Table 7 Chronic risk assessment (CDI) for the metals in the groundwater samples from settlements around the Bosomtwe Crater Lake and water samples from the lake through the ingestion pathway during the wet and dry seasons for adults and children
Dry season | Wet season | |||||||
|---|---|---|---|---|---|---|---|---|
Lake water | Underground | Lake water | Groundwater | |||||
Adults | Children | Adult | Children | Adult | Children | Adult | Children | |
Fe | 6.29 × 10−3–1.19 × 10−2 | 2.40 × 10−2–4.56 × 10−2 | 6.29 × 10−3–1.82 × 10−2 | 2.40 × 10−2–6.96 × 10−2 | 8.49 × 10−3–6.24 × 10−2 | 3.24 × 10−2–2.39 × 10−1 | 8.17 × 10−3–3.21 × 10−2 | 3.12 × 10−2–1.22 × 10−1 |
Pb | 1.89 × 10−3–5.34 × 10−3 | 7.20 × 10−3–2.04 × 10−2 | 2.83 × 10−3–5.34 × 10−3 | 1.08 × 10−2–2.04 × 10−2 | 1.26 × 10−3–3.46 × 10−3 | 4.80 × 10−3–1.32 × 10−2 | 1.57 × 10−3–3.77 × 10−3 | 6.00 × 10−3–1.44 × 10−2 |
Zn | 3.14 × 10−3–6.60 × 10−3 | 1.20 × 10−2–2.52 × 10−2 | 3.77 × 10−3–1.07 × 10−4 | 1.44 × 10−2–5.91 × 10−6 | 2.83 × 10−3–5.03 × 10−5 | 1.08 × 10−2–1.92 × 10−2 | 4.40 × 10−3–8.8 × 10−3 | 1.68 × 10−2–3.36 × 10−2 |
Cr | 3.14 × 10−4–1.57 × 10−3 | 1.20 × 10−3–6.00 × 10−3 | 3.14 × 10−4–8.80 × 10−3 | 1.20 × 10−3–3.36 × 10−3 | 3.14 × 10−4–6.29 × 10−4 | 1.20 × 10−3–2.40 × 10−3 | 3.14 × 10−4–9.43 × 10−4 | 1.20 × 10−3–3.60 × 10−3 |
Ni | 0–6.29 × 10−4 | 0–2.40 × 10−3 | 0–6.29 × 10−4 | 0–2.40 × 10−3 | 0–0 | 0–0 | 0–5.97E−03 | 0–2.28E−02 |