TOXIC EFFECTS OF ESTER BASED POLYMERS ON DAPHNIA MAGNA: A LABORATORY MICROCOSM STUDY

IF 0.9 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Carpathian Journal of Earth and Environmental Sciences Pub Date : 2022-02-01 DOI:10.26471/cjees/2022/017/198
V. Sönmez, Nevra Ercan, N. Sivri
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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.
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酯基聚合物对水蚤的毒性作用:实验室微观研究
本研究旨在确定聚酯基聚合物(聚碳酸酯(PC),聚对苯二甲酸乙二醇酯(PET)和聚对苯二甲酸丁二酯(PBT))对水蚤(1820)生命周期生理变化的毒性作用。急性毒性试验结果显示,虽然固定化/死亡生物的比例较低,但生物体内开始出现损伤。根据72日的结果,测定PC、PET和PBT的中位有效浓度(EC50)值分别为2.604 mg L-1、4.694 mg L-1和>100 mg L-1。通过慢性毒性试验,在使用水蚤养殖水的实验设置中,观察到水蚤暴露于酯基聚合物的变形率很高。聚酯基聚合物对水蚤变形的影响可能是尿素与PC、PET和PBT的酯基反应的结果。特别是在微藻存在的环境和模拟自然条件下,确定了水蚤对不同微塑料类型的毒性反应在化学结构上是不同的。
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来源期刊
CiteScore
2.30
自引率
25.00%
发文量
42
审稿时长
12-24 weeks
期刊介绍: The publishing of CARPATHIAN JOURNAL of EARTH and ENVIRONMENTAL SCIENCES has started in 2006. The regularity of this magazine is biannual. The magazine will publish scientific works, in international purposes, in different areas of research, such as : geology, geography, environmental sciences, the environmental pollution and protection, environmental chemistry and physic, environmental biodegradation, climatic exchanges, fighting against natural disasters, protected areas, soil degradation, water quality, water supplies, sustainable development.
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