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You are here: Home » Online First » Volume 17, 2022 - Number 1 » TOXIC EFFECTS OF ESTER BASED POLYMERS ON DAPHNIA MAGNA: A LABORATORY MICROCOSM STUDY, Carpathian Journal of Earth and Environmental Sciences, February 2022, Vol. 17, No. 1, p. 35 – 47; DOI:10.26471/cjees/2022/017/198


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Vildan Zülal SÖNMEZ1, Nevra ERCAN2 & Nüket SİVRİ1,*
1 Istanbul University-Cerrahpasa, Department of Environmental Engineering, 34320, Avcılar, Istanbul, Turkey., zulal.sonmez@iuc.edu.tr ; nuket@iuc.edu.tr *Corresponding author: nuket@iuc.edu.tr
2 Istanbul University-Cerrahpasa, Department of Chemical Engineering, 34320, Avcılar, Istanbul, Turkey.
nevra.ercan@iuc.edu.tr


TOXIC EFFECTS OF ESTER BASED POLYMERS ON DAPHNIA MAGNA: A LABORATORY MICROCOSM STUDY, Carpathian Journal of Earth and Environmental Sciences, February 2022, Vol. 17, No. 1, p. 35 – 47; DOI:10.26471/cjees/2022/017/198

Full text

Abstract:

This study aims to determine toxic effects of polyester-based polymers (polycarbonate (PC), polyethylene terephthalate (PET) and, polybutylene terephthalate (PBT)) depending on physiological change in life cycle of Daphnia magna Straus (1820) (Cladocera, Crustacea). As a result of acute toxicity test, it was observed that although the rates of immobilized/dead organisms were low, damage started occurring in organisms. According to the results of 72th, the median effective concentration (EC50) values of PC, PET and PBT were determined as 2.604 mg L-1, 4.694 mg L-1 and >100 mg L-1, respectively. In consequence of chronic toxicity test, in the experiment set in which the water where daphnids were cultivated was used, it was observed that there was a high rate of deformation on daphnids which were exposed to ester-based polymers. The possible effect of polyester-based polymers on the daphnids deformation might be consequence of reaction between urea and ester groups of PC, PET, and PBT. Especially in the sets where microalgae existed and the natural conditions were simulated, it was determined that the toxicity response of daphnids varied in accordance with different microplastic types in terms of their chemical structure.



Keyword: Microplastics; ester-based polymer; acute toxicity; chronic toxicity; Daphnia magna.


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