results results showed that naderi and havashenasi stations had the highest and the lowest sulfur and nitrogen dioxide concentrations, respectively during 2012. maximum annual concentrations of sulfur and nitrogen dioxide were 173 and 58 μg/m3, respectively, which observed during winter 2012. approximately 5.6% of the respiratory mortality and copd cases happened when the sulfur and nitrogen di...

Ischemia/reperfusion injury (IRI) occurs frequently during reperfusion of ischemic myocardium, and preconditioning has been regarded as one of the best strategies to prevent myocardial injury during the ischemia/reperfusion process. Our previous studies indicated that a small dose of sulfur dioxide (SO2) used as preconditioning exerts cardioprotection. However, the mechanisms underlying the car...

Sulfur dioxide (SO2) can enhance the formation of secondary aerosols from biogenic volatile organic compounds (VOCs), but its influence on secondary aerosol formation from anthropogenic VOCs, particularly complex mixtures like vehicle exhaust, remains uncertain. Gasoline vehicle exhaust (GVE) and SO2, a typical pollutant from coal burning, are directly co-introduced into a smog chamber, in this...

The sulfur dioxide (SO2) compound is a primary environmental pollutant worldwide, whereas elemental (S) global commodity possessing variety of industrial as well commercial functions. chemical relationship between poisonous SO2 and commercially viable S has motivated this investigation using the Density Functional Theory calculation relative transition state barriers for two-step dehydro-sulfur...

<p>The Conversion of SO2 by Hydrogen Oxidation Branching Chain Reaction A.A. Arutyunyan Institute Chemical Physics after A.B. Nalbandyan NAS The Republic Armenia, 5/2 Paruyr Sevak St., Yerevan 0014, Armenia E-mail: [email protected] process SО2 conversion in the hydrogen combustion mode at following conditions T=500 oC and P<200 Torr (H2:O2:SO2:N2=10:1:1:0.5) has been studied. It i...

The catalytic reduction of SO2 to elemental sulfur by CO or CH4 over ceria-based catalysts under demanding operating conditions is reported in this paper. Cuor Ni-containing ceria catalysts have been shown before to be highly active and selective for SO2 reduction by CO in dry gas streams or in the presence of low amounts of H2O. In this work, the activity/selectivity of 10 at.%La-doped ceria, ...

The International Maritime Organization (IMO) Marine Environment Protection Committee (MEPC) and some countries have gradually strengthened the laws regulating ship exhaust emissions. The aim of this paper is to estimate the impact of an after-treatment technology exhaust gas cleaning (EGC) system on marine diesel engine emissions and the cost advantage compared to using low-sulfur fuel oil. Th...

background: air pollution in tehran, capital of iran is responsible for several diverse negative effects. it has been estab­lished that air pollution can affect human health. these health effects include increased hospital admissions due to the ex­acerba­tion of cardiac and respiratory diseases, as well as symptoms such as headache, cough, eye irritation, nausea, sputum and even death in the mo...

Natural climate variation, such as that caused by volcanoes, is the basis for identifying anthropogenic climate change. However, knowledge of the history of volcanic activity is inadequate, particularly concerning the explosivity of specific events. Some material is deposited in ice cores, but the concentration of glacial sulfate does not distinguish between tropospheric and stratospheric erupt...

This study investigates the efficiency of pollution permit markets by conducting an empirical study of the U.S. SO2 market. A hedonic model of coal price is estimated by using the coal price data from 1985 to 1998. The estimation results showed that the sulfur premium was in the same order as the SO2 allowance prices in the EPA auction. In addition, for 1997 and 1998, the SO2 allowance prices w...