title: Using supercritical fluid extraction to measure the desorption and bioaccessibility of phenanthrene in soils.
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 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.
authors.affiliation: RECETOX, Research Centre for Environmental Chemistry and Ecotoxicology, Masaryk University, Kamenice 126/3, Brno CZ62500, Czech Republic. jacqueline.stroud@bbsrc.ac.uk
authors.forename: J L
authors.initials: JL
authors.lastname: Stroud
authors.forename: A H
authors.initials: AH
authors.lastname: Rhodes
authors.forename: K T
authors.initials: KT
authors.lastname: Semple
authors.forename: Z
authors.initials: Z
authors.lastname: Simek
authors.forename: J
authors.initials: J
authors.lastname: Hofman
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D018153:Czech Republic; D054750:Ecotoxicology / Q000379:methods*; D010616:Phenanthrenes / Q000032:analysis* / Q000633:toxicity; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis* / Q000633:toxicity; D013997:Time Factors
chemical_list: D010616:Phenanthrenes; D012989:Soil Pollutants; C031181:phenanthrene