Fly ash leachate induces oxidative stress in freshwater fish Channa punctata (Bloch)

M. Ali, S. Parvez, S. Pandey, F. Atif, M. Kaur, H. Rehman, S. Raisuddin

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Oxidative stress inducing potential of fly ash leachate (FAL) was studied in a freshwater fish, Channa punctata (Bloch). Fish were exposed to fly ash leachate for 24 h and lipid peroxidation (LPO) was studied as a marker of oxidative stress. Catalase (CAT), glutathione S-transferase (GST) activities and levels of reduced glutathione (GSH) were also estimated in the exposed fish. FAL (1 ml/l) induced LPO in all the organs and most prominent response was in the gill. It also caused induction of enzymes and glutathione. Liver showed highest level of induction of enzyme activities. The results of this study demonstrate that fly ash constituents have potential to induce oxidative stress in fish and gills are the most vulnerable organs. It is also suggested that in case of exposure to FAL, along with LPO antioxidant defense is also activated to counteract the reactive oxygen species (ROS) at least partly in the initial stages of exposure.

Original languageEnglish (US)
Pages (from-to)933-938
Number of pages6
JournalEnvironment international
Issue number7
StatePublished - Sep 2004
Externally publishedYes


  • Biomonitoring
  • Channa punctata
  • Fly ash
  • Gills
  • Oxidative stress

ASJC Scopus subject areas

  • General Environmental Science


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