  
Principal Component ◽  
Northeastern China ◽  
Jilin Province ◽  
Atmospheric Environment ◽  
Annual Data ◽  
Model Calculations

In recent years, the pollution of the air environment has been increasing, which has seriously endangered human health. The large amount of coal burning and automobile exhaust emissions in winter have caused serious regional pollution, which has greatly increased the prevalence of respiratory disease of people. The purpose of this study is to use Jilin Province as an example to map out the environmental pollution status in Northeastern China, and to provide suggestions for the improvement of the atmospheric environment. Using the annual data of China's atmospheric monitoring, the atmospheric environment in Jilin was comprehensively analysed using ArcGIS, principal component analysis (PCA) and non-carcinogenic risk model calculations. The results showed that the temporal distribution of pollutants was winter > spring > autumn > summer, and the spatial distribution is decreasing from northwest to southeast. The PCA showed that the first principal components were PM2.5 and CO, and the second principal components were PM10 and O3. The main sources of air pollution were coal-fired (62.365%) and automobile emissions (19.153%). The non-carcinogenic risks of pollutants are all within the acceptable range (1 × 10−6), but as age increases, the risk gradually decreases, and the risk value of male is higher than that of female.

Sign in / Sign up

Export Citation Format

Share Document