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Biodegradation

, Volume 12, Issue 6, pp 419–432 | Cite as

Degradation of dissolved and sorbed 2,4-dichlorophenol in soil columns by suspended and sorbed bacteria

  • Göran Bengtsson
  • Christel Carlsson
Article

Abstract

The influence of sorption of bacteria, as well as 2,4-dichlorophenol (2,4-DCP), on themineralization of 100 μg l-1 of the organic compound was examined in an aquifer material under advective flow conditions (column displacement technique). The study was designed to distinguish the rates and extent of biodegradation of the sorbed and the dissolved trace organic and the contribution of sorbed and suspended bacteria to the degradation. The degradation of dissolved 2,4-DCP was significantly faster thanthe degradation of the same compound sorbed to the solids, and suspended bacteriadegraded the dissolved compound at a higher rate than sorbed bacteria, also on a percell basis. The suspended bacteria degraded 8–12% of the added dissolved 2,4-DCP, while sorbed bacteria made a smaller contribution by degrading about 5% of sorbed 2,4-DCP. No degradation was seen with sorbed 2,4-DCP and suspended bacteria, and a marginal contribution was made by sorbed bacteria on the degradation of dissolved 2,4-DCP (<0.4%).

aquifer bioremediation breakthrough diffusion Pseudomonas sorption 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Göran Bengtsson
    • 1
  • Christel Carlsson
    • 1
  1. 1.Department of EcologyLund UniversityLundSweden Author for correspondence

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