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Table 5 Concentration of trace metals in sediments and its comparison with sediment quality guidelines (SQGs) in mg/kg dry wt

From: Distribution and ecological risk assessment of trace metals in surface sediments from Akaki River catchment and Aba Samuel reservoir, Central Ethiopia

Element This study mean This study range SQG non polluted SQG moderately polluted SQG heavily polluted
Dry season Rainy season Dry season Rainy season
Cd 2.6 2.7 2.1–2.9 2.5–3.1 > 6
Cr 27.2 24.4 16.2–43.7 18.3–29.4 < 25 25–75 > 75
Cu 5.1 3.4 1.6–15.3 2.1–6.2 < 25 25–50 > 50
Pb 153.8 124.2 124.4–256.4 101.4–133.7 < 40 40–60 > 60
Ni 23.6 20.6 15.6–36.2 14.6–24 < 20 20–50 > 50
Zn 25.8 20.2 4.0–110.0 4.8–38.2 < 90 90–200 > 200