Distribution of heavy metals in water, sediments and fish of the Carrizal River, Ecuador
Keywords:
river water, biomagnification, contamination, ichthyofauna, heavy metalsAbstract
This research aims to analyze the distribution of heavy metals (Pb, Cd and Cu) in water, sediments and fish from the Carrizal River, Manabí - Ecuador. 21 monitoring stations for water and sediment were carried out. In addition, liver, gill, and muscle tissue samples of Hoplias microlepis, Aequidens rivulatus, and Oreochromis niloticus were extracted; heavy metal content is determined by atomic absorption spectrophotometry. The Pb in water and sediments was 0,41 mg/L and 0,03 mg/kg, respectively. In gills of Hoplias microlepis (0,181 mg/kg) and in muscles of Aequidens rivulatus (0,149 mg/kg), the highest levels of Pb were found. The fish species presented undetectable levels of Cd or Cu. The level of Pb in surface water exceeds the established limit; evidencing a distribution and possible biomagnification of this metal.
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