نتایج جستجو برای: gaseous pollutants
تعداد نتایج: 38626 فیلتر نتایج به سال:
According to the procedures conducting the test for durability of emission control systems (Annex II Commission Directive 2005/78/ EC of 14 November 2005 implementing Directive 2005/55/EC of the European Parliament and of the Council on the approximation of the laws of the Member States relating to the measures to be taken against the emission of gaseous and particulate pollutants from compress...
Over the past two decades there has been increasing interest in studies regarding effects on human health of climate changes and urban air pollution. Climate change induced by anthropogenic warming of the earth’s atmosphere is a daunting problem and there are several observations about the role of urbanization, with its high levels of vehicle emissions and other pollutants, and westernized life...
Acid rain, which is a wet form of gaseous air pollutants, is formed when air pollutants such as SO2, NO2, CO2 in the atmosphere combine with water vapor of clouds. With the increase of concentration of these pollutants, the amount of acid rain increases. Acid rain, which is the mixture of sulphuric, nitric and carbonic acids, results in some changes in the soil such as decrease in pH, uncommon ...
Some current methods for the determination of both particulate and gaseous compounds of fluorine, present in air as pollutants, are described and compared. The operation included sampling of the air, the separation of fluoride from interfering substances and its final determination. Results obtained for the separation of fluoride by distillation and by other techniques of microdiffusion are pre...
Extensive research has also been done on the pollution attenuation capability of different tree species [2-5].But, in comparison, much less is known on how to maximize gains from a greenbelt. The normal proactive is to put a circular ring of trees around a pollution source. But it is easy to see that such an approach is likely to have limited utility, if at all. This is because dispersion of pa...
The concentrations of smoke, polycyclic aromatic hydrocarbons (PAHs), and some gaseous air pollutants have been measured in two London Transport diesel bus garages and compared with observations made in the same garages over 20 years earlier. The main feature of the results was a large reduction in the background concentrations of smoke and polycyclic aromatic hydrocarbons from sources such as ...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
Air pollution is a precursor to many health issues such as difficulty breathing, asthma, lung and heart diseases, cancer. This study presents concise view of biodiesel combustion in mitigating pollutant emissions which are generated by the fossil fuels, thereby eliminating negative effects on human environment. Gaseous pollutants carbon monoxide, unburned hydrocarbons, nitrogen oxides, particul...
Captan belongs to an important group of sulfcnimidc fungicides, commonly used on major crops, fruits and ornamentals. In this study, a laboratory scale apparatus has been constructed to investigate the thermal decomposition of captan in gas phase reactions, similar to those that occur in fires, burning of wood and other biomass treated or contaminated with pesticides. The apparatus comprises a ...
Increased interest over the levels of pharmaceuticals detected in the environment has led to the need for new approaches to manage their emissions. Inappropriate disposal of unused and waste medicines and release from manufacturing plants are believed to be important pathways for pharmaceuticals entering the environment. In situ treatment technologies, which can be used on-site in pharmacies, h...
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