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

Research output: Contribution to journalJournal article

Published

Journal publication date12/2008
JournalEnvironmental Pollution
Journal number3
Volume156
Number of pages7
Pages664-670
Original languageEnglish

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 C-14-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. (C) 2008 Elsevier Ltd. All rights reserved.