Supervising Scientist Division

Capacity of waters in the Magela Creek system, Northern Territory, to complex copper and cadmium

Technical Memorandum 7
Hart BT and Davies SHR
Supervising Scientist, 1984
ISSN 0810-9532
ISBN 0 644 01261 7

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About the report

Two methods were used to determine the concentrations of copper-binding ligand (complexing capacity) and conditional formation constants for waters collected from the Magela Creek system, Northern Territory.

These data are particularly important in estimating the concentrations of toxic forms of copper that may result from particular effluent discharge strategies for the Ranger uranium operation.

An amperometric titration technique, employing differential pulse anodic stripping voltammetry at pH 6.0, was used to determine the copper-complexing capacity in water samples taken from five billabongs at the end of the 1979 dry season and from five sites in Magela Creek during the 1980 wet season. These results are discussed in detail and a number of management implications drawn from them.

An ion-exchange resin technique, employing Dowex 50WX8 at pH 7.0, was used to determine the copper-complexing capacity in three billabong waters collected during the 1979 dry season. The results are discussed and compared with those determined at the lower pH using the other technique. A preliminary study of the cadmium-complexing capacity using the ion-exchange resin technique is also reported.

Cover - Capacity of waters in the Magela Creek system, Northern Territory, to complex copper and cadmium

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