| Autor: |
Papac Zjačić, Josipa, Kovačić, Marin, Kušić, Hrvoje, Hrnjak Murgić, Zlata, Dionysiou, D. Dionysios, Lončarić Božić, Ana |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
Sources of microplastic (MP) in the environment are various including inefficient wastewater treatment plants, and stormwater runoff. Also, everyday activities that produce municipal plastic waste due to unregulated waste management end up in the aquatic environment which with time can be degraded and fragmented into MP particles. Due to its shape and size, MP can easily enter the food chain and cause negative effects on the organisms. Also, it is important to notice that in atmospheric conditions waste polymer material as well as MP can release additives that are mostly residue from the synthesis or even can be produced in the process of recycling. The aim of this study was to investigate the qualitative content and aquatic toxicity of samples during the leaching process. For that purpose pristine and photooxidative (UV) aged polyethylene terephthalate (PET) bottles were exposed to the enhanced atmospheric conditions. In leaching tests, using pristine and aged MP, the concentration of bisphenol A (BPA) in the aqueous phase was monitored using High-Performance Liquid Chromatography Analysis. Heavy metal concentration was monitored using Inductively Coupled Plasma Mass Spectrometry. Acute toxicity bioassays were performed with the freshwater microalgae Pseudokirchneriella subcapitata (Selenastrum capricornutum) and the crustacean Daphnia magna as well as marine bioluminiscent bacteria Vibrio fischeri, according to standard procedures (ISO). Obtained results indicate that the fragmentation of PET bottles is enhanced for pristine PET bottles in terms of a higher percentage of smaller particles. Leachates that are released from both pristine and aged PET samples were BPA and antimony. The release of antimony was much lower from the UV-aged sample. In general, presence of leached constituents enhances overall toxicity effects in comparison with the samples that consisted of only MP particles. These results will serve as preliminary study for the further investigation of microplastic behaviour in the aquatic environment and the goal is to step forward to the more complex environmentally relevant samples which are considered as a mixture of microplastics and other pollutants. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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