Secondary pollutants from ozone reactions with ventilation filters and degradation of filter media additives

Destaillats, Hugo; Chen, Wenhao; Apte, Michael G.; Li, Nuan; Spears, Michael; Almosni, Jérémie; Brunner, Gregory; Zhang, Jianshun Jensen; Fisk, William J.

doi:10.1016/j.atmosenv.2011.03.066

Cited by 27 publications

(23 citation statements)

References 22 publications

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“…Previous studies carried out at high temperatures have shown that manganese oxide catalyst inactivation can occur due to the deposition of elemental carbon and sulfur resulting from the oxidation reaction of organics on the surface [36]. Similarly, dust particles deposited on the filter may partially block the catalyst surface and increase its moisture content, becoming a source of secondary pollutants and affecting catalyst performance [37]. The reduction of the surface Mn(III) ions to Mn(II) leading to oxygen depletion coupled with loss of some surface species such as sodium can also decrease catalytic activity [38].…”

Section: Effect Of the Relative Humiditymentioning

confidence: 99%

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Sidheswaran

Destaillats

Sullivan

et al. 2011

Applied Catalysis B: Environmental

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Manganese oxide-based catalysts have been synthesized and tested for the abatement of formaldehyde, an ubiquitous indoor pollutant which is not effectively eliminated by most air cleaning technologies. Catalysts were prepared by co-precipitation of MnSO 4 and NaMnO 4 followed by curing at 100, 200 and 400 0 C. Characterization was performed using X-ray diffractometry (XRD), porosimetry, scanning electron microscopy (SEM), and inductively coupled plasma -mass spectrometry (ICP-MS). Diffractograms Research Highlights:). Due to the relatively low costs of synthesis and deployment of these catalysts, this technology is promising for maintaining low indoor formaldehyde levels, enabling energy-saving reductions of building ventilation rates.Synthesis of manganese oxide-based catalysts to remove indoor formaldehyde; High surface area and porosity; Small crystal size; Complete mineralization of formaldehyde;High activity maintained after processing up to 400 m 3 of formaldehyde-laden air.

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Section: Effect Of the Relative Humiditymentioning

confidence: 99%

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Sidheswaran

Destaillats

Sullivan

et al. 2011

Applied Catalysis B: Environmental

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“…The main sources of indoor formaldehyde include the degradation of additives used in wood-based building materials, furniture, and sealants as well as combustion and chemical reactions common to the indoor environment (Destaillats et al, , 2011Hodgson et al, 2002;Sidheswaran et al, 2013;Singer et al, 2006). Potential health concerns include irritation to the eyes, nose, throat, and lungs.…”

Section: Introductionmentioning

confidence: 99%

The effects of an energy efficiency retrofit on indoor air quality

et al. 2014

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To investigate the impacts of an energy efficiency retrofit, indoor air quality and resident health were evaluated at a low-income senior housing apartment complex in Phoenix, Arizona, before and after a green energy building renovation. Indoor and outdoor air quality sampling was carried out simultaneously with a questionnaire to characterize personal habits and general health of residents. Measured indoor formaldehyde levels before the building retrofit routinely exceeded reference exposure limits, but in the long-term follow-up sampling, indoor formaldehyde decreased for the entire study population by a statistically significant margin. Indoor PM levels were dominated by fine particles and showed a statistically significant decrease in the long-term follow-up sampling within certain resident subpopulations (i.e. residents who report smoking and residents who had lived longer at the apartment complex). Practical ImplicationsThe results presented here provide insight into the indoor air quality before, immediately after, and 1 year after an energy efficiency retrofit on a federal-subsidized senior apartment complex. With increasing focus on building energy efficiency, it is critical to evaluate possible relationships between resident health and changes in indoor environmental quality. Initially, formaldehyde exposure was quite high for all study participants, but an overall decrease was measured a year after the construction was completed. Particulate matter, however, was largely impacted by resident behavior (such as smoking), and a long-term decrease was only observed when combined with particular subpopulations.

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“…Destaillats et al (2011) Ozone reactions with organic compounds sorbed on activated carbon (AC) filters produced 4-acetyl-1-methylcyclohexene (AMCH), limonene oxides, and straight-chain aldehydes.…”

Section: Key Findings Referencesmentioning

confidence: 99%

Ozone in indoor environments: Research progress in the past 15 years

Fadeyi

2015

Sustainable Cities and Society

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Secondary pollutants from ozone reactions with ventilation filters and degradation of filter media additives

Cited by 27 publications

References 22 publications

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

The effects of an energy efficiency retrofit on indoor air quality

Ozone in indoor environments: Research progress in the past 15 years

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