This paper is an attempt to measure our understanding of volcano/atmosphere interactions by comparing a box model of potential volcanogenic aerosol production and removal in the stratosphere with the stratospheric aerosol optical depth over the period of 1979 to 1994. Model results and observed data are in good agreement both in magnitude and removal rates for the two largest eruptions, El Chic...

The DNA-damaging effects of sulfur dioxide (SO2) derivatives (a mixture of sodium sulfite and sodium bisulfite, 3:1 M/M) in the cells of various organs (brain, lung, heart, liver, stomach, spleen, thymus, bone marrow and kidney) of male mice were studied using the single cell gel electrophoresis technique (SCGE). Three groups of six mice each received an i.p. dose of SO2 derivatives (125, 250 o...

The hypothesis that chronic stimulation of C-fibres by inhaled irritants contributes to the inflammatory changes that occur during the development of chronic bronchitis was tested. The effect of neonatal capsaicin pretreatment on the development of respiratory tract inflammation was examined in a rat model of chronic bronchitis induced by SO2 exposure. Adult capsaicin- and vehicle-treated rats ...

BACKGROUND Mount Oyama, on the Japanese island of Miyakejima, began erupting in June 2000, necessitating the evacuation of 3,000 island residents. Volcanic gas emissions, primarily consisting of sulfur dioxide (SO2), gradually decreased and residents returned to the island after the evacuation order was lifted in February 2005. OBJECTIVES To assess the exposure-effect and exposure-response re...

A year-long field study to characterize the ionic species in PM2.5 was carried out in Shanghai and Beijing, China, in 1999–2000. Weekly samples of PM2.5 were collected using a special low flow rate (0.4 lmin ) sampler. In Shanghai, SO4 2 NO3 and NH4 + were the dominant ionic species, which accounted for 46%, 18% and 17% of the total mass of ions, respectively. Local SO2 emissions were an import...

[1] High-resolution, ultraviolet SO2 photoabsorption cross section data are required for modeling density and temperature profiles of SO2 in solar system atmospheres. We report measurements of such cross sections on SO2 at 295 K for the ~ B B1 ~ X A1 and ~ CB2 ~ X A1 bands over the wavelength range 220 to 325 nm. Resolving powers of up to 550,000 were employed in order to study the congested sp...

This study presents a review on advanced oxidation processes (AOP) for simultaneous removal of NO and SO2. AOP is based on using a strong oxidant such as ozone and H2O2 which is able to generate highly reactive intermediates. The pollutant will be oxidized and removed by these intermediates. In recent years, AOP has been considered as an effective and attractive technology in the field of flue ...

The post-synthesis modification is a highly efficient method for the of Metal-organic framework (MOF) materials, which has been used to synthesize MOF materials purposefully that cannot be prepared by direct synthesis and impregnation method. In this work, amino modified ZIF8 with 5-aminotetrazole was post employed reversibly remove SO2 from flue gas. Based on characterization analysis X-ray di...

The performance and longevity of fuel cells can be significantly degraded by the contaminants in air, such as SO2 NO2, which poison cathode catalysts. cleanup air a real environment may thus required. In this work, sorption desorption behavior over molecular basket sorbents (MBSs) consisting polyethylenimine (PEI) SBA-15 has been studied. effects temperature, PEI loading concentration on capaci...