Organochlorine Pesticide Residues in Water, Sediment, and Fish of Gilgel Gibe Reservoir and Tributaries, Ethiopia: Levels, Distribution and Risk Assessment
Investigation measures organochlorine pesticide levels in water, sediment, and fish, indicating low health risks for consumption.
Key Points
This research aims to analyze the levels and distribution of organochlorine pesticide residues in water, sediment, and fish from Gilgel Gibe Reservoir and its tributaries.
42 samples analyzed: 12 water, 12 sediment, and 18 fish specimens.
Organochlorine pesticides were extracted using liquid-liquid microextraction for water and Soxhlet extraction for sediment and fish.
Analysis conducted using gas chromatography-mass spectrometry.
Gamma-hexachlorocyclohexane was highest in Yadi River water at 10.97 µg/L.
Health Risk Index for fish species remained below critical value of 1, indicating no health risk for human consumption.
African catfish exceeded maximum residue limit for heptachlor epoxide at 225.22 µg/kg.