Journal article
Soil water repellency: A molecular-level perspective of a global environmental phenomenon
Geoderma, Vol.338, pp.56-66
2019
Abstract
Soil water repellency affects vast regions of agricultural and native land across the globe. Sandy soils are most likely to develop non-wetting characteristics with susceptibility decreasing with clay content. This study uses molecular dynamics simulations combined with laboratory scale experiments to study the interactions and assembly of saturated C16 straight chain alcohol and carboxylic acid molecules on a range of soil surfaces. The development of severe water repellency on sand at low loading levels of palmitic acid (0.75 × 10−6 mol g−1) is explained in terms of favourable H-bonding with silica surfaces and the development of 2–3 layers of lateral aligned organic molecules on the mineral surface. The efficacy of kaolinite in lowering soil water repellency is attributed to the higher surface area of this mineral and favourable surface chemistry, which hinders formation of persistent organic multilayers.
Details
- Title
- Soil water repellency: A molecular-level perspective of a global environmental phenomenon
- Authors/Creators
- N.R.R. Daniel (Author/Creator) - Murdoch UniversityS.M.Mijan Uddin (Author/Creator) - University of ChittagongR.J. Harper (Author/Creator) - Murdoch UniversityD.J. Henry (Author/Creator) - Murdoch University
- Publication Details
- Geoderma, Vol.338, pp.56-66
- Publisher
- Elsevier BV
- Identifiers
- 991005542948607891
- Copyright
- © 2018 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology; School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.879 Soil Erosion
- Web Of Science research areas
- Soil Science
- ESI research areas
- Agricultural Sciences