Biodegradability of Atrazine, Cyanazine and Dicamba under methanogenic condition in three soils of China

Ji Guang Gu, Yanzhen Fan, Ji Dong Gu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Persistence and degradation of the herbicides Atrazine, Cyanazine and Dicamba were measured in laboratory microcosms incubated under methanogenic condition using three soils of China. Results showed that Atrazine was more resistant to degradation than Cyanazine and Dicamba for the 300 days of incubation. Between 30% and 40% of the initially introduced chemicals were found to be not recoverable through solvent extraction of the incubated soils. Our results also indicated that the half-life of these herbicides in the three soils generally followed: Atrazine > Cyanazine > Dicamba. Biodegradation of Cyanazine and Dicamba was further substantiated by establishing enrichment cultures in which the degradation of the respective herbicides could be accelerated by the microorganisms. Our results suggest that biodegradation of xenobiotics can be established through enrichment culture transfer technique and non-extractability of chemicals should be taken into account in evaluation of chemicals' fate and risk.

Original languageEnglish
Pages (from-to)1515-1521
Number of pages7
JournalChemosphere
Volume52
Issue number9
DOIs
StatePublished - Sep 2003
Externally publishedYes

Keywords

  • Atrazine
  • Cyanazine
  • Degradation
  • Dicamba
  • Enrichment culture
  • Herbicide
  • Metabolic pathway
  • Methanogenic condition

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