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Identification of naturally weathering microplastics and their interactions with ion dyes in aquatic environments
Marine Pollution Bulletin ( IF 5.8 ) Pub Date : 2021-11-27 , DOI: 10.1016/j.marpolbul.2021.113186
Huixin Du 1 , Hongzhu Ma 1 , Baoshan Xing 2
Affiliation  

Here, naturally weathering plastics were collected and identified to understand the effect of the weathering conditions on their properties. The adsorption and desorption of crystal Violet (CV), a candidate of cationic organic pollutant, on microplastics (MPs) under various environmental conditions were simultaneously explored. The first type was the aged polyethylene (PE-MPs), which exhibited a fibrous structure with a smoother and uniform surface attached some flaps, while the second type was recognized as the aged polypropylene (PP-MPs), which showed a lamellar structure with less smooth and distorted texture surface attached with fragments and small grains. The experiment data fitted well with the pseudo-second-order kinetic and Freundlich isotherm models. The possible interactions between CV and MPs included electrostatic attraction, hydrogen bonding and hydrophobic interactions. This study demonstrates that the high possibility of transport ionic pollutants from fresh water to ocean by the naturally weathering microplastics, highlighting their potential risk in various environments.



中文翻译:

鉴定水生环境中自然风化的微塑料及其与离子染料的相互作用

在这里,收集并鉴定了自然风化塑料,以了解风化条件对其性能的影响。同时探索了阳离子有机污染物候选晶体紫(CV)在各种环境条件下对微塑料(MPs)的吸附和解吸。第一种是老化聚乙烯(PE-MPs),它呈现出一种纤维结构,表面更光滑、更均匀,附有一些皮瓣,而第二种被认为是老化聚丙烯(PP-MPs),它呈现出层状结构附着有碎片和小颗粒的不太光滑和扭曲的纹理表面。实验数据与准二级动力学和 Freundlich 等温线模型拟合良好。CV 和 MPs 之间可能的相互作用包括静电吸引、氢键和疏水相互作用。这项研究表明,通过自然风化的微塑料将离子污染物从淡水运输到海洋的可能性很高,突出了它们在各种环境中的潜在风险。

更新日期:2021-11-27
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