Uptake of Aldehydes and Ketones at Typical Indoor Concentrations by Houseplants
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- 作者：Akira Tani ; C. Nicholas Hewitt
- 刊名：Environmental Science & Technology
- 出版年：2009
- 出版时间：November 1, 2009
- 年：2009
- 卷：43
- 期：21
- 页码：8338-8343
- 全文大小：287K
- 年卷期：v.43,no.21(November 1, 2009)
- ISSN：1520-5851
文摘
The uptake rates of low-molecular weight aldehydes and ketones by peace lily (Spathiphyllum clevelandii) and golden pothos (Epipremnum aureum) leaves at typical indoor ambient concentrations (101−102 ppbv) were determined. The C3−C6 aldehydes and C4−C6 ketones were taken up by the plant leaves, but the C3 ketone acetone was not. The uptake rate normalized to the ambient concentration Ca ranged from 7 to 19 mmol m−2 s−1 and from 2 to 7 mmol m−2 s−1 for the aldehydes and ketones, respectively. Longer-term fumigation results revealed that the total uptake amounts were 30−100 times as much as the amounts dissolved in the leaf, suggesting that volatile organic carbons are metabolized in the leaf and/or translocated through the petiole. The ratio of the intercellular concentration to the external (ambient) concentration (Ci/Ca) was significantly lower for most aldehydes than for most ketones. In particular, a linear unsaturated aldehyde, crotonaldehyde, had a Ci/Ca ratio of 0, probably because of its highest solubility in water.