Acid leached analyses of stormdrain and harbor sediments, New Zealand |
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| Authors: | P J Pilotto J R Goff D C Weatherburn |
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| Institution: | (1) Department of Chemistry, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand, NZ;(2) School of Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand, NZ |
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| Abstract: | Sediments from stormdrain catchments in Wellington city and sediment traps from Wellington Harbor were sampled for trace
metal content. Samples were analyzed for acid leached metal content by extraction with 0.11 mol acetic acid l–1 and using ICP-MS. Cu and Zn levels in harbor sediment traps increased towards the periphery of the harbor, while Pb levels
adjacent to a road almost doubled. In general, areas of light industry in the Inner City stormdrain catchments exhibited higher
acid leached metal concentrations. However, large-scale renovation work probably contributed to point sources of high metal
levels. The proximity of stormdrain outlets to recreational activities, such as wharf fishing and shellfish gathering, should
be of prime concern to local authorities.
Some positive correlations are found between acid leached and total metal levels. These may prove useful for assessing the
biological impact of significant increases in total metal concentrations in the vicinity of Wellington Harbor. Significant
savings in the time and costs of analyses may be achieved.
Received: 27 February 1998 · Accepted: 27 April 1998 |
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| Keywords: | Stormdrains Sediment traps Trace metals Extraction Wellington |
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