Interactions between SO2 and carbonaceous particulates

Tartarelli, R.; Davini, Paolo; Morelli, F.; Corsi, Pietro

doi:10.1016/0004-6981(78)90209-3

Cited by 45 publications

(2 citation statements)

References 6 publications

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“…In addition to directly forming sulfate, these reactions of SO 2 with carbonaceous particles can convert hydrophobic particle surfaces into hydrophilic surfaces. A variety of mechanisms for SO 2 oxidation reactions on carbonaceous surfaces have been proposed, involving a variety of oxidizing species [ Novakov et al , 1974; Liberti et al , 1978; Tartarelli et al , 1978; Britton and Clarke , 1980; Baldwin , 1982]. In this work, our focus will not be on evaluating mechanisms, but rather demonstrating that rates of heterogeneous reactions can be sufficiently high to explain the observed sulfate enhancements during the wood smoke episode.…”

Section: Resultsmentioning

confidence: 99%

Secondary particle formation and evidence of heterogeneous chemistry during a wood smoke episode in Texas

et al. 2006

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[1] To evaluate the impact of regional wildfires in east Texas on fine particulate matter concentration and composition, source apportionment calculations were performed on a set of samples collected at three sites in Houston during a wood smoke episode. Separately, samples collected at the same sites on days not influenced by wood smoke, were analyzed for comparison. The analysis of the data collected on non-wood smoke episode days indicated that the major contributors to PM 2.5 mass were secondary sulfate, diesel and gasoline powered vehicles, other organics (difference between the measured organic mass by carbon (OMC) and the sum of the primary OC source contributions), wood combustion and meat cooking. Secondary sulfate (not apportioned to a primary source) represented almost 100% of the sulfate measured whereas primary sources were found to account for the majority of the measured organic carbon at three sites (64-69%). On the wood smoke episode days, major sources of PM 2.5 were found to be the same as on the days without wood smoke, except for the contribution of the meat cooking source, which became insignificant on the wood smoke episode days. The contribution of the wood combustion source increased by an average of 200% at all sites on wood smoke episode days, whereas the contributions of other primary sources did not increase significantly during the wood smoke episode. PM 2.5 mass almost doubled during the wood smoke episode, largely because of the contributions of the secondary sources. The mass concentrations of secondary sulfate and organics not attributed to primary sources increased 68% and 228% at each site, respectively, during the wood smoke episode. The increase in the contributions of secondary sulfate aerosols during the wood smoke episode was examined using a 3-D photochemical grid model. The simulations, together with ambient data, indicated that the increases in sulfate concentrations observed during this wood smoke episode were consistent with heterogeneous/surface reactions on wood smoke particles.

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Section: Resultsmentioning

confidence: 99%

Secondary particle formation and evidence of heterogeneous chemistry during a wood smoke episode in Texas

et al. 2006

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“…The chemical fundamentals of the effects of pollutants on stone have been known since the 1960s [22,23]. Moreover, several studies have assessed the ability of the stone to absorb SO 2 [24], and it has even been speculated that this process could have a significant effect in cleaning the surrounding air [25].…”

Section: Structure and Main Componentsmentioning

confidence: 99%

The Impact of Air Pollution on Stone Materials

et al. 2023

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Air pollution can have a significant impact on stone materials used in monuments, buildings, and sculptures. Sulfur and nitrogen oxides are particularly harmful pollutants, especially in carbonate stones. These oxides, reacting with moisture in the air, result in the formation of acids able to erode the stone surface and gradually compromise its structural integrity. The acids can also combine with airborne particulate matter, heavy metals, and salts, leading to the development of black crusts. These not only have detrimental effects on the stone’s integrity but also affect the original appearance of the surfaces, threatening the conservation of important monuments and buildings. This review discusses the characteristics of black crusts and their relation to the environment and stone materials.

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Heterogeneous reactions of sulfur dioxide with carbonaceous particles

Baldwin

1982

Int J of Chemical Kinetics

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The rate of adsorption of SO2 on a prototype carbonaceous surface was measured a t low pressure in a flow reactor. The measured rate indicates a maximum atmospheric loss of SO2 hy heterogeneous reaction of l%/h for a particle density of 100 pglm". The capacity of carbon particles to adsorb SO2 is limited a t -1 rng SO? g-' C. NO:, has no effect on the rate of SO? adsorption or the saturation behavior.

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Interactions between SO2 and carbonaceous particulates

Cited by 45 publications

References 6 publications

Secondary particle formation and evidence of heterogeneous chemistry during a wood smoke episode in Texas

Secondary particle formation and evidence of heterogeneous chemistry during a wood smoke episode in Texas

The Impact of Air Pollution on Stone Materials

Heterogeneous reactions of sulfur dioxide with carbonaceous particles

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