Effects of Nano- and Microplastic Particles (NMPs) on the Transport of PFOA in Natural Sediment

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-10-04 DOI:10.1007/s11270-025-08616-5

Wenyi Xie, Jingrui Wang, Zhen Song, Yun Chen, Xueyan Lyu

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引用次数: 0

Abstract

Per- and polyfluoroalkyl substances (PFAS) ubiquitously coexisted with nano- and microplastic particles (NMPs) in natural sediment. The divergent physiochemical characteristics of nanoplastics (NPs) and microplastics (MPs) may differentially modulate PFOA transport and associated environmental risks by serving as distinct vectors, yet, the magnitude and mechanisms of these effects remain poorly elucidated. Here, column experiments were conducted to investigate the impacts of polystyrene (PS) NPs (0.1 μm) and MPs (5 μm) on the transport of perfluorooctanoic acid (PFOA) in saturated natural sediment under two pH conditions (4.7 and 6.0). Results showed the individual transport of PS NMPs and the adsorption affinity of PFOA to these particles collectively governed the overall impact on PFOA transport in sediment. Smaller PSNPs had an insignificant influence on PFOA mobility under both pH conditions, yielding effluent recoveries > 90.55 ± 2.20% versus 91.92 ± 1.00% ~ 93.97 ± 0.48% in a single-solute system. This was likely due to the high mobility capacity of both PSNPs and potential PSNPs-PFOA complex in the sediment. In contrast, despite the majority of PFOA remaining unbound to the PSMPs surface (> 91.13%), larger sized PSMPs can act as a vehicle to slightly enhance the retention of PFOA due to its high retention in sediment across both pH conditions. This study underscored the necessity of distinguishing between NPs and MPs when evaluating PFOA transport risks in natural sediment environments.

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纳米和微塑料颗粒（NMPs）对天然沉积物中PFOA迁移的影响

全氟和多氟烷基物质（PFAS）与纳米和微塑料颗粒（nmp）在自然沉积物中普遍共存。纳米塑料（NPs）和微塑料（MPs）不同的物理化学特性可能通过作为不同的载体来不同地调节PFOA的运输和相关的环境风险，然而，这些影响的大小和机制尚不清楚。采用柱状实验研究了聚苯乙烯（PS） NPs （0.1 μm）和MPs （5 μm）对饱和天然沉积物中全氟辛酸（PFOA）输运的影响。结果表明，PFOA在沉积物中运移的总体影响因素是PFOA在PS NMPs中的单个迁移和PFOA对这些颗粒的吸附亲和力。在两种pH条件下，较小的PSNPs对PFOA迁移率的影响不显著，出水回收率为90.55±2.20%，而在单溶质体系中为91.92±1.00% ~ 93.97±0.48%。这可能是由于psnp和潜在的psnp - pfoa复合物在沉积物中的高迁移能力。相比之下，尽管大部分PFOA仍未与PSMPs表面结合（91.13%），但由于PSMPs在两种pH条件下在沉积物中的高保留率，较大尺寸的PSMPs可以作为载体略微增强PFOA的保留率。该研究强调了在评估PFOA在自然沉积物环境中的迁移风险时区分NPs和MPs的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.