Assessing the Efficacy of a Sediment Remediation Program Using Benthic and Pelagic Copepod Bioassays.

Autor: Charry MP; Cawthron Institute, Nelson, New Zealand.; School of Biological Sciences, University of Auckland, Auckland, New Zealand., Keesing V; Boffa Miskell, Wellington, New Zealand., Gaw S; School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand., Costello MJ; Institute of Marine Science, University of Auckland, Auckland, New Zealand., Champeau O; Cawthron Institute, Nelson, New Zealand., Tremblay LA; Cawthron Institute, Nelson, New Zealand.; School of Biological Sciences, University of Auckland, Auckland, New Zealand.
Jazyk: angličtina
Zdroj: Environmental toxicology and chemistry [Environ Toxicol Chem] 2020 Feb; Vol. 39 (2), pp. 492-499. Date of Electronic Publication: 2019 Dec 27.
DOI: 10.1002/etc.4632
Abstrakt: Tributyltin is an organotin chemical that has been commonly used in ship antifouling paints. Despite the global total prohibition of tributyltin-based paint in 2008, tributyltin continues to be found at toxic levels in areas of high maritime traffic such as ports and harbors. A remediation program was conducted at a New Zealand port to reduce tributyltin and copper concentrations to acceptable values. The present study assessed the efficacy of the program using a combination of chemical analyses and copepod bioassays. Sediment and water samples were collected at 3 locations along a spatial gradient within the port, and concentrations of various organotin compounds and trace metal levels were measured pre- and postremediation. The toxicity of sediment and elutriate samples was estimated by benthic and pelagic copepod bioassays. Although acute toxicity in sediment samples was reduced following remediation, reproductive success was still affected for the benthic copepod. This approach combining chemical analysis and bioassays is promising for assessing the efficacy of remediation processes at contaminated marine sites. Environ Toxicol Chem 2020;39:492-499. © 2019 SETAC.
(© 2019 SETAC.)
Databáze: MEDLINE
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