论文标题：Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics（胃液对微塑料上干扰内分泌的化学物质的吸附和解吸的影响）

期刊：Frontiers of Environmental Science & Engineering

作者：Jie Wu, Jian Lu, Jun Wu

发表时间：15 Aug 2022

DOI： 10.1007/s11783-022-1525-8

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原文链接（点击“阅读原文”直接获取）

https://journal.hep.com.cn/fese/EN/10.1007/s1178-022-1525-8

文章出版：Front. Environ. Sci. Eng. 2022, 16(8): 104

原文信息

题目：

Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

作者：

Jie Wu^1,2, Jian Lu ()^1,2,4, Jun Wu³

作者单位：

1 CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, China

2 University of Chinese Academy of Sciences, China

3 Yantai Research Institute, Harbin Engineering University, China

4 Center for Ocean Mega-Science, Chinese Academy of Sciences, China

通讯作者邮箱：

jlu@yic.ac.cn

关键词：

Microplastics (微塑料);

Gastric fluid (胃液);

Endocrine-disrupting chemicals (内分泌干扰化学物质);

Adsorption (吸附);

Desorption (解吸)

文章亮点

•评估了胃液对EDCs吸附-解吸到微塑料上的影响；

•胃液增强了微塑料表面EDCs的解吸；

•吸附和解吸等温线与Freundlich模型吻合良好；

•在PVC上EE2的解吸率（55%-59%）大于E2的解吸率（49%-55%）；

•胃液中pH值的降低和离子强度的增加会加强解吸作用。

文章简介

本文研究了胃液对微塑料上17β-雌二醇（E2）和17α-乙苯雌二醇（EE2）吸附和解吸的影响。E2/EE2在微塑料上的吸附和解吸可以很好地拟合Freundlich模型。在PVC上EE2的解吸率（55%~59%）大于E2的解吸率（49%~55%），表明EE2在胃液中的稳定性较差，这可以通过EE2的疏水性大于E2来解释。E2/EE2在胃液中更容易从PVC中解吸，与盐水溶液相比，解吸量（5.25~12.91/7.19~17.86 μg/g）增加了2.51倍（2.22~7.81/2.87~10.80 μg/g）。此外，胃液中pH值的降低和离子强度的增加可以进一步增强PVC中E2/EE2的解吸。通过降低PVC表面的疏水性，实现了胃液对PVC解吸的促进作用。E2/EE2在18°C和38°C时的解吸率分别为44%~47%/46%~50%和49%~55%/56%~59%，表明负载E2/EE2的PVC在恒温海洋生物的胃液中释放污染物的风险相对较大，而温度越高，变温动物的危害也越大。微塑料和污染物之间的相互作用可能主要是疏水相互作用。本研究阐明了微塑料对污染物（E2和EE2）的吸附和解吸能力，为污染物对微塑料的吸附和解吸行为以及微塑料在污染物迁移中的作用提供新的见解。

文章摘要图

编委点评

海洋中微塑料等新兴污染物的污染引起了广泛关注，污染物对微塑料的吸附和解吸已得到广泛研究。然而，很少有人关注胃液中微塑料中内分泌干扰化学物质的解吸和释放。本研究通过实验室实验来探索E2和EE2在模拟胃液存在的情况下在微塑料上的吸附和解吸。评估了模拟胃液中微塑料E2/EE2的解吸程度，并与盐水条件下的解吸程度进行了比较。同时，利用不同pH和离子强度条件的模拟胃液环境来研究解吸效果。本研究阐明了微塑料对污染物（E2和EE2）吸附和解吸的能力。这些发现对于评估微塑料和内分泌干扰化学物质的环境风险具有重要意义。

编者 | 曹曼曼

点评 | 王飞

致 谢

王飞，北京师范大学教授，FESE青年编委。研究方向为污染物的环境行为及生物学效应、纳米材料在土壤修复中的应用、催化氧化技术，主持国家优秀青年基金等项目，以第一/通讯作者在Environmental Science & Technology、Geochimica et Cosmochimica Acta、Journal of Hazardous Materials等国际环境领域主流期刊上发表论文70余篇。个人主页：

http://envfaculty.bnu.edu.cn/Public/htm/news/5/132.html

曹曼曼，女，22岁，北京科技大学能源与环境工程学院2020级环境科学与工程硕士生，导师为王飞教授，研究方向为污染物的环境行为及生物学效应。

摘要

Microplastics and endocrine disrupting chemicals are emerging pollutants in the marine environment because of their potential hazards. The effect of gastric fluid on the adsorption and desorption of 17β-estradiol (E2) and 17α-ethynylestradiol (EE2) to microplastics was investigated. The adsorption and desorption isotherms of E2/EE2 on microplastics could be well fitted by the Freundlich model while the Gibbs free energy of these processes were negative, proving that the reaction occurred spontaneously on the heterogeneous surface of the microplastics. Desorption ratios of EE2 (55%–59%) on PVC were larger than that of E2 (49%–55%) to indicate that EE2 was less stable in gastric fluid, which could be explained by the fact that the hydrophobicity of EE2 was greater than E2. E2/EE2 were more easily desorbed from PVC in the gastric fluid and the desorption amount (5.25–12.91/7.19–17.86 μg/g) increased by 2.51 times in comparison with that in saline solution (2.22–7.81/2.87–10.80 μg/g). The decrease of pH and the increase of ionic strength in gastric fluid could further strengthen desorption of E2/EE2 from PVC. The promotion of gastric juice on desorption of PVC was achieved by reducing the hydrophobicity of the PVC surface. The desorption rate of E2/EE2 at 18°C and 38°C was respectively 44%–47%/46%–50% and 49%–55%/56%–59%, indicating that PVC loaded with E2/EE2 had a relatively greater risk of releasing pollutants in the gastric fluid of constant temperature marine organisms while higher temperatures exposed higher hazards for variable temperature animals. The interaction between microplastics and pollutants might be mainly hydrophobic interaction.

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