Effects of a chelating resin on metal bioavailability and toxicity to estuarine invertebrates

Divergent results of field and laboratory tests

Emma M. Wilkie*, Anthony C. Roach, Tina Micevska, Brendan P. Kelaher, Melanie J. Bishop

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Benthic invertebrates can uptake metals through diffusion of free ion solutes, or ingestion of sediment-bound forms. This study investigated the efficacy of the metal chelating resin SIR 300™ in adsorbing porewater metals and isolating pathways of metal exposure. A field experiment (Botany Bay, Sydney, Australia) and a laboratory toxicity test each manipulated the availability of porewater metals within contaminated and uncontaminated sediments. It was predicted that within contaminated sediments, the resin would adsorb porewater metals and reduce toxicity to invertebrates, but in uncontaminated sediments, the resin would not significantly affect these variables. Whereas in the laboratory, the resin produced the predicted results, in the field the resin increased porewater metal concentrations of contaminated sediments for at least 34 days and decreased abundances of four macroinvertebrate groups, and richness in all sediments. These contrasting findings highlight the limits of extrapolating the results of laboratory experiments to the field environment.

Original languageEnglish
Pages (from-to)1261-1269
Number of pages9
JournalEnvironmental Pollution
Volume158
Issue number5
DOIs
Publication statusPublished - May 2010
Externally publishedYes

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