Evaluation of the sensitivity of three cladoceran species widely distributed in Mexico to three reference toxicants

Martínez‐Jerónimo, Fernando; Muñoz-Mejía, G.

doi:10.1080/10934520701480664

Cited by 15 publications

(2 citation statements)

References 29 publications

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“…Also, SDS was analysed due to its toxic effect to microorganisms and aquatic organisms (Martínez-Jerónimo and Muñoz-Mejía 2007 ; Yilmaz and Icgen 2014 ), and rhamnolipid was tested at high concentrations (10, 25, and 50%) for comparison due to its low toxicity.…”

Section: Resultsmentioning

confidence: 99%

Ecotoxicity of oil sludges and residuals from their washing with surfactants: soil dehydrogenase and ryegrass germination tests

Ramírez

Shaw

Collins

2020

Environ Sci Pollut Res

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Oil sludge washing (OSW) with surfactants and co-solvents is used to recover the oil, and this process leaves some residuals (sediments and surfactant solution). Currently, there are no data on the ecotoxicological effects of these OSW residuals from different sludges. This study evaluated the toxicity of OSW residuals from washing four types of oil sludges with five surfactants (Triton X-100 and X-114, Tween 80, sodium dodecyl sulphate (SDS) and rhamnolipid) and a co-solvent (cyclohexane). The toxicity of the residuals was evaluated with the impact on the soil microbial dehydrogenase activity (DHA) and ryegrass (Lolium perenne) seed germination. There was a high DHA detected directly in the sludges and all OSW residual combinations, but this activity could not be attributed to the DHA itself but to some chemical interferences. The DHA was then tested in the soils amended with the OSW residuals to simulate a bioremediation scenario. There were no chemical interferences in this case. In general, the INTF concentrations were significantly higher at low concentrations, 1 and 5% (p < 0.01). There were no significant differences in the DHA at high concentrations of OSW residuals (10, 25 and 50%) which implied that the concentration of the contaminants is not directly proportional to the levels of ecotoxicity. Unexpectedly, the INTF values of the 10, 25 and 50% rhamnolipid-OSW residuals were significantly lower than the Triton X-100 residuals. The ryegrass germination rates were higher than 70% with no apparent phytotoxicity symptoms in the seedlings. Particularly, there was a highly significant negative effect of the residuals on the germination rates at high concentrations (p < 0.01). Given that the extractable petroleum hydrocarbon (EPH) concentrations in the OSW residual-amended soils in both DHA and germination tests were very low (13–21 ppm), other co-contaminants could be contributing to the toxicity. These findings implied that biotreatment techniques can be applied to treat the OSW residuals if necessary.

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Section: Resultsmentioning

confidence: 99%

Ecotoxicity of oil sludges and residuals from their washing with surfactants: soil dehydrogenase and ryegrass germination tests

Ramírez

Shaw

Collins

2020

Environ Sci Pollut Res

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“…For example, the average LC50 of SDS for C. dubia was 8.59 AE 1.08 mg/L [24]. The LC50 value of SDS to a less sensitive species, Daphnia magna, was reported to be 28.8 mg/L [25].…”

Section: Toxicity Of Tested Surfactants and Thfmentioning

confidence: 98%

Aqueous suspension methods of carbon‐based nanomaterials and biological effects on model aquatic organisms

Gao

Llaneza

Youn

et al. 2011

Enviro Toxic and Chemistry

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The preparation of aqueous suspensions of carbon-based nanomaterials (NMs) requires the use of dispersing agents to overcome their hydrophobic character. Although studies on the toxicity of NMs have focused primarily on linking the characteristics of particles to biological responses, the role of dispersing agents has been overlooked. This study assessed the biological effects of a number of commonly used dispersing agents on Pseudokirchneriella subcapitata and Ceriodaphnia dubia as model test organisms. The results show that for a given organism, NM toxicity can be mitigated by use of nontoxic surfactants, and that a multispecies approach is necessary to account for the sensitivity of different organisms. In addition to the intrinsic physicochemical properties of NMs, exposure studies should take into account the effects of used dispersing fluids.

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Toxicity of Cadmium, Lead, Mercury and Methyl Parathion on Euchlanis dilatata Ehrenberg 1832 (Rotifera: Monogononta)

Arias-Almeida

Rico‐Martínez

2011

Bull Environ Contam Toxicol

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Acute toxicity tests with Cd, Pb, Hg, and methyl parathion were developed to compare the sensitivity of the rotifer Euchlanis dilatata with other model organisms used in aquatic ecotoxicology. Cd was the most toxic chemical (LC50 = 14.8 μg L(-1)), while methyl parathion was the least toxic (LC50 = 864.2 μg L(-1)). E. dilatata was more sensitive that other rotifer species, particularly of the genera Brachionus and Lecane. However, E. dilatata was less sensitive to mercury and methyl parathion than the crustacean, Daphnia magna. The high sensitivity of E. dilatata suggests that it may be an adequate benthic model to use in toxicity assessments of metal-contaminated sediments.

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Evaluation of the sensitivity of three cladoceran species widely distributed in Mexico to three reference toxicants

Cited by 15 publications

References 29 publications

Ecotoxicity of oil sludges and residuals from their washing with surfactants: soil dehydrogenase and ryegrass germination tests

Ecotoxicity of oil sludges and residuals from their washing with surfactants: soil dehydrogenase and ryegrass germination tests

Aqueous suspension methods of carbon‐based nanomaterials and biological effects on model aquatic organisms

Toxicity of Cadmium, Lead, Mercury and Methyl Parathion on Euchlanis dilatata Ehrenberg 1832 (Rotifera: Monogononta)

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