Table 2: The concentrations (µg/g) of toxic heavy metals in vegetable samples (n = 16) collected from the study area.
Sampling sites | Suburbs | Toxic heavy metals | |||
As | Cd | Pb | Hg | ||
Atonsu | 1.998 | 0.836 | 4.707 | < LOD | |
Farms | Chirepatre | 2.938 | 0.084 | 3.809 | < LOD |
KNUST | 2.585 | 0.191 | 4.002 | < LOD | |
Tanoso | 0.294 | 0.275 | 2.870 | < LOD | |
Ayigya | 1.410 | 0.191 | 2.943 | 0.020 | |
Markets | Kejetia | 1.293 | 0.287 | 3.661 | < LOD |
Kwadaso | 3.114 | 0.191 | 3.419 | < LOD | |
Santasi | 1.293 | 0.550 | 2.585 | < LOD | |
Street Food Vending Sites | Aboabo | 2.125 | 0.270 | 1.872 | 0.010 |
Asafo | 1.184 | 0.367 | 1.687 | < LOD | |
Bantama | 3.812 | 0.741 | 2.882 | < LOD | |
KNUST | 1.036 | 0.330 | 2.315 | < LOD | |
Adum | 2.187 | 0.151 | 6.337 | < LOD | |
Airport Roundabout | 4.101 | 0.028 | 1.417 | < LOD | |
Fante New Town | 1.100 | 0.160 | 4.190 | < LOD | |
Cafetaria | Suame | 3.451 | 0.253 | 2.814 | < LOD |
< LOD = Below detectable limits.