DOI: 10.1016/j.atmosenv.2016.11.069
Scopus记录号: 2-s2.0-85006048252
论文题名: Chemical reaction rates of ozone in water infusions of wheat, beech, oak and pine leaves of different ages
作者: Potier E ; , Loubet B ; , Durand B ; , Flura D ; , Bourdat-Deschamps M ; , Ciuraru R ; , Ogée J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 151 起始页码: 176
结束页码: 187
语种: 英语
英文关键词: Ascorbate
; Cuticle
; Ozone deposition
; Senescence
; Water film
Scopus关键词: Chemical reactions
; Deposition
; Effluents
; Inorganic compounds
; Ozone
; Ozone layer
; Plants (botany)
; Rain
; Ascorbate
; Cuticle
; Developmental stage
; First order chemical reactions
; Laboratory experiments
; Organic materials
; Senescence
; Water film
; Reaction rates
; ascorbic acid
; ozone
; rain
; volatile organic compound
; water
; age
; atmospheric deposition
; biochemical composition
; chemical reaction
; coniferous tree
; deciduous forest
; developmental stage
; experimental study
; film
; laboratory method
; leaf
; model validation
; organic compound
; ozone
; reaction rate
; throughfall
; water vapor
; wheat
; airflow
; Article
; beech
; chemical reaction
; diffusion
; infusion
; oak
; ozonolysis
; pine
; plant leaf
; priority journal
; reaction analysis
; room temperature
; temperature sensitivity
; water vapor
; wheat
; Fagus
; Triticum aestivum
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: In this study we present results from a laboratory experiment designed to evaluate the first-order chemical reaction rate (k) of ozone in water films on plant leaves occurring during dew or rain events. Ozone deposition to wet cuticles is indeed known to be a significant pathway of ozone deposition, but the underlying processes are not yet well understood. Leaf infusions obtained by infusing plant leaves with water at room temperature were introduced into a wet effluent denuder fed with a flux of ozone-rich air. Ozone, water vapour concentrations and temperature were measured in both inlet and outlet airflows in order to compute ozone reaction rates kr using an ozone reaction-diffusion model in the water film. Ascorbate solutions were used to validate the set up and led to kr = 3.6 107 M−1 s−1 consistent with the literature. Ozone reaction rates were determined for wheat, beech, oak and pine leaves infusions at several developmental stages, as well as for rain samples. Leaf infusions reaction rates were between 240 s−1 and 3.4 105 s−1 depending on species and developmental stage, while k for rain water ranged from 130 to 830 s−1. Wheat leaves solutions showed significantly (P < 0.001) higher kr (median 73800 s−1) compared to the other tree species (median 4560 s−1). Senescing or dead leaves also showed significantly (P < 0.001) larger k (median 21100 s−1) compared to non-senescent leaves (median 3200 s−1). In wheat, k also increased with increasing yellow leaf fraction. Our results are in the range of previously reported ozone deposition on wet leaves in field or chamber studies. Composition of leaves infusions and previous studies on throughfall and dew composition shows that reaction of ozone with inorganic compounds may only explain the smallest measured k. The largest k observed during senescent are most likely due to reaction with organic material. This is confirmed by LC-MS measurements which showed detection of ascorbate and VOCs as well as the reaction products of ozone with these compounds. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82240
Appears in Collections: 气候变化事实与影响
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作者单位: UMR ECOSYS, INRA, AgroParisTech, Université Paris -Saclay, Thiverval-Grignon, France; INRA, UMR INRA-BordeauxSciencesAgro, 1391 ISPA, Villenave d'Ornon, France
Recommended Citation:
Potier E,, Loubet B,, Durand B,et al. Chemical reaction rates of ozone in water infusions of wheat, beech, oak and pine leaves of different ages[J]. Atmospheric Environment,2017-01-01,151