Toxicity of a mixture of monoaromatic hydrocarbons (BTX) to a tropical marine microcrustacean

Nascimento, Meggie Karoline Silva; Loureiro, Susana; Souza, Michel Rubens dos Reis; Alexandre, Marcelo R.; Nilin, Jeamylle

doi:10.1016/j.marpolbul.2020.111272

Cited by 11 publications

(5 citation statements)

References 52 publications

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“…Using the test method with Mysidopsis juniae, according to NBR 15308 (ABNT, 2017), it allowed to determine the LC50%, which is the median lethal concentration that causes mortality or immobility at 50% of M. juniae after the 96-hour exposure period, being it calculated by the Trimmed Spearman-Karber method (Hamilton et al, 1977). Making inference about the acceptable internal laboratory quality control, in all experiments, mortality did not exceed 10% in the negative control and sensitivity of M. juniae to zinc, a LC50-96 h of 0.26 ± 0.05 mg/L was reached, within the values reported by Figuerêdo et al (2016a), Figuerêdo et al (2016b), Nilin et al (2019) and Nascimento et al (2020), ranging from 0.25 to 0.46 mg/L. Thus, the sensitivity of organisms is a determining factor of environmental impact, as well as the intensity and frequency of exposure (Connon et al, 2012).…”

Section: Acute Toxicity -Mysidopsis Juniaesupporting

confidence: 81%

Models for BTEX evaluation in cases of oil spill on the sea, using Experimental Desing

Anjos¹,

Silva²,

Silva³

et al. 2021

RSD

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The objective of this study was to evaluate and obtain mathematical models, using the experimental design methodology, capable of predicting the contamination of benzene, toluene, ethylbenzene and xylenes (BTEX) in cases of oil spillage at sea, and to evaluate the acute toxicity of the soluble petroleum fraction (FSA). The factorial experimental planning was developed to describe the concentration of each compound according to the variables: oil °API, contact time oil/seawater after spillage and ambient temperature. The models presented can be used to quantitatively predict BTEX contamination in seawater with accuracy greater than 99%, within the studied ranges. The contact time oil seawater was the most determining factor in the concentration/contamination of BTEX in the Petroleum FSA. According to CL50% the soluble fraction of oil of °API 39.8 showed higher toxicity, with a LC50% of 46.07 with 1 h, and 11.38 with 96 hours of contact time oil/seawater, while the oil °API 32.8 showed lower toxicity, however presented higher concentrations of BTEX in FSA, this is possibly due to the synergistic effect of other hydrocarbons that became bioavailable to Mysidopsis juniae during the tests. The samples demonstrated potential environmental risk in cases of oil spillage, and these results can help in the development of a risk assessment of oil spills and serve as a useful analytical tool for emergencies.

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Section: Acute Toxicity -Mysidopsis Juniaesupporting

confidence: 81%

Models for BTEX evaluation in cases of oil spill on the sea, using Experimental Desing

Anjos¹,

Silva²,

Silva³

et al. 2021

RSD

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“…Numerous studies have pointed out that BTEX is a reproductive toxicant (Djemil et al, 2015; Hannigan & Bowen, 2010; Sirotkin et al, 2012; Webb et al, 2014). Nascimento et al (2020) evaluated the toxicity of benzene, toluene, and xylenes (BTX), isolated and in binary mixtures, to the microcrustacean Mysidopsis juniae and concluded that xylene is less toxic, followed by toluene and benzene (the most toxic). Peng et al (2015) reported the same toxicity sequence regarding morphological change, lipofuscin formation, and decreased chlorophyll content in Euglena gracilis Z exposed to BTEX (Peng et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Magnetized vermiculite as a tool for the treatment of produced water generated by oil companies: Effects on aquatic organisms before and after treatment

Viana

Campos

Bartilotti

et al. 2023

J of Applied Toxicology

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Produced water (PW) generated by oil companies is a highly impacting waste that contains chemicals such as metals and organic and inorganic compounds. Given its polluting potential, PW requires effective treatment before being discharged into the environment. Conventional treatments have limited efficiency in removing PW toxicity, so alternative approaches must be developed and standardized. In this context, treatment with adsorbent materials like magnetized vermiculite (VMT-mag) is highlighted. This work aimed to evaluate the efficiency of treatment with VMT-mag in reducing PW toxicity to aquatic biota. For this purpose, three aquatic species (the midge Chironomus riparius, the planarian Girardia tigrina, and the crustacean Daphnia magna) were exposed to untreated PW and to PW treated with VMT-mag at laboratory conditions. The assessed endpoints included mortality, growth, emergence, and developmental time of C. riparius; mortality, locomotion, feeding, and head regeneration of G. tigrina; and intrinsic population growth rate (r) and reproductive output of D. magna. The results showed that all the species exposed to raw PW were impaired: C. riparius had delayed development, G. tigrina had reduced locomotor activity and delayed head regeneration, and D. magna had reduced reproduction and delayed intrinsic population growth rate (r). Most of the analyzed parameters showed that treatment with VMT-mag diminished PW toxicity. Therefore, using VMT-mag to treat PW may be the key to reducing the PW effects on aquatic organisms.

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“…In the case of oil spill response it may also be possible to indicate the efficacy of mitigation procedures, thus helping to inform decision makers and net environmental benefit analysis in real time (Colvin et al 2021). In Brazil, the recommended bioassay is the acute toxicity test (96 h), with Mysidopsis juniae, once that this is considered a specie sensitive to several potential pollutants in marine and estuarine ecosystems (Figuerêdo et al 2016a, b;Nascimento et al 2020). Although the bioassay with Mysidopsis juniae is often carried out in the environmental monitoring of oil activities, and required by environmental inspection agencies, there is few data regarding the effects of the compounds present in the oil.…”

Section: Evaluation Of Toxicity For Mysidopsis Juniae Species In Case...mentioning

confidence: 99%

Evaluation of Toxicity for Mysidopsis Juniae Species in Cases of Oil Spill in the Brazilian Potiguar Basin

Anjos¹,

Silva²,

Silva³

et al. 2023

Rev. Foco

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This study aimed to assess the toxicity of the water soluble fraction (WSF) and correlate the effects of three oils and their compositions, through the bioassay with the Mysidopsis juniae, the analysis of n-alkanes and specific gravity. The PET01 and PET02 oils were classified as light oils ºAPI 39.8 and 32.8 and paraphynics with more abundant n-alkane ranges from n-C10 to n-C16, and n-C9 to n-C32. The PET03 oil was classified as heavy (°API 19.7), with more abundant hydrocarbons in the range of n-C29 and n-C33. It was also possible to evaluate the concentrations of metals in petroleum, Ba (3.41-4.45 mg/kg), Fe (5.42-9.01 mg/kg), Zn (0.18-0.53 mg/kg) and Ni (1.77-3.55 mg/kg) were present in the composition and may have harmful effect even at low concentrations. The acute toxicity of WSF from the oils varied by oil type, with LC50 11.4-27.6 of % WSF. Spill simulations indicated that short-term exposures in areas spilled with these oils are less toxic, but with increasing oil and seawater contact time (>1 h), the toxicity and solubility of total BTEX increases. The toxicity of the samples was directly related to the composition of the oils and categorized by the ecotoxicological risk to the environment from PET01 > PET02 > PET03. These results provide reliable data for ecotoxicological risk assessments in cases of oil spillage in marine environments.

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Toxicity of a mixture of monoaromatic hydrocarbons (BTX) to a tropical marine microcrustacean

Cited by 11 publications

References 52 publications

Models for BTEX evaluation in cases of oil spill on the sea, using Experimental Desing

Models for BTEX evaluation in cases of oil spill on the sea, using Experimental Desing

Magnetized vermiculite as a tool for the treatment of produced water generated by oil companies: Effects on aquatic organisms before and after treatment

Evaluation of Toxicity for Mysidopsis Juniae Species in Cases of Oil Spill in the Brazilian Potiguar Basin

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