Bioaugmentation of pentachlorophenol in soil and hydroponic systems

R. I. Dams, G. Paton, K. Killham

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Sphingobium chlorophenolicum is well known as pentachlorophenol (PCP) degrader. The objective of this study was to evaluate the PCP degradation in soil and hydroponic systems using a bioaugmentation technique. Measurements of PCP concentrations were carried out using high-performance liquid chromatography (HPLC) analyses. The toxic effect of PCP on plants was studied through the monitoring of plant weight. An acute toxicity assay of PCP was performed using Escherichia coli HB101 pUCD607. The introduction of S. chlorophenolicum into soil with plants showed a faster degradation when compared to the non-inoculated soil. In the soil system, plants acted as a vector to the target compound, PCP. The monitoring of the plant growth showed a protective role of S. chlorophenolicum against the toxicity of PCP. In the hydroponic system S. chlorophenolicum showed the ability to degrade 16mgl(-1) after 7 days of experiments at both concentrations tested (20 and 30mgl(-1) PCP). The bioassay confirmed that initial toxicity was lowered while degradation progressed in both systems. (c) 2007 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalInternational Biodeterioration & Biodegradation
Volume60
Issue number3
DOIs
Publication statusPublished - Oct 2007

Keywords

  • pentachlorophenol degradation
  • Sphingobium chlorophenolicum
  • hydroponic systems
  • soil systems
  • burkholderia SP RASC
  • strain ATCC 39723
  • flavobacterium-SP
  • sphingobium-chlorophenolicum
  • aromatic-hydrocarbons
  • contaminated soil
  • heavy-metals
  • rhizosphere
  • degradation
  • bioremediation

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