Stroud J L, Rhodes A H, Semple K T, Simek Z, Hofman J
RECETOX, Research Centre for Environmental Chemistry and Ecotoxicology, Masaryk University, Kamenice 126/3, Brno CZ62500, Czech Republic.
Environ Pollut. 2008 Dec;156(3):664-70. doi: 10.1016/j.envpol.2008.06.021. Epub 2008 Jul 23.
The aim of this paper was to measure the changing desorbable fraction and bioaccessibility of phenanthrene in two different soils with increasing soil-phenanthrene contact time using supercritical fluid extractions (SFE). Both soils were spiked with 100 mg kg(-1) phenanthrene and aged for 28d. Desorption profiles were measured every 7d using selective SFE conditions and the results were compared to 14C-phenanthrene mineralisation assays. Selective SFE showed significant differences in the rates and extents of desorption in the two soils, likely to be due to different organic matter composition. Post-extraction fitting of data yielded consistent SFE extraction times within ageing soils for bioaccessibility prediction.
本文的目的是使用超临界流体萃取（SFE）方法，测定两种不同土壤中菲的可解吸部分和生物可利用性随土壤 - 菲接触时间增加的变化情况。两种土壤均添加100 mg kg(-1)的菲，并陈化28天。每隔7天使用选择性SFE条件测量解吸曲线，并将结果与14C - 菲矿化试验进行比较。选择性SFE显示出两种土壤在解吸速率和程度上存在显著差异，这可能是由于不同的有机质组成所致。对数据进行萃取后拟合，得出了老化土壤中用于生物可利用性预测的一致SFE萃取时间。
