Holes on surfaces of the weathered plastic fragments from coastal beaches

作者：Zheng, Yifan; Hamed, Mohamed; De-la-Torre, Gabriel Enrique; Frias, Joao; Jong, Mui-Choo; Kolandhasamy, Prabhu; Chavanich, Suchana; Su, Lei; Deng, Hua; Zhao, Wenjun; Shi, Huahong^*

来源：Marine Pollution Bulletin, 2023, 193: 115180.

DOI：10.1016/j.marpolbul.2023.115180

• Morphology
• Mesoplastics
• Weathering
• Deformation
• Degradation

The surface morphology of weathered plastics undergoes a variety of changes. In this study, 3950 plastic frag-ments from 26 beaches around the world, were assessed to identify holes. Holes were identified on 123 fragments on 20 beaches, with the highest frequency (10.3 %) being identified at Qesm AL Gomrok Beach in Egypt. The distribution of holes could be divided into even, single-sided, and random types. The external and internal holes were similar in size (37 & PLUSMN; 15 & mu;m) of even type fragments. The external holes were larger than the internal holes in single-sided (516 & PLUSMN; 259 & mu;m and 383 & PLUSMN; 161 & mu;m) and random (588 & PLUSMN; 262 & mu;m and 454 & PLUSMN; 210 & mu;m) fragment types. The external hole sizes were positively correlated with the internal hole sizes for each type. This study reports a novel deformation phenomenon on the surface of weathered plastics and highlights their potential effects on plastics.

• 单位
  清华大学