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A mechanistic study of limonene oxidation products and pathways following cleaning activities

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A mechanistic study of limonene oxidation products and pathways following cleaning activities. / Carslaw, Nicola.

In: Atmospheric Environment, Vol. 80, No. n/a, 12.2013, p. 507-513.

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Harvard

Carslaw, N 2013, 'A mechanistic study of limonene oxidation products and pathways following cleaning activities', Atmospheric Environment, vol. 80, no. n/a, pp. 507-513. https://doi.org/10.1016/j.atmosenv.2013.08.034

APA

Carslaw, N. (2013). A mechanistic study of limonene oxidation products and pathways following cleaning activities. Atmospheric Environment, 80(n/a), 507-513. https://doi.org/10.1016/j.atmosenv.2013.08.034

Vancouver

Carslaw N. A mechanistic study of limonene oxidation products and pathways following cleaning activities. Atmospheric Environment. 2013 Dec;80(n/a):507-513. https://doi.org/10.1016/j.atmosenv.2013.08.034

Author

Carslaw, Nicola. / A mechanistic study of limonene oxidation products and pathways following cleaning activities. In: Atmospheric Environment. 2013 ; Vol. 80, No. n/a. pp. 507-513.

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@article{ad3dd240e1534d57a9330fde5d5bb23e,
title = "A mechanistic study of limonene oxidation products and pathways following cleaning activities",
abstract = "Indoor air pollution has caused increasing concern since the 1970s, when the advent of stricter energy efficiency measures lead to increased reports of building related symptoms. Cleaning activities have been linked to adverse health effects indoors, although it is unclear which of the components of cleaning products cause these reported health effects. This paper uses a detailed chemical model for indoor air chemistry, to identify the species formed at the highest concentrations following use of a limonene-based cleaning product. The explicit nature of the chemical mechanism also permits the key pathways to their formation to be identified. The results show that the key species in terms of gas-phase concentration are multi-functional carbonyl species including limonaldehyde, 4-acetyl-1-methyl-1-cyclohexene and other dicarbonyl species. The particle-phase was dominated by peroxide species. The predicted gas-phase concentrations for three limonene-oxidation products were compared to recently published human reference values, but found not to be high enough to cause concern for typical indoor conditions, or under high indoor ozone conditions. However, cleaning products contain a range of terpenes other than limonene, which could also produce some of the secondary products identified here, as well as more common species such as formaldehyde, glyoxal and hydrogen peroxide. A mechanistic pathway analysis shows that the secondary products formed through limonene oxidation indoors depend critically on the competition between ozone and hydroxyl radicals, such that indoor pollutant concentrations and composition could vary widely in different locations for a nominally similar residence and indoor activities. Future studies should focus on aiming to measure multi-functional carbonyl species indoors to help validate models, whilst human reference values are needed for many more relevant species indoors.",
keywords = "indoor air pollution, limonene, ozone, multi-functional carbonyl groups, cleaning; detailed chemical model",
author = "Nicola Carslaw",
year = "2013",
month = dec,
doi = "10.1016/j.atmosenv.2013.08.034",
language = "English",
volume = "80",
pages = "507--513",
journal = "Atmospheric Environment",
issn = "1352-2310",
publisher = "Elsevier Limited",
number = "n/a",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - A mechanistic study of limonene oxidation products and pathways following cleaning activities

AU - Carslaw, Nicola

PY - 2013/12

Y1 - 2013/12

N2 - Indoor air pollution has caused increasing concern since the 1970s, when the advent of stricter energy efficiency measures lead to increased reports of building related symptoms. Cleaning activities have been linked to adverse health effects indoors, although it is unclear which of the components of cleaning products cause these reported health effects. This paper uses a detailed chemical model for indoor air chemistry, to identify the species formed at the highest concentrations following use of a limonene-based cleaning product. The explicit nature of the chemical mechanism also permits the key pathways to their formation to be identified. The results show that the key species in terms of gas-phase concentration are multi-functional carbonyl species including limonaldehyde, 4-acetyl-1-methyl-1-cyclohexene and other dicarbonyl species. The particle-phase was dominated by peroxide species. The predicted gas-phase concentrations for three limonene-oxidation products were compared to recently published human reference values, but found not to be high enough to cause concern for typical indoor conditions, or under high indoor ozone conditions. However, cleaning products contain a range of terpenes other than limonene, which could also produce some of the secondary products identified here, as well as more common species such as formaldehyde, glyoxal and hydrogen peroxide. A mechanistic pathway analysis shows that the secondary products formed through limonene oxidation indoors depend critically on the competition between ozone and hydroxyl radicals, such that indoor pollutant concentrations and composition could vary widely in different locations for a nominally similar residence and indoor activities. Future studies should focus on aiming to measure multi-functional carbonyl species indoors to help validate models, whilst human reference values are needed for many more relevant species indoors.

AB - Indoor air pollution has caused increasing concern since the 1970s, when the advent of stricter energy efficiency measures lead to increased reports of building related symptoms. Cleaning activities have been linked to adverse health effects indoors, although it is unclear which of the components of cleaning products cause these reported health effects. This paper uses a detailed chemical model for indoor air chemistry, to identify the species formed at the highest concentrations following use of a limonene-based cleaning product. The explicit nature of the chemical mechanism also permits the key pathways to their formation to be identified. The results show that the key species in terms of gas-phase concentration are multi-functional carbonyl species including limonaldehyde, 4-acetyl-1-methyl-1-cyclohexene and other dicarbonyl species. The particle-phase was dominated by peroxide species. The predicted gas-phase concentrations for three limonene-oxidation products were compared to recently published human reference values, but found not to be high enough to cause concern for typical indoor conditions, or under high indoor ozone conditions. However, cleaning products contain a range of terpenes other than limonene, which could also produce some of the secondary products identified here, as well as more common species such as formaldehyde, glyoxal and hydrogen peroxide. A mechanistic pathway analysis shows that the secondary products formed through limonene oxidation indoors depend critically on the competition between ozone and hydroxyl radicals, such that indoor pollutant concentrations and composition could vary widely in different locations for a nominally similar residence and indoor activities. Future studies should focus on aiming to measure multi-functional carbonyl species indoors to help validate models, whilst human reference values are needed for many more relevant species indoors.

KW - indoor air pollution

KW - limonene

KW - ozone

KW - multi-functional carbonyl groups

KW - cleaning; detailed chemical model

U2 - 10.1016/j.atmosenv.2013.08.034

DO - 10.1016/j.atmosenv.2013.08.034

M3 - Article

VL - 80

SP - 507

EP - 513

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

IS - n/a

ER -