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Published online 27 October 2006
Published in J Environ Qual 35:2154-2161 (2006)
DOI: 10.2134/jeq2006.0013
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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The Role of Lipids on Sorption Characteristics of Freshwater- and Wastewater-Irrigated Soils

Yaron Droria, Buuan Lamc, Andre Simpsonc, Zeev Aizenshtatb and Benny Chefetza,*

a Department of Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
b Casali Institute of Applied Chemistry and The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
c Department of Physical and Environmental Science, The University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario, MIC 1A4 Canada


Figure 1
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  		Fig. 1. 1H NMR and diffusion-edited 1H NMR spectra of the lipid extracts from wastewater- and freshwater-irrigated soils. The peaks in both spectra were assigned to benzene (1), water (2), methanol (3), tetramethylsilane (4; internal standard), aromatic and conjugated double-bond signals (5), nonconjugated double bonds (6), protons adjacent to oxygenated structures, sugars and esters, hydroxyls, ethers (7), units ß to the carbonyl in an acid or ester or ß to the double bond in an unsaturated chain (8), units {gamma} to an oxygen-containing linkage or double bond and methines in branched aliphatic chains (9), main-chain methylene in aliphatic chains (10), methyl protons (11), protons adjacent to oxygen in esters (12) and to ether or hydroxyls (13).

 

Figure 2
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  		Fig. 2. Gas chromatograph/mass spectrometer (GC/MS) total ion current chromatogram of the extracted lipids (hexane fraction) from (a) freshwater-irrigated soil and (b) wastewater-irrigated soil.

 

Figure 3
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  		Fig. 3. Sorption isotherms of atrazine, chlorotoluron, and phenanthrene to untreated soils (open symbols) and extracted soils (filled symbols). Each point represents the mean of triplicate vials and the error bar is the range.

 




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