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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Debera A. Backhus</dc:contributor>
  <dc:contributor>Paul D. Capel</dc:contributor>
  <dc:contributor>Steven J. Eisenreich</dc:contributor>
  <dc:creator>Joseph J. Piatt</dc:creator>
  <dc:date>1996</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Sorption experiments were conducted with naphthalene, phenanthrene, and pyrene on low organic carbon sediments at 4 and 26 °C using batch and column techniques. Experimental controls ensured the absence of biologic and photolytic activity and colloid-free solution supernatants. Equilibrium distribution coefficients (&lt;/span&gt;&lt;i&gt;K&lt;/i&gt;&lt;sub&gt;d&lt;/sub&gt;&lt;span&gt;) increased 1.1−1.6 times with a decrease in temperature of 22 °C. Fraction instantaneous sorption (&lt;/span&gt;&lt;i&gt;F&lt;/i&gt;&lt;span&gt;) values did not change significantly with a decrease in temperature of 22 °C. Desorption rate constants (&lt;/span&gt;&lt;i&gt;k&lt;/i&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;) decreased 1.2−2.6 times with a decrease in temperature of 22 °C. Times to equilibrium were at least 40 h. The magnitude of observed&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;i&gt;K&lt;/i&gt;&lt;sub&gt;d&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;and&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;i&gt;k&lt;/i&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;values and the effect of temperature on&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;i&gt;K&lt;/i&gt;&lt;sub&gt;d&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;(e.g., low enthalpy of sorption) are consistent with sorbate partitioning between the aqueous phase and small amounts of organic matter (&lt;/span&gt;&lt;i&gt;f&lt;/i&gt;&lt;sub&gt;oc&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;= 0.02%) on the sediments. The temperature dependence of&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;i&gt;K&lt;/i&gt;&lt;sub&gt;d&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;and&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;i&gt;k&lt;/i&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;may be small as compared to the effects of heterogeneities in field-scale aquifer systems. Thus, thermal gradients may not be of major importance in most saturated subsurface regimes when predicting solute transport. However, aquifer remediation pump-and-treat times could be decreased because increased temperature decreases both retardation and tailing.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1021/es9406288</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>ACS Publications</dc:publisher>
  <dc:title>Temperature-dependent sorption of naphthalene, phenanthrene, and pyrene to low organic carbon aquifer sediments</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>