The impact of large microplastics on the physical behavior of soils: implications to marine sediments

IF 5.6 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Acta Geotechnica Pub Date : 2024-04-22 DOI:10.1007/s11440-024-02336-6
Emelyne Routier, Marie Guenther, Marco Terzariol
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Abstract

Marine plastic pollution has become a major concern as it threatens marine life and human health. Most of the plastic that enters the ocean is either consumed by animals and/or trapped in sediments. However, there is little information on how sediment properties might be affected. In this article, we explore the impact of microplastic inclusions in marine settings by using PVC plastic chips and two soil samples as analogues. We conducted a comprehensive experimental study to investigate changes in compressibility, strength, stiffness, thermal and hydraulic conductivity, and particle migration by varying plastic content. Results show that as low as 1% of plastic content by volume can lead to irreversible consequences in sediment behavior while coarse particles display a heightened sensitivity than pure fines. As plastic content in sediment increases year-by-year, we anticipate significant repercussions in marine life, the future landscape of the seafloor and subsurface phenomena.

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大型微塑料对土壤物理行为的影响:对海洋沉积物的影响
海洋塑料污染威胁着海洋生物和人类健康,已成为人们关注的主要问题。进入海洋的大部分塑料要么被动物吃掉,要么被困在沉积物中。然而,关于沉积物特性可能受到何种影响的信息却很少。在本文中,我们以 PVC 塑料碎片和两种土壤样本为类似物,探讨了海洋环境中微塑料夹杂物的影响。我们进行了一项全面的实验研究,调查了不同塑料含量对可压缩性、强度、刚度、导热性、导水性和颗粒迁移的影响。结果表明,塑料含量只要达到体积的 1%,就会对沉积物的行为产生不可逆转的影响,而粗颗粒的敏感性要高于纯细粒。随着沉积物中塑料含量的逐年增加,我们预计将对海洋生物、海底未来景观和地下现象产生重大影响。
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来源期刊
Acta Geotechnica
Acta Geotechnica ENGINEERING, GEOLOGICAL-
CiteScore
9.90
自引率
17.50%
发文量
297
审稿时长
4 months
期刊介绍: Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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