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Metals, arsenic and lead isotopes in near-pristine estuarine and marine coastal sediments from northern Australia

Munksgaard, Niels C. and Parry, David L. (2002). Metals, arsenic and lead isotopes in near-pristine estuarine and marine coastal sediments from northern Australia. Marine and Freshwater Research,53(3):719-729.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 16 times in Scopus Article | Citations

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Title Metals, arsenic and lead isotopes in near-pristine estuarine and marine coastal sediments from northern Australia
Author Munksgaard, Niels C.
Parry, David L.
Journal Name Marine and Freshwater Research
Publication Date 2002
Volume Number 53
Issue Number 3
ISSN 1323-1650   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-0036328785
Start Page 719
End Page 729
Total Pages 11
Place of Publication Victoria, Australia
Publisher CSIRO Publishing
Field of Research 0402 - Geochemistry
0405 - Oceanography
0704 - Fisheries Sciences
HERDC Category C1 - Journal Article (DEST)
Abstract Arsenic and selected metal concentrations, as well as Pb isotope ratios, are reported for sediments from thirteen estuaries and coastal areas along tropical northern Australia. A close approximation of total As, Fe, Mn, Co, Ni, Cu, Zn, Cd and Pb concentrations were derived by a perchloric + nitric acid digestion procedure and the potentially bioavailable fractions were extracted by 1M hydrochloric acid. Total concentrations were at near-pristine levels and although some significant variations were observed amongst the areas studied, concentration ranges are similar to those published for other areas in the region with little anthropogenic input. The potentially bioavailable fraction of each metal (average % +/- 1 s.d.) for all areas are: Mn (65 +/- 11) > Pb (50 +/- 9) > Cd (43 +/- 23) > Co (33 +/- 5) > Cu (27 +/- 5) > As (21 +/- 8) > Ni (15 +/- 5) Fe (13 +/- 6) Zn (13 +/- 5). The potentially bioavailable fractions for Mn, Co and Ni are similar to published data for globally averaged river particulates. The isotope ratios of naturally derived Pb are catchment specific and of potential value in tracing the provenance of marine coastal and offshore terrigenous sediments. Concordant isotopic ratios for potentially bioavailable Pb and total Pb confirm that there is little anthropogenic Pb in the sediments.
Keywords bioavailability
acid volatile sulfide
heavy-metals
particulate matter
trace-metals
ratios
seawater
gulf
contamination
carpentaria
DOI http://dx.doi.org/10.1071/MF01060   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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