Variation in the toxicity of sediment-associated substituted phenylamine antioxidants to an epibenthic (Hyalella azteca) and endobenthic (Tubifex tubifex) invertebrate.

Autor: Prosser RS; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada. Electronic address: prosserr@uoguelph.ca., Bartlett AJ; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Milani D; Environment and Climate Change Canada, Watershed Hydrology and Ecology Research Division, Burlington, Ontario, Canada., Holman EAM; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Ikert H; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Schissler D; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Toito J; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Parrott JL; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Gillis PL; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada., Balakrishnan VK; Environment and Climate Change Canada, Aquatic Contaminants Research Division, Burlington, Ontario, Canada.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2017 Aug; Vol. 181, pp. 250-258. Date of Electronic Publication: 2017 Apr 17.
DOI: 10.1016/j.chemosphere.2017.04.066
Abstrakt: Substituted phenylamine antioxidants (SPAs) are produced in relatively high volumes and used in a range of applications (e.g., rubber, polyurethane); however, little is known about their toxicity to aquatic biota. Therefore, current study examined the effects of chronic exposure (28 d) to four sediment-associated SPAs on epibenthic (Hyalella azteca) and endobenthic (Tubifex tubifex) organisms. In addition, acute (96-h), water-only exposures were conducted with H. azteca. Mortality, growth and biomass production were assessed in juvenile H. azteca exposed to diphenylamine (DPA), N-phenyl-1-napthylamine (PNA), N-(1,3-dimethylbutyl)-N'-phenyl-1,4-phenylenediamine (DPPDA), or 4,4'-methylene-bis[N-sec-butylaniline] (MBA). Mortality of adult T. tubifex and reproduction were assessed following exposure to the four SPAs. The 96-h LC50s for juvenile H. azteca were 1443, 109, 250, and >22 μg/L and 28-d LC50s were 22, 99, 135, and >403 μg/g dry weight (dw) for DPA, PNA, DPPDA, and MBA, respectively. Reproductive endpoints for T. tubifex (EC50s for production of juveniles > 500 μm: 15, 9, 4, 3.6 μg/g dw, for DPA, PNA, DPPDA, and MBA, respectively) were an order of magnitude more sensitive than endpoints for juvenile H. azteca and mortality of adult worms. The variation in toxicity across the four SPAs was likely related to the bioavailability of the sediment-associated chemicals, which was determined by the chemical properties of the SPAs (e.g., solubility in water, Koc). The variation in the sensitivity between the two species was likely due to differences in the magnitude of exposure, which is a function of the life histories of the epibenthic amphipod and the endobenthic worm. The data generated from this study will support effect characterization for ecological risk assessment.
(Crown Copyright © 2017. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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