Environmental Impact Of Soluble Oils
Author(s)
S. Riley, C. McQuade, S. Adeloju & R. Hyne
Abstract
The objective of the study was to determine the level of soluble oil at which the
environmental risk of its discharge is unacceptable. Specifically, the potential
toxicity to aquatic species of mine water discharge containing soluble hydraulic
oil emulsions was determined. The study was undertaken at a mine site in the
Western Coal Fields of the Blue Mountains, Australia, and involved risk analysis
and toxicity and chemical testing of water discharged at the pit head. Some
initial problems were encountered in toxicity testing when the background
stream waters draining a relatively undisturbed catchment proved to be toxic to
the test organisms. This toxicity was determined to be related to fine-grained
sediment in the water. The study supported the soluble oil manufacturer’s claims
that there is a 90 to 95% decrease in soluble oil concentrations as a result of
biodegradation over a 28 day period. In normal mine operations soluble oil
appears to biodegrade before it reaches the surface. Normal soluble oil usage in
mine operations does not appear to be a risk to the environment unless there is a
substantial spill that is then pumped to the surface and discharged directly into
receptor streams. Such spills are rare, but have been known to occur
Keywords: soluble oil, mine water toxicity, environmental impact of mines.
1 Introduction
Soluble hydraulic oil is an integral component of all longwall operations,
typically used as a five percent solution with water. The daily quantity used in
Keywords
soluble oil, mine water toxicity, environmental impact of mines.
Related Book
Other papers in this volume
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