Sorption of sulphur dioxide by paper

Edwards, C.J.C; Hudson, F. Lyth; Hockey, J. A.

doi:10.1002/jctb.5010180506

Cited by 21 publications

(6 citation statements)

References 4 publications

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“…Likewise, Grøntoft and Raychaudhuri 179 report increases in the SO 2 uptake rate by factors of 6.5 and 2.2, respectively, comparing 30% RH to 90% RH conditions for "surface treated wood work and wall boards" (0.012 vs 0.078 cm/s) and "wool carpet" (0.043 vs 0.094 cm/s). On the other hand, Edwards et al 170 found that SO 2 uptake by paper did not vary with humidity. As Wilson 169 demonstrated through applying a basic coating to walls, Walsh et al 178 also found that surface pH properties could affect SO 2 uptake rates, reporting that "deposition velocities … were lower for carpets with an acid pH.…”

Section: Sulfur Dioxidementioning

confidence: 94%

“…It seems likely that the irreversible component of uptake reflects either oxidation from S(IV) to S(VI), or the chemical binding of S(IV) to molecules in the surface materials. Supporting the importance of the oxidation pathway are these quotes: “Sulfur dioxide is sorbed by paper and slowly converted to sulphuric acid.” 170 “The sorbed SO 2 is undoubtedly converted to a large extent to sulphite and thence oxidised to sulphate.” 173 “The sorbed sulphur dioxide is oxidised to sulphur trioxide which reacts with water in the leather to produce sulphuric acid.” 174 “The conversion of S(IV)→S(VI) on both iron and zinc was found to have a half‐life of ~ 24 hours.” 177 …”

Section: Acids and Basesmentioning

confidence: 99%

“…Evidence in some empirical studies supports that assumption explicitly 169 . On the other hand, Edwards et al 170 reported that the rate was “proportional to the square root of the gas phase sulphur dioxide concentration.” A square‐root dependence might be expected if the rate‐limiting step was governed by the abundance of HSO 3 − in an aqueous surface film. The aqueous concentration of bisulfite in a solution whose pH is governed by dissolution of gaseous SO 2 increases in proportion to the square root of the gas‐phase SO 2 concentration.…”

Section: Acids and Basesmentioning

confidence: 99%

“…Although not the subject of many systematic recent investigations, studies of SO 2 interactions with indoor surface materials were widely undertaken in the 1960s and 1970s. [169][170][171][172][173][174][175][176][177][178] One exception to the historical pattern is the more recent work by Grøntoft and Raychaudhuri, 179 who assessed the humidity dependence of SO 2 uptake on a variety of indoor surface materials.…”

Section: Sulfur Dioxidementioning

confidence: 99%

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Indoor acids and bases

2020

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Numerous acids and bases influence indoor air quality. The most abundant of these species are CO2 (acidic) and NH3 (basic), both emitted by building occupants. Other prominent inorganic acids are HNO3, HONO, SO2, H2SO4, HCl, and HOCl. Prominent organic acids include formic, acetic, and lactic; nicotine is a noteworthy organic base. Sources of N‐, S‐, and Cl‐containing acids can include ventilation from outdoors, indoor combustion, consumer product use, and chemical reactions. Organic acids are commonly more abundant indoors than outdoors, with indoor sources including occupants, wood, and cooking. Beyond NH3 and nicotine, other noteworthy bases include inorganic and organic amines. Acids and bases partition indoors among the gas‐phase, airborne particles, bulk water, and surfaces; relevant thermodynamic parameters governing the partitioning are the acid‐dissociation constant (Ka), Henry's law constant (KH), and the octanol‐air partition coefficient (Koa). Condensed‐phase water strongly influences the fate of indoor acids and bases and is also a medium for chemical interactions. Indoor surfaces can be large reservoirs of acids and bases. This extensive review of the state of knowledge establishes a foundation for future inquiry to better understand how acids and bases influence the suitability of indoor environments for occupants, cultural artifacts, and sensitive equipment.

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Section: Sulfur Dioxidementioning

confidence: 94%

Section: Acids and Basesmentioning

confidence: 99%

Section: Acids and Basesmentioning

confidence: 99%

Section: Sulfur Dioxidementioning

confidence: 99%

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Indoor acids and bases

2020

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“…Literature data is available on the migration of SO 2 through stacks of papers or books [74]. The effect of paper additives such as rosin [75], metals and pigments [76,77] and calcium carbonate [77] on the migration or sorption of SO 2 has also been studied. However, the migration rate of carboxylic acids, peroxides and nitrogen oxides remains unknown.…”

Section: Migration Of Volatile Compounds Through Paper Stacksmentioning

confidence: 99%

The impact of volatile compounds released by paper on cellulose degradation in ambient hygrothermal conditions

Tétreault¹,

Dupont²,

Bégin³

et al. 2013

Polymer Degradation and Stability

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International audienceThe reactivity towards cellulose of various volatile compounds commonly released by paper was studied. Sheets of Whatman No. 1 (W1) and No. 40 (W40) were exposed to various concentrations of these compounds in vapour phase ranging from 20 to 80 ppm in closed vessels for 52 days in controlled ambient conditions, after which they were hygrothermally aged. The measured properties of the paper were copper number, degree of polymerization, zero-span breaking length, pH and yellowness index. The results showed that hydrogen peroxide was the most aggressive among the volatile compounds tested as it severely degraded W1 cellulose. The exposure of W1 to formic acid led to significant degradation, designating this volatile organic compound (VOC) as the most reactive toward cellulose among the carboxyl and carbonyl functionalized VOCs tested. On the other hand, acetic acid was found comparatively less reactive. Nitrogen oxides, which were produced up to 3 ppm from a side-reaction of the carboxylic acids with the magnesium nitrate used to control the relative humidity in the closed vessels, appeared to contribute significantly to the degradation despite their low concentration. Antagonistic effects were evidenced in binary vapour mixtures where the presence of aldehydes (formalde-hyde and acetaldehyde) counteracted substantially the degradation induced by the most reactive compounds. It was also shown that acetaldehyde, hexanal and furfural in individual exposures had little to no reactivity. Upon exposure to formaldehyde, the rate of glycosidic bond cleavage of cellulose induced by the ageing of W1 was significantly reduced

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Sorption of sulphur dioxide by indoor surfaces I. Wallpapers

Spedding

Rowlands

1970

J. Appl. Chem.

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The sorption of sulphur dioxide by PVC wallcoverings and conventional wallpaper samples has been measured at a maximum sulphur dioxide concentration of 150 μg/m3 by use of 35SO2. The sorption was found to be influenced by the surface finish and design pattern of the wallpapers. Sweat deposits on the samples also influenced the pattern of uptake. The conventional wallpapers showed a greater uptake than did PVC wallcoverings in all cases.

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Sorption of sulphur dioxide by paper

Cited by 21 publications

References 4 publications

Indoor acids and bases

Indoor acids and bases

The impact of volatile compounds released by paper on cellulose degradation in ambient hygrothermal conditions

Sorption of sulphur dioxide by indoor surfaces I. Wallpapers

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