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Non-radiological contaminants from uranium mining and milling at Ranger, Jabiru, Northern Territory, Australia

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Abstract

Protection from the hazards from radioactivity is of prime importance in the management of uranium mine and mill wastes. Such wastes also contain non-radiological contaminants (heavy metals, acids and neutralising agents) which give rise to potential long-term health and environmental hazards and short-term hazards to the aquatic ecosystem, e.g. as a result of release of waste water. This study seeks to identify non-radiological contaminants (elements) transferred to waste water at the Ranger uranium mine/mill complex at Jabiru, which are likely to hazardous to the aquatic environment.

The two principal sources of contaminants are:

  1. (i)

    ore and waste rock mobilised from mining; and

  2. (ii)

    process reagents used in the milling and mineral extraction process.

These substances may or may not already be present in the natural environment but may lead to deleterious effects on the aquatic environment if increased above threshold levels.

Rhenium, derived from the ore body, was found to be significantly enriched in waste water from Ranger, indicating its suitability as an indicator element for water originating from the mining and milling process, but only uranium, likewise derived from the ore, and magnesium, manganese and sulfur (as sulfate) from the milling process were found to be significant environmental contaminants.

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Authors and Affiliations

  1. Mines Environment Directorate, Department of Mines and Energy, GPO Box 2901, 0801, Darwin, N.T., Australia

    B. N. Noller

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Noller, B.N. Non-radiological contaminants from uranium mining and milling at Ranger, Jabiru, Northern Territory, Australia. Environ Monit Assess 19, 383–400 (1991). https://doi.org/10.1007/BF00401327

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