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Using supercritical fluid extraction to measure the desorption and bioaccessibility of phenanthrene in soils

Authors
Journal
Environmental Pollution
0269-7491
Publisher
Elsevier
Publication Date
Volume
156
Issue
3
Identifiers
DOI: 10.1016/j.envpol.2008.06.021
Keywords
  • Supercritical Fluid Extraction
  • Phenanthrene
  • Bioaccessibility
  • Desorption

Abstract

Abstract 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 28 d. Desorption profiles were measured every 7 d 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.

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