Abstract:
Microplastic (MP) contamination is in the spotlight today, yet knowledge of their interaction with other organic contaminants in the soil environment is limited. Concerns extend to endocrine disrupting chemicals (EDCs), known for their potential to interfere with the hormonal systems of organisms and for their persistence and widespread presence in the environment. In this study, the most frequently occurring EDCs were monitored both in alluvial soil and in soil contaminated with different MPs commonly found in soil media, polyethylene, polyamide, and polystyrene. Bisphenol A and parabens were the most rapidly dissipating compounds, followed by triclosan and triclocarban, with the latter showing poor degradation. Per- and polyfluoroalkyl substances (PFAS) showed high persistence as concentrations remained nearly constant throughout the experiment. Although they fitted well with first-order dissipation kinetics, most showed biphasic behavior. The co-occurrence of MPs in the soil influenced the kinetic behavior in most cases although the differences were not very marked. MPs could impact sorption-desorption processes, affecting contaminant mobility and bioavailability to organisms in soil. These findings strengthen evidence for the influence of MPs on the behavior of soil contaminants such as EDCs, not only as vectors or sources of contaminants but by affecting dissipation kinetics.
摘要:
微塑料(MP)污染是在今天的聚光灯下,然而,关于它们与土壤环境中其他有机污染物相互作用的知识是有限的。关注扩展到内分泌干扰化学物质(EDCs),众所周知,它们可能会干扰生物体的激素系统,并因其持久性和在环境中的广泛存在而闻名。在这项研究中,在冲积土壤和土壤介质中常见的不同MPs污染的土壤中监测最常见的EDC,聚乙烯,聚酰胺,和聚苯乙烯。双酚A和对羟基苯甲酸酯是消散最快的化合物,其次是三氯生和三氯卡班,后者表现出较差的退化。全氟烷基和多氟烷基物质(PFAS)显示出高持久性,因为在整个实验过程中浓度几乎保持恒定。尽管它们符合一阶耗散动力学,大多数表现出双相行为。尽管差异不是很明显,但大多数情况下,土壤中MPs的同时出现会影响动力学行为。MPs可能会影响吸附-解吸过程,影响污染物对土壤中生物的流动性和生物利用度。这些发现加强了MPs对土壤污染物如EDC行为的影响的证据。不仅作为污染物的载体或来源,而且通过影响耗散动力学。