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Table 5

Concentration of heavy metals (copper not shown) in water with increased copper concentration after exposure to shungite (elements exceeding MAC are underlined)

ElementSH
Com
3rd day5th day3rd day5th day
Ni, μg/L 283 ± 28 212 ± 30 400 ± 40 225 ± 32 
Pb, μg/L 2.1 ± 0.2 2.8 ± 0.5 3.3 ± 0.3 0.8 
Zn, μg/L 290 ± 70 26 910 ± 210 43 ± 8 
Cd, μg/L 7.6 ± 1.7 1.5 ± 0.3 10 ± 2 0.9 ± 0.2 
Cr, μg/L 0.5 ± 0.1 <0.2 0.5 ± 0.1 <0.2 
As, μg/L <0.2 <0.2 <0.2 <0.2 
ElementSH
Com
3rd day5th day3rd day5th day
Ni, μg/L 283 ± 28 212 ± 30 400 ± 40 225 ± 32 
Pb, μg/L 2.1 ± 0.2 2.8 ± 0.5 3.3 ± 0.3 0.8 
Zn, μg/L 290 ± 70 26 910 ± 210 43 ± 8 
Cd, μg/L 7.6 ± 1.7 1.5 ± 0.3 10 ± 2 0.9 ± 0.2 
Cr, μg/L 0.5 ± 0.1 <0.2 0.5 ± 0.1 <0.2 
As, μg/L <0.2 <0.2 <0.2 <0.2 
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