Linking chemical extraction to microbial degradation of 14C-hexadecane in soil

Jacqueline L. Stroud, Graeme I. Paton, Kirk T. Semple*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Chemical extractions have been shown to measure the biodegradable fraction of aromatic contaminants in soil; however, there is little research on the chemical prediction of aliphatic hydrocarbon degradation. The aim of this study was to investigate the potential for cyclodextrin extractions to predict hexadecane biodegradation in soil. Soils were amended with 10 or 100 mg kg-1 of a model alkane n-hexadecane and 100 Bq g-1 14C-n-hexadecane. Correlations between the extents of mineralisation and extractions of the 14C-contaminant were determined. Solvent shake extractions and aqueous CaCl2 extractions were poor predictors of hexadecane bioaccessibility. However, the novel HP-α-CD shake extraction showed close correlation (r2 = 0.90, n = 36, p < 0.05) to the mineralisation data. This novel extraction technique has the potential to be used to assess the biodegradable aliphatic hydrocarbon fraction in contaminated soils.

Original languageEnglish
Pages (from-to)474-481
Number of pages8
JournalEnvironmental Pollution
Volume156
Issue number2
DOIs
Publication statusPrint publication - Nov 2008
Externally publishedYes

Keywords

  • Aliphatic hydrocarbons
  • Bioaccessibility
  • Cyclodextrin
  • Hexadecane

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