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Scientifica
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2020
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Article
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Tab 2
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Research Article
Physicochemical Characterization of Mining Waste from the Betare-Oya Gold Area (East Cameroon) and an Adsorption Test by Sabga Smectite (North-West Cameroon)
Table 2
Relative concentration of the heavy metals analyzed.
Parameters
Unit
Concentrations
WHO standards
Min
Med
Max
Cu
mg·L
−1
0
0.005
0.01
2
Zn
mg·L
−1
0
0.015
0.03
3
Ni
mg·L
−1
0
0
0
0.02
Mn
mg·L
−1
0.04
0.12
0.2
0.05
Fe
mg·L
−1
0.4
2.15
3.9
0.3
Cr
mg·L
−1
0.02
0.02
0.02
0.05
As
mg·L
−1
0.005
0.015
0.025
0.01
Pb
mg·L
−1
0.012
0.018
0.024
0.01