结合微塑料的多样性、破碎性和稳定性,追踪城市水体中微塑料的来源

IF 10.4 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Jinqiong Niu, Dongyu Xu, Wenqiang Wu, Bo Gao
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引用次数: 0

摘要

由于微塑料(MPs)具有复杂的可迁移特性,因此在各种环境介质中追踪其来源是目前面临的重大挑战。在本研究中,我们结合MP多样性和条件破碎模型,综合考虑局部多源性,对北京水体中的MP来源进行了全面识别。MP群落组成的相似性意味着河流和湖泊中存在共同或相似的来源,而基于MP的高度多样性,这些来源是分类和等效的。条件破碎模型可作为 MPs 破碎特征的代表。根据该模型,郊区污水、土壤、干湿沉积物构成了北京河湖中 MPs 的重要来源。郊区污水中 MPs 的丰度极高(52 万个-m-3),这也证实了郊区污水是 MPs 的一个潜在来源。对于不同聚合物类型和形态的 MPs,非纤维状聚丙烯(PP)主要受土壤控制,而污水污泥对纤维状聚对苯二甲酸乙二酯(PET)的贡献显著。我们的研究为更准确的来源分配提供了见解,并有助于更好地了解 MP 在城市环境中的归宿。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Tracing microplastic sources in urban water bodies combining their diversity, fragmentation and stability

Tracing microplastic sources in urban water bodies combining their diversity, fragmentation and stability
Tracing the sources of microplastics (MPs) across various environmental media is currently facing significant challenges due to their complex transportable features. In this study, we conducted a comprehensive identification of MP sources in Beijing water bodies by combining MP diversity and the conditional fragmentation model, thoroughly considering local multiple sources. The resemblance in MP community compositions implied shared or similar sources in rivers and lakes, and the sources were assorted and equivalent based on the high diversity of MPs. The conditional fragmentation model can act as a proxy of fragmentation characteristics of MPs. According to the model, suburban sewage, soils, and dry and wet deposition constituted significant sources of MPs in the rivers and lakes of Beijing. The extremely high abundance of MPs (520,000 items·m−3) in suburban sewage also confirmed it as a potential source. For MPs with different polymer types and morphologies, non-fibrous polypropylene (PP) was primarily controlled by soils, whereas the contribution of sewage sludge to fibrous polyethylene terephthalate (PET) was notable. Our study provides insights for more accurate source apportionment and contributes to a better understanding of MP fate in urban environment.
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来源期刊
npj Clean Water
npj Clean Water Environmental Science-Water Science and Technology
CiteScore
15.30
自引率
2.60%
发文量
61
审稿时长
5 weeks
期刊介绍: npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.
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