5Stęż Pb w srodow
Natural Concentrations of the Heavy Elements
Background
Natural 4r Rural Urban Close to roads
40 100 100,000 500,000 >2,000,000
Background
Natural ^Rural/urban Industrial
20 50 200 >5000
Air (pg m 3)
Fresh water (ng l"1)
Sediment
Background
Natural ^ Urban Industrial
10 50 200 >10,000 Background Urban
Natural^Rural ^ Busy roads Paint
Soil {fig g ')
5 20 40 500 3000 >10,000
Background
Natural^Typical Toxic
Humań blood i/ig dl"1)
Humań body
Natural Typical Toxic
500 2000 x 30 ng/70 kg person
Fig 6.1 Natural and present day concentrations of lead. Source of data Patterson, 1980 [57]. Notę the log scalę.
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