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Assessing aquatic toxicity of leachates from shoe sole fragments
Lia Kim(김리아),Dokyung Kim(김도경),Sang A Kim(김상아),Haemi Kim(김해미),Tae-Yang Lee(이태양),Youn-Joo An(안윤주) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
Microplastics generated from the land contribute a high portion of plastic waste, such as shoe sole fragments or tire wear. These particles could be exposed to aquatic environments in all days and leaching some chemicals such as additives, used in the product manufacturing process. This study investigated the toxicity of shoe sole fragments on three aquatic organisms (Chlamydomonas reinhardtii, Daphnia magna, and Danio rerio) using their leachates. The adverse effects on each test species were measured and chemical component analysis in each leachate were conducted. The results of toxicity effects and chemical component were compared and the most relevant chemical were determined using the principal component analysis. In results, the aquatic toxicity was highly related to the chemicals such as benzothiazole, carbon disulfide, and p-xylene, which were detected only in sneakers leachates. These results indicate that the road-originated microplastics could leach some toxic chemicals when exposed to aquatic media, inducing the significant adverse effects on the aquatic organisms. The small-size plastic discharge have a risk of their chemical-leaching property that it would be essential to regulate the chemicals in plastic-production process to prevent from the severity of microplastic toxicity.