The present study tested under laboratorial conditions the sorption of okadaic acid (OA), a lipophilic toxin produced by marine phytoplankton, onto 6-mm plastic circular fragments. Fragments (4 g L⁻¹) of polyethylene terephthalate (PET), polypropylene (PP), expanded polystyrene (EPS) and non-expanded polystyrene (PS) were exposed for 96 h to seawater spiked with 10 ng mL⁻¹ of OA. Results of the experiments showed a broad percentage of OA removed from the water by plastics after 48 h of exposure: 30 ± 5.1% (PET), 37 ± 9.5% (PP), 62 ± 7.1% (EPS) and 83 ± 1.9% (PS). Sorption appears to be highly influenced by polymer's characteristics, such as polarity and degree of crystallinity. Further studies are needed to clarify the effect of the contact area on sorption by expanded plastics. These results point to the plausible interaction of OA and plastics in coastal waters.

本研究在实验室条件下测试了冈田酸（OA）（海洋浮游植物产生的亲脂性毒素）在6毫米塑料圆形碎片上的吸附。将聚对苯二甲酸乙二醇酯（PET），聚丙烯（PP），膨胀聚苯乙烯（EPS）和非膨胀聚苯乙烯（PS）的碎片（4 g L ^-1）暴露于掺有10 ng mL ^-1的海水中96小时。OA。实验结果表明，暴露48小时后，通过塑料从水中去除的OA占很大比例：30±5.1％（PET），37±9.5％（PP），62±7.1％（EPS）和83±1.9％ （PS）。吸附似乎受到聚合物特性（例如极性和结晶度）的高度影响。需要进一步的研究来阐明接触面积对发泡塑料吸附的影响。这些结果表明，OA和塑料在沿海水域之间可能存在相互作用。