Abstract
A programme to determine the immediate impact of a new nickel refinery on sediment metal levels in Halifax Bay, North Queensland was begun in May, 1975. The results indicate that within three weeks of the initiation of continuous refinery discharge to the Bay, area levels of at least one element (cobalt) had been significantly increased. In addition, samples taken from nearshore river mouth stations located near the plant also showed relatively high levels of nickel which may not be attributable to the plant's effluent discharge. The field data together with laboratory experiments suggest that future levels of cobalt, nickel and iron may be expected to increase significantly in Halifax Bay as a direct result of the refinery.
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