Phthalate esters (PAEs) are predominant additives in plastics, their widespread contamination in aquatic environments has raised global concern. Here, twelve plastic products were prepared as microplastics to investigate their release behaviors of PAEs. Six out of 15 PAEs were quantified after 14 days of incubation in water. The leaching potentials were plastic type-specific, where the pencil case (polyvinyl chloride, PVC) represented the highest migrations with total ∑₁₅ PAEs concentration of 6660 ± 513 ng/g, followed by the cleaning brush-1 (polyamide, PA, ~1830 ng/g) and rubber glove (1390 ± 57.5 ng/g). Conversely, the straw (polypropylene, PP), cleaning brush-2 (polyethylene terephthalate, PET) and shampoo bottle (PET) released the lowest amounts of PAEs, with 50.3 ± 8.21, 93.9 ± 91.8 and 104.35 ng/g, respectively. The release patterns of PAE congeners were polymer type-related, where di-n-butyl phthalate (DBP) dominated the leaching from PA, PP and PET microplastics (47–84%), diethyl phthalate leached the most from PVC and rubber microplastics (45–92%), while diisobutyl phthalate and DBP dominated the leaching from PE microplastics (68–94%). Water chemical properties could affect PAEs migration and the kinetic leaching process was well fitted with the pseudo-first-order model. Approximately 57.8–16,100 kg/year of PAEs were estimated to be released into oceans from microplastics.

邻苯二甲酸酯 (PAE) 是塑料中的主要添加剂，它们在水生环境中的广泛污染已引起全球关注。在这里，制备了 12 种塑料产品作为微塑料，以研究它们的 PAE 释放行为。在水中孵育 14 天后，对 15 个 PAE 中的 6 个进行了量化。浸出潜力因塑料类型而异，其中铅笔盒（聚氯乙烯，PVC）代表最高迁移量，总 ∑ ₁₅PAEs 浓度为 6660 ± 513 ng/g，其次是清洁刷 1（聚酰胺，PA，~1830 ng/g）和橡胶手套（1390 ± 57.5 ng/g）。相反，吸管（聚丙烯，PP）、清洁刷 2（聚对苯二甲酸乙二醇酯，PET）和洗发水瓶（PET）释放的 PAE 量最低，分别为 50.3 ± 8.21、93.9 ± 91.8 和 104.35 ng/g。PAE 同系物的释放模式与聚合物类型相关，其中 d- n邻苯二甲酸丁酯 (DBP) 主导 PA、PP 和 PET 微塑料的浸出 (47–84%)，邻苯二甲酸二乙酯从 PVC 和橡胶微塑料中浸出最多 (45–92%)，而邻苯二甲酸二异丁酯和 DBP 主导 PE 的浸出微塑料 (68–94%)。水的化学性质会影响PAEs的迁移，动力学浸出过程与伪一级模型拟合得很好。据估计，每年约有 57.8-16,100 公斤的 PAE 从微塑料中释放到海洋中。