Publication: Comparative study of the acute toxicity of anionic surfactans alky benzene
sulphonate (ABS) and sodium dodecyl sulphate
(SDS) on gilthead, Sparus aurata L., eggs
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Date
2001
Authors
Rosety, M.A. ; Ordóñez Muñoz, F.J. ; Rosety-Rodriguez, M. ; Rosety, J.M. ; Rosety, I. ; Carrasco, C. ; Ribelles, A.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
In the present work we have evaluated the
acute toxicity of two anionic surfactants, alkyl benzene
sulphonate (ABS) and sodium dodecyl sulphate (SDS) to
eggs of gilthead Sparus aurata. At each surfactant
concentration, we determined the exposure time required
for 50% mortality of the eggs (LT50), surface tension
and volume of oil globule in gilthead eggs.
Clear dose-response relationships for mortality of
gilthead eggs was observed for both toxicants; at 30
mg/L 50% mortality took place at 45 minutes for ABS
and 8 minutes for SDS. At this concentration, SDS was
almost six times more toxic than ABS (LT50 is
compared). However, at 0.3 mg/L 50% mortality
occurred after exposures of 535 minutes to ABS and 425
minutes to SDS. Descriptively, our results showed SDS
was more toxic than ABS at high concentrations whereas
at low concentrations their toxicity was very similar.
However, statistical analysis demonstrated there were no
significant differences in the toxicity of both surfactants
to gilthead eggs.
Surface tension value at each concentration of both
surfactants was also calculated. We found that these
values decreased with increasing concentration of each
surfactant, and this trend was more pronounced in solutions of SDS. We also found that the volume of the
oil globule of exposed eggs was influenced by
surfactants. After exposure, its volume clearly decreased
in comparison to controls, mainly in eggs exposed to
SDS.
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