The Scientific World Journal

The Scientific World Journal / 2002 / Article
Special Issue

Analysis, Toxicity and Biodegradation of Organic Pollutants in Groundwater from Contaminated Land, Landfills and Sediments: Selected Peer-Reviewed

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Short Communication | Open Access

Volume 2 |Article ID 172496 | https://doi.org/10.1100/tsw.2002.205

Peggy Rigou, Steven John Setford, Selwayan Saini, "Field—Based Supercritical Fluid Extraction of Hydrocarbons at Industrially Contaminated Sites", The Scientific World Journal, vol. 2, Article ID 172496, 7 pages, 2002. https://doi.org/10.1100/tsw.2002.205

Field—Based Supercritical Fluid Extraction of Hydrocarbons at Industrially Contaminated Sites

Received05 Nov 2001
Revised28 Feb 2002
Accepted10 Mar 2002

Abstract

Examination of organic pollutants in groundwaters should also consider the source of the pollution, which is often a solid matrix such as soil, landfill waste, or sediment. This premise should be viewed alongside the growing trend towards field-based characterisation of contaminated sites for reasons of speed and cost. Field-based methods for the extraction of organic compounds from solid samples are generally cumbersome, time consuming, or inefficient. This paper describes the development of a field-based supercritical fluid extraction (SFE) system for the recovery of organic contaminants (benzene, toluene, ethylbenzene, and xylene and polynuclear aromatic hydrocarbons) from soils. A simple, compact, and robust SFE system has been constructed and was found to offer the same extraction efficiency as a well-established laboratory SFE system. Extraction optimisation was statistically evaluated using a factorial analysis procedure. Under optimised conditions, the device yielded recovery efficiencies of >70% with RSD values of 4% against the standard EPA Soxhlet method, compared with a mean recovery efficiency of 48% for a commercially available field-extraction kit. The device will next be evaluated with real samples prior to field deployment.


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