Units
OCP WATER (before tailings contact)
OCP WATER (after tailings contact)
Var
Properties pH
-
4.1
4.2
TDS
mg/L mg/L
9,857
9,887
Hardness (as CaCO3)
12,564
13,078
+514
Anions
Chloride Sulphate
mg/L mg/L
270
290
8,400
7,600
-800
Cations (dissolved) Sodium as Na Calcium as Ca Aluminium as Al
mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L
730 490
800 460 510
1,400
-890
Copper as Cu
79
18 59 17
-61 +59 -59
Iron as Fe Lead as Pb
1
76
Magnesium as Mg Manganese as Mn
2,800
2,900
200
210
Zinc as Zn
60
53
4) Conclusions This test confirmed an overall improvement in the OCP water quality after adding final tailings residue from the ReCYN plant. There was a significant reduction in the aluminium, copper, lead and sulphate concentrations, with iron being the only metal concentration to increase. There were negligible changes in all other anion and cation concentrations.
Peter Papa (GGT Technical Director)
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