Ecotoxicity assessment data of n-butyl acrylate to aquatic organisms?

Ecotoxicity assessment data

With the rapid development of industrialization and the chemical industry, the impact of the production and use of chemicals on the environment has received increasing attention. As an important chemical raw material, n-butyl acrylate is widely used in coatings, plastics, adhesives and other fields. Its ecological toxicity in aquatic ecosystems has gradually become the focus of research. In this paper, the physical and chemical properties of n-butyl acrylate, acute and chronic toxic effects on aquatic organisms and ecological risk assessment were analyzed in detail.

1. The basic characteristics of n-butyl acrylate

n-Butyl acrylate is a colorless liquid with a faint odor. Its chemical formula is C₂ H₂ O₂ and its molecular weight is 130.15. n-Butyl acrylate has good solubility at room temperature and is miscible with water, which makes it easy to diffuse and migrate in the aquatic environment. The volatility of n-butyl acrylate is low, but it may decompose under the action of external factors such as light and heat to generate other substances.

2. Acute toxic effects

Acute toxicity refers to the ability of a chemical substance to produce a toxic effect on an organism in a short period of time. It was found that n-butyl acrylate has some acute toxicity to aquatic organisms. For example, in the Daphnia (Daphnia magna) acute toxicity test, the LC of n-butyl acrylate (LD50) is about 0.5 mg/L. This means that at a concentration of 0.5 mg/L, half of the Daphnia individuals may die. Similar studies have also shown that n-butyl acrylate has similar toxic effects on water flea (Ceriodaphnia dubia) and rotifers (Brachycyclopsantarcticus).

3. Chronic toxic effects

In addition to the acute toxicity, the chronic toxicity of n-butyl acrylate to aquatic organisms can not be ignored. Chronic toxicity is usually manifested by the inhibition of growth, reproduction and behavior of organisms under long-term low-concentration exposure. For example, the growth inhibition effect of n-butyl acrylate on green algae (Scenedesmus obliquus) showed that when the concentration was 0.1 mg/L, the biomass of green algae would be significantly reduced. Butyl acrylate may also interfere with the endocrine system of aquatic organisms and affect their reproductive ability.

4. Impact on different aquatic organisms

There were significant differences in the sensitivity of different aquatic organisms to n-butyl acrylate. For example, fish are relatively less toxic to n-butyl acrylate, while invertebrates such as daphnia and rotifers are more sensitive. This difference may be related to the physiological structure of the organism, metabolic capacity and the way of ingestion of chemicals. Therefore, in the ecotoxicity assessment, the sensitivity of different organisms needs to be comprehensively considered to fully evaluate the potential impact of n-butyl acrylate on aquatic ecosystems.

5. Main factors affecting ecotoxicity assessment

The ecotoxicity assessment of n-butyl acrylate is influenced by several factors. The solubility of n-butyl acrylate in water is a key factor. Due to the high solubility of n-butyl acrylate, its concentration in water may rapidly reach toxic levels. The type and life stage of aquatic organisms also affect the manifestation of toxic effects. For example, larvae of Daphnia are more sensitive to n-butyl acrylate, while adults are relatively tolerant. Environmental conditions such as temperature, pH and light intensity also affect the toxicity and biological response of n-butyl acrylate.

6. Ecological risk assessment and management recommendations

Based on the current research data, the ecological toxicity effect of butyl acrylate on aquatic organisms is mainly concentrated in the key species such as daphnia, rotifers and algae. In order to reduce its ecological risk, it is recommended to take the following measures: strengthen the environmental risk management during the production, storage and use of n-butyl acrylate to reduce its discharge to water bodies; formulate strict water quality standards to limit the concentration of n-butyl acrylate in water bodies; Carry out long-term monitoring and ecological restoration research to assess its long-term impact on aquatic ecosystems.

Conclusion

As a widely used chemical product, the ecological toxicity of n-butyl acrylate to aquatic organisms needs to be paid more attention. Through systematic ecotoxicity assessment and risk management, the potential threat to aquatic ecosystems can be effectively reduced, which provides a scientific basis for environmental protection and sustainable development.