Determination of the Toxic Potential of the Formation of Oil-Suspended Particulate Matter Aggregates (OSA) in a Simulated Microscale Experiment
The aggregation of suspended particulate matter (SPM) and oil droplets in environments with specific hydrodynamic energy can lead to the formation of Oil-SPM Aggregates (OSA). A laboratory simulation was conducted in order to examine the possible toxic potential of OSA formation using three differen...
Published in: | Anuário do Instituto de Geociências |
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Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Universidade Federal do Rio de Janeiro
2021
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Subjects: | |
Online Access: | https://revistas.ufrj.br/index.php/aigeo/article/view/35441 https://doi.org/10.11137/1982-3908_2021_44_35441 |
Summary: | The aggregation of suspended particulate matter (SPM) and oil droplets in environments with specific hydrodynamic energy can lead to the formation of Oil-SPM Aggregates (OSA). A laboratory simulation was conducted in order to examine the possible toxic potential of OSA formation using three different concentrations of particulate material (50, 200, 300 mg/L) in a microscale experiment. The procedure was performed through toxicological testing of acute exposure to determine the LC50 (lethal concentration 50%) using the microcrustacean Artemia salina as a test organism. Serial dilutions were made from surface and bottom samples in order to characterize different toxicity. The concentration that showed the highest potential toxicity was 200 mg/L, having the same values for surface and bottom (LC50 7.91%), whereas the concentration with the least toxic potential was 300 mg/L (LC50 31.5%) for surface samples. Negative correlation was found between redox potential and the hydrogenionic potential (only for samples with 200 mg/L of sediment), and positive correlation was found between toxicity factors (percent dilution and mortality) and the other monitored parameters. |
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