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Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics
Wu, Jie1,2,3; Lu, Jian1,2,3,5; Wu, Jun4
KeywordMicroplastics Gastric fluid Endocrine-disrupting chemicals Adsorption Desorption
Corresponding AuthorLu, Jian(jlu@yic.ac.cn)
AbstractMicroplastics 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 17 beta-estradiol (E2) and 17 alpha-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 mu g/g) increased by 2.51 times in comparison with that in saline solution (2.22-7.81/2.87-10.80 mu g/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 degrees C and 38 degrees 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. (C) Higher Education Press 2022
Funding OrganizationNational Natural Science Foundation of China ; Taishan Scholar Program of Shandong Province ; Science and Technology Service Network Initiative of the Chinese Academy of Sciences ; Two-Hundred Talents Plan of Yantai ; Wanhua Chemical Group Co. Ltd.
Indexed BySCI
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS IDWOS:000733897900002
Citation statistics
Document Type期刊论文
Corresponding AuthorLu, Jian
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
2.YICCAS, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Wu, Jie,Lu, Jian,Wu, Jun. Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2022,16(8):13.
APA Wu, Jie,Lu, Jian,&Wu, Jun.(2022).Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,16(8),13.
MLA Wu, Jie,et al."Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 16.8(2022):13.
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