Untersuchungen zur immissions‐ und geruchsreduzierenden Eigenschaft von zeolithehaltigen Gipsbaustoffen

Hummel, H.-U.; Krämer, Georg; Scherer, Christian; Mair, Stefan; Breuer, Klaus; Sedlbauer, Klaus

doi:10.1002/bapi.200710055

Cited by 2 publications

(1 citation statement)

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“…The most effective reductions in concentrations were of compounds containing hydroxyl or carbonyl groups. Human olfactory measurements also revealed a decrease in unpleasant odors [36]. Porous silica spheres were found to have a higher efficiency toward carbonyl adsorption compared to XAD-4 resins in an indoor environment [37].…”

Section: Introductionmentioning

confidence: 95%

Catalyzed Reactions on Mineral Plaster Materials Used for Indoor Air Purification

Gunschera¹,

Markewitz²,

Koberski³

et al. 2013

CLEAN Soil Air Water

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Zeolites have been used for a long time for purification and catalytical purposes. Recently, first products appeared on the market using zeolites also for improving the indoor air quality so far volatile organic compounds (VOC) are concerned. However, porous compounds like zeolites can be found also in plaster material. Therefore, it was manifest to evaluate the capability of plaster with regard to air cleaning. In this article, the contribution of plaster compounds toward adsorption and catalytical decomposition of VOCs is evaluated using a-pinene, chlorobenzene, 2-ethoxyethylacetate, and pentanal as target substances under standard conditions (238C, 50% r.H.). These compounds were chosen because of their VOC typical physicochemical properties like molecular dimensions, density, boiling point, vapor pressure, and octanol-water distribution coefficient (logk ow ). Hydrated lime and metakaolin were found out to have good adsorption properties under these circumstances. Also natural zeolites showed good results especially on pentanal. By investigations in environmental chambers the reduction potential of test plasters on chlorobenzene and 2-ethoxyethylacetate concentrations could be shown. Application of coatings had no or only temporary influence on the performance of the plaster. Additional tests in small chambers demonstrated the possibility to improve the properties of plasters with help of FAU-or MFI-type zeolites but the experiments also showed that a-pinene and pentanal undergo chemical reactions. Further effort should be made on investigations also toward other compounds, especially more volatile ones like formaldehyde. Also additional building materials like insulation material or boards should be taken into account.

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Section: Introductionmentioning

confidence: 95%