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Effect of Fluoride on Levels of Selected Toxic Heavy Metals in Gills of Edible Fresh Water Fish Tilapia mossambica from Keenjhar Lake, Sindh, Pakistan

Author Affiliations

  • 1Department of Biochemistry, Jinnah University for Women, 5-C Nazimabad, Karachi–74600, PAKISTAN
  • 2Department of Chemistry, University of Karachi, Karachi–75270, PAKISTAN
  • 3Department of Biotechnology, Jinnah University for Women, 5-C Nazimabad, Karachi–74600, PAKISTAN

Int. Res. J. Environment Sci., Volume 2, Issue (10), Pages 44-48, October,22 (2013)


The present research work was conducted to examine the lethal effects of inorganic fluoride (F–) on accumulation of toxic heavy metals in gills of edible fresh water fish Tilapia mossambica collected from Keenjhar Lake, Sindh, Pakistan. Levels of selected toxic metals like Lead (Pb), Mercury (Hg), Cadmium (Cd). Cobalt (Co) and Arsenic (As) at different time intervals with fluoride concentration 1.5 g/70L NaF and 3 g/70L NaF in the gills of Tilapia mossambica were determined by using Perkin – Elmer Atomic Absorption Spectrophotometer at parts per million (ppb) level. High concentration of toxic heavy metals (Pb, Hg, Cd, Co and As) showed that fluoride increase gills membrane permeability results in minerals unbalancing in fresh water fish Tilapia mossambica from Keenjhar Lake, Sindh, Pakistan. The order of metals accumulation in gills, vital organ for respiration was cobalt > arsenic > lead > mercury > cadmium at both doses and all exposure time intervals.


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