Dynamics of PCB removal and detoxification in historically contaminated soils amended with activated carbon

Galina K. Vasilyeva, Elena R. Strijakova, Svetlana N. Nikolaeva, Albert T. Lebedev, Patrick J Shea

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Activated carbon (AC) can help overcome toxicity of pollutants to microbes and facilitate soil bioremediation. We used this approach to treat a Histosol and an Alluvial soil historically contaminated with PCB (4190 and 1585 mg kg-1, respectively; primarily tri-, tetra- and pentachlorinated congeners). Results confirmed PCB persistence; reductions in PCB extractable from control and AC-amended soils were mostly due to a decrease in tri- and to some extent tetrachlorinated congeners as well as formation of a bound fraction. Mechanisms of PCB binding by soil and AC were different. In addition to microbial degradation of less chlorinated congeners, we postulate AC catalyzed dechlorination of higher chlorinated congeners. A large decrease in bioavailable PCB in AC-amended soils was demonstrated by greater clover germination and biomass. Phytotoxicity was low in treated soils but remained high in untreated soils for the duration of a 39-month experiment. These observations indicate the utility of AC for remediation of soils historically contaminated with PCB.

Original languageEnglish (US)
Pages (from-to)770-777
Number of pages8
JournalEnvironmental Pollution
Volume158
Issue number3
DOIs
StatePublished - Mar 1 2010

Fingerprint

Detoxification
Polychlorinated Biphenyls
Polychlorinated biphenyls
Activated carbon
Soil
Carbon
Soils
Medicago
Dechlorination
Environmental Biodegradation
Bioremediation
Germination
Remediation
Biomass
Toxicity
Degradation

Keywords

  • Activated carbon
  • Bioavailability
  • Polychlorinated biphenyl
  • Soil bioremediation

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Dynamics of PCB removal and detoxification in historically contaminated soils amended with activated carbon. / Vasilyeva, Galina K.; Strijakova, Elena R.; Nikolaeva, Svetlana N.; Lebedev, Albert T.; Shea, Patrick J.

In: Environmental Pollution, Vol. 158, No. 3, 01.03.2010, p. 770-777.

Research output: Contribution to journalArticle

Vasilyeva, Galina K. ; Strijakova, Elena R. ; Nikolaeva, Svetlana N. ; Lebedev, Albert T. ; Shea, Patrick J. / Dynamics of PCB removal and detoxification in historically contaminated soils amended with activated carbon. In: Environmental Pollution. 2010 ; Vol. 158, No. 3. pp. 770-777.
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