Research Article

Geochemical Association of Ni 2+ , Zn 2+ , Pb 2+ , Ag + , Cu 2+ , and Co 2+ Ions in Natural Pyrite

Table 1

Adsorption edge (pH50) of metal ions in absence and presence of a second metal ion and their correlation coefficients in presence of a second metal ion.

Metal ionIn presence ofPH50Correlation coefficient

None6.8
7.10.959
7.60.969
8.50.964
6.70.962
7.10.960

None7.5
6.90.903
6.90.919
6.60.889
6.80.921
6.60.904

None5.5
6.50.499
6.30.901
6.40.797
6.60.774
6.40.853

None8.9
5.2, 9.10.941
5.9, 9.50.969
6.6, 8.30.861
5.1, 8.60.946
6.6, 8.60.889

None5.8
5.80.868
5.70.838
5.60.802
5.60.809
5.60.800

None8.6
7.90.940
7.20.942
6.6, 8.60.939
6.4, 8.60.971
5.5, 7.80.960