Comparison of Langmuir sorption parameters of sterile soils with corresponding non-sterile soils.

<p>Results are shown as mean (standard error).</p><p><i>Q_max</i> and <i>k</i> values followed by different letters in parenthesis between non-sterile and sterile soils within a compound and soil order is statistically significant at <i>P≤</i>0.05. Only one soil type per order is compared, so the <i>Q_max</i> and <i>k</i> of non-sterile soils do not match with that in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050434#pone-0050434-t002" target="_blank">Table 2</a>.</p><p>NA = Not determined.