DOI: 10.1007/s10533-017-0352-7
Scopus记录号: 2-s2.0-85021150959
论文题名: Why do biogenic volatile organic compounds (BVOCs) derived from vegetation fire not induce soil water repellency?
作者: Uddin S.M.M. ; Daniel N.R.R. ; Harper R.J. ; Henry D.J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 134, 期: 2018-01-02 起始页码: 147
结束页码: 161
语种: 英语
英文关键词: BVOCs
; MED
; Molecular dynamics
; Vegetation fire
; Water repellency
Scopus关键词: chemical compound
; experimental study
; hydrophobicity
; molecular analysis
; smoke
; soil water
; volatile organic compound
; wildfire
; Australia
英文摘要: Biogenic volatile organic compounds (BVOCs) are continually emitted from plants and are also a component of smoke during vegetation fire. Although vegetation fire events have been shown to have implications for the dynamics of soil water repellency (SWR) and there have been anecdotal reports that forest smoke can induce water repellency, the role of BVOCs in this process has not been explored. Accordingly, we investigated a selection of major BVOCs (cis-3-hexen-1-ol; levoglucosenone; 2-methyl-3-buten-2-ol; cineole; α-phellandrene; α-terpinene) that are emitted from the dominant native vegetation of Australia during fire. The potential of each compound to induce SWR was investigated by applying different loadings on acid washed sand (AWS) (300–350 µm diameter) and then assessing water repellency with the molarity of ethanol drop test. A long-chain amphiphilic molecule (palmitic acid) was also applied to AWS for comparison. Although palmitic acid was effective at inducing water repellency, the BVOCs were not, even at high loadings (5 × 10−4 mol g−1). Fully atomistic molecular dynamics simulations complemented the experimental measurements. These studies suggested that poor expression of water repellency by the BVOCs could be explained by their tendency to exhibit weak interactions towards the quartz surface but strong molecule–molecule attractions. In comparison, the long-chain amphiphilic molecules exhibited a balance between molecule–molecule and molecule–surface interactions that favored surface adhesion, which in turn led to the formation of a hydrophobic layer. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83265
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Veterinary and Life Sciences, Murdoch University, 90 South Street, Perth, WA, Australia; School of Engineering and Information Technology, Murdoch University, 90 South Street, Perth, WA, Australia
Recommended Citation:
Uddin S.M.M.,Daniel N.R.R.,Harper R.J.,et al. Why do biogenic volatile organic compounds (BVOCs) derived from vegetation fire not induce soil water repellency?[J]. Biogeochemistry,2017-01-01,134(2018-01-02)