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Copper bioavailability and amelioration of toxicity in Macquarie Harbour, Tasmania, Australia

Citation

Stauber, JL and Benning, RJ and Hales, LT and Eriksen, RS and Nowak, BF, Copper bioavailability and amelioration of toxicity in Macquarie Harbour, Tasmania, Australia, Marine and Freshwater Research, 51, (1) pp. 1-10. ISSN 1323-1650 (2000) [Refereed Article]

DOI: doi:10.1071/MF99010

Abstract

The 100-year operation of the Mount Lyell Mining and Railway Company Limited's copper mine in Queenstown, Australia, has resulted in the deposition of over 100 million cubic metres of mine tailings, smelter slag and topsoil into the King River and Macquarie Harbour. A preliminary risk assessment, together with chemical measurements of dissolved copper, ASV-labile copper, copper complexing capacity and resin-adsorbed copper, suggested that copper in mid-salinity harbour waters was potentially bioavailable. However, toxicity tests based on inhibition of microalgal (Nitzschia closterium) growth showed that copper in these waters was not toxic, even though labile copper concentrations (6-24 μg L-1) exceeded the concentration of lowest observable effect for algae of 5 μg L-1. Measurements of intracellular and membrane-bound copper confirmed that cell division was not affected because copper was not taken up intracellularly. Amelioration of copper toxicity was due to binding of dissolved organic matter and/or other metals at the cell membrane, preventing copper binding and uptake. An understanding of the mechanism of copper toxicity and its amelioration is vital to assessing various clean-up options for the harbour.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Other Chemical Sciences
Research Field:Environmental Chemistry (incl. Atmospheric Chemistry)
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Mining Environments
Author:Eriksen, RS (Dr Ruth Eriksen)
Author:Nowak, BF (Professor Barbara Nowak)
ID Code:18339
Year Published:2000
Web of Science® Times Cited:36
Deposited By:TAFI - Aquaculture
Deposited On:2000-08-01
Last Modified:2011-08-03
Downloads:0

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