High accumulation of microplastic fibers in fish hindgut induces an enhancement of triphenyl phosphate hydroxylation
文献类型： 外文期刊
作者： Chen, Qiqing 1 ; Gao, Zhuo 1 ; Wang, Kang 2 ; Magnuson, Jason T. 3 ; Chen, Yuye 1 ; Li, Mingyuan 1 ; Shi, Huahong 1 ; Xu, Li 2 ;
作者机构： 1.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100097, Peoples R China
3.Univ Stavanger, Dept Chem Biosci & Environm Engn, N-4021 Stavanger, Norway
关键词： Microplastic; Microfiber; Triphenyl phosphate; Hydroxylation; Fish gut
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.9； 五年影响因子：9.5 ）
ISSN： 0269-7491
年卷期： 2023 年 317 卷
页码：
收录情况： SCI
摘要： Fiber shedding from artificial textiles is among the primary sources of pervasive microplastics in various aquatic habitats. To avoid molten drop burning, triphenyl phosphate (TPhP), a typical flame retardant additive, is commonly incorporated into textile fibers. However, the role of microplastic fibers (MFs) as a vehicle for TPhP remains largely unknown. In this study, we investigated the effects of MFs on the bioaccumulation and metabolism of TPhP in zebrafish. We applied the compound spinning technique for a non-disruptive in situ measurement of fluorescent MFs in fish, and the desorption electrospray ionization mass spectrometry (DESI-MS) to display the tissue distribution of TPhP and its metabolites vividly. Laboratory results showed that ingested MFs did not change the TPhP distribution in fish; however, they statistically increased the metabolite p-OH-TPhP concentration in the fish hindgut, which was probably because the high accumulation of MFs there enhanced the TPhP hydroxylation. Field investigation further supported the lab-based analyses. Higher concentrations of MFs did cause a higher ratio of [p-OH-TPhP]/[TPhP] in the wild fish gut, particularly in the hindgut. Collectively, our results demonstrated that MFs can change the distribution and bioavailability of TPhP metabolites, which was confirmed by both laboratory and fieldwork. Therefore, the ingestion of MFs can indirectly but substantially influence the bioaccumulation and biotransformation of co-existing pollutants.
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