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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2001jou428.pdf
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| Publication Type:
| Refereed |
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| Author(s): | Roy, J. L.;
McGill, W. B. |
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| Author Affiliation: | Roy: Imperial Oil Limited, Oil Sands Development and Research, Calgary, AB, Canada; McGill: College of Science and Management, University of Northern British Columbia, Prince George, BC, Canada |
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| Title: | Observations on the chemistry of organic materials in water-repellent soils |
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| Section: | Soil biology and chemistry
Other records with the "Soil biology and chemistry" Section
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| Meeting Info.: | Toronto, Ontario, Canada: July 2001 |
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| Source: | International Turfgrass Society Research Journal. Vol. 9, No. Part 1, 2001, p. 428-436. |
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| Publishing Information: | Oakville, Ontario, Canada: International Turfgrass Society |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Polar molecules; Water repellency; Organic matter; Hydrophobic soils; Chemistry; Petroleum; Contamination; Hydrogen ion; Hydrogen; Soil pH; Hydrogen isotope ratio; Chemical properties of soil; Physical properties of soil; Ratios
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| Abstract/Contents: | "Some soils develop severe and persistent water repellency several years or decades following petroleum contamination. The present paper describes knowledge gained to date regarding what may cause the condition in three pertoleum-contaminated soils and soils that were never exposed to petroleum contamination. Data from Roy and McGill [1998], Roy et al. [1999], Roy and McGill [2000a, 2000b] are collated and analyzed to highlight consistency of the evidence obtained. A coherent conceptual model is formulated to explain how this new evidence may fit together with earlier findings. Change in soil water repellency symptoms following exposure to fluids of varying polarity, H-bonding capacity and amphiphilic character is the principal tool used to study solvent-induced reversible soil water repellency. The proposed model attributes solvent-induced reversible water repellency to solvent-induced changes in the conformation of causative agents of soil water repellency. The causative agents are postulated to be conformationally flexible, nonpolar alkyl chain substituents whose chain conformation and packing density at the solid/fluid interface determine the severity of water repellency symptoms displayed by soil. The model postulates that, in polar, H-bonding fluid, exposed alkyl chain substituents coil spontaneously to minimize their fractional coverage of the solid/fluid interface in soil. Conversely in weakly polar, non-H-bonding fluid, they tend to stretch to maximize their fractional coverage of the solid/fluid interface in soil. Finally, a universal principle is hypothesized that relates the occurrence and severity of soil water repellency symptoms to a quantifiable physicochemical characteristic of the soil; that is, the ratio of hydrophobic-to-hydrophilic surface area to volume in soil." |
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| Language: | English |
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| References: | 43 |
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| Note: | Figures
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roy, J. L., and W. B. McGill. 2001. Observations on the chemistry of organic materials in water-repellent soils. Int. Turfgrass Soc. Res. J. 9(Part 1):p. 428-436. |
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| Web URL(s):
https://archive.lib.msu.edu/tic/its/articles/2001jou428.pdf
Last checked: 04/09/2009
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MSU catalog number: SB 433 .I52 v. 9 |
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