Skip to main content

Table 3 Heavy metal content (mg/kg) of food crop of farmland

From: Bioaccumulation of heavy metals in soil and selected food crops cultivated in Kogi State, north central Nigeria

Crops Values Cd Co Cu Ni Pb Zn
Pumpkin Range 0.12–2.17 0.01–3.17 1.36–2.60 0.06–5.54 0.07–0.27 1.81–20.9
Mean + SD 0.41 ± 0.42 0.47 ± 0.82 1.76 ± 0.19 1.1 ± 1.2 0.15 ± 0.05 12.8 ± 6.1
Maize Range 0.15–0.30 0.02–0.55 1.61–2.88 2.9–46.2 0.16–0.75 30.6–40.4
Mean + SD 0.19 ± 0.03 0.12 ± 0.13 2.43 ± 0.29 25 ± 10 0.42 ± 0.22 33.1 ± 2.4
Passion fruit Range 0.09–0.28 0.01–0.02 7.23–9.80 8.04–30.6 0.04–0.13 6.63–19.7
Mean + SD 0.15 ± 0.05 0.02 ± 0.01 8.13 ± 0.29 14.7 ± 6.2 0.29 ± 0.17 12.2 ± 3.1
Cassava Range 0.01–0.29 0.01–0.05 0.60–4.61 5.32–47.3 0.03–0.31 3.08–29.3
Mean + SD 0.13 ± 0.01 0.20 ± 0.05 2.44 ± 0.17 34 ± 19 0.10 ± 0.01 14.7 ± 1.7
Sugar cane Range 0.11–0.27 0.01–0.03 2.41–3.65 10.5–20.4 0.04–0.32 11.9–19.0
Mean + SD 0.14 ± 0.04 0.02 ± 0.01 2.88 ± 0.23 14.2 ± 2.3 0.20 ± 0.12 16.5 ± 0.8
Standard limit   0.1–0.2ab 0.01a 20ab 10b 9b, 0.3ac 100ab
  1. aFAO/WHO (2011)
  2. bSEPA (2005)
  3. cEEC (1977)