cqvip:The large plastic produced by human production and life is degraded into micro-plastics in the environment. Micro-plasticsare harmful to organisms and the environment. In order to determine the hazards of micro-plastic pollution,zebrafish embryos were used as the tested organism,and 0. 6-1. 0 μm polystyrene micro-plastic was used to carry out embryo exposure experiment. The toxic effects of polystyrene plastic particles on zebrafish embryos were investigated comprehensively,and the toxicity was evaluated. The results of this study showed that 0. 6-1. 0 μm polystyrene micro-plastic had certain toxicity on zebrafish embryos,and it had a lethal effect when the concentration reached 250 mg/L; 25 mg/L 0. 6-1. 0 μm polystyrene particles can cause cyrtosis and pericardial edema of zebrafish embryos and other non-lethal toxic effects; and 250 and 1 000 mg/L exposure concentration can slow down heart rate. A hazard evaluation index system of polystyrene particles to zebrafish embryos was established,and it is determined that the exposure to 250 mg/L or lower concentration of polystyrene particles has slight hazard.
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