微塑料
水柱
爆裂
扩散
海水
大气(单位)
化学工程
相(物质)
环境科学
化学
海洋学
环境化学
气象学
地质学
热力学
有机化学
物理
工程类
神经科学
生物
作者
Ruei-Feng Shiu,Lu-Yi Chen,Hui-Ju Lee,Gwo‐Ching Gong,Chuping Lee
出处
期刊:Water Research
[Elsevier BV]
日期:2022-07-12
卷期号:222: 118856-118856
被引量:42
标识
DOI:10.1016/j.watres.2022.118856
摘要
The pervasiveness of microplastics (MPs) in global oceans is raising concerns about their adverse impacts on ecosystems. The mechanistic understanding of MP transport is critical for evaluating its fate, flux, and ecological risks specifically. Currently, bubble bursting is believed to represent an important route for MP transfer from sea surfaces to the atmosphere. However, the detailed mechanisms of the complex physico-chemical interactions between MPs, water composition, and gel particles in the air–sea interface remain unknown. Our results suggested three steps for MP transfer between air–sea phases: (1) MPs incorporating into gel aggregates in the water column; (2) further accumulation of plastic-gel aggregate in the surface layer phase; finally (3) ejection of aggregates from the sea when bubbles of trapped air rise to the surface and burst. The water composition (e.g., high salinity, gel concentration and viscosity) can modulate plastic-gel aggregation and subsequent transport from water to the atmosphere. The possible mechanism may be closely tied to the formation of plastic-gel via cation-linking bridges, thereby enhancing plastic-gel ejection into air. Collectively, this work offers unique insights into the role of marine plastic-gels in determining MP fate and transport, especially at air–sea interfaces. The data also provide a better understanding of the corresponding mechanism that may explain the fates of missing plastics in the ocean.
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