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Sorption and Desorption of Naphthalene by Soil Organic Matter

Importance of Aromatic and Aliphatic Components

Amrith S. Gunasekara and Baoshan Xing*

Department of Plant and Soil Sciences, Univ. of Massachusetts, Stockbridge Hall, Amherst, MA 01003-7245



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  		Fig. 1. (a) Schematic diagram showing the distribution of crystalline (-{square}-) and amorphous (-{circ}-) aliphatic organic matter. (b) Interaction of the aliphatic components with a clay mineral surface (shaded area) rearranging part of the amorphous domain into a condensed configuration (-{triangleup}-) having nanometer-size holes.

 


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  		Fig. 2. Sorption ({blacksquare}) and desorption ({circ}) isotherms of naphthalene by (a) humic acid (HA), (b) whole soil, and (c) humin.

 


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  		Fig. 3. Distribution of hysteresis index for humic acid (HA) ({circ}), whole soil ({square}), and humin ({triangleup}).

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
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Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2003 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.