Statistical Implications of Pyrene and Phenanthrene Sorptive Phenomena: Effects of Sorbent and Solute Properties |
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Authors: | S Hwang T J Cutright |
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Institution: | (1) Department of Civil Engineering, University of Akron, Akron Ohio 44325-3905, USA, US |
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Abstract: | A 3 × 2 factorial experiment in a generalized randomly complete block was conducted to assess the effects of soil type, soil
preparation, and solute concentration on the sorptive behavior of pyrene (PYR) and phenanthrene (PHE). Three bulk soils were
treated to remove the soil organic matter (SOM) or clay fractions, then spiked with an initial PYR/PHE concentration of either
3 or 15 mg/L. On average, 98.3% PYR and 91.3% PHE were sorbed to the bulk soils in 24 h, with 4.96 mg PYR kg−1 soil and 22.48 mg PHE kg−1 soil desorbed after three successive 24-h desorption steps. Both clay minerals and SOM greatly contributed to the sorptive
behavior. For example, an average 95.1% and 96.1% of the initial PYR sorbed to the clay-removed and SOM-removed subsoils,
respectively. Conversely, 16.5 mg/kg and 12.9 mg/kg of the sorbed PYR was desorbed from the clay-removed and SOM-removed subsoils,
respectively.
Received: 18 January 2002/Accepted: 13 May 2002 |
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