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

作     者：Jie Wu Jian Lu Jun Wu Jie Wu;Jian Lu;Jun Wu

作者机构：CAS Key Laboratory of Coastal Environmental Processes and Ecological RemediationYantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai 264003China University of Chinese Academy of SciencesBeijing 100049China Yantai Research InstituteHarbin Engineering UniversityYantai 264006China Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2022年第16卷第8期

页      面：193-205页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 0907[农学-林学] 07[理学] 1001[医学-基础医学(可授医学、理学学位)] 0837[工学-安全科学与工程] 0703[理学-化学] 0713[理学-生态学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.41877131 and 41671319) the Taishan Scholar Program of Shandong Province(No.tsqn201812116) the Science and Technology Service Network Initiative of the Chinese Academy of Sciences(No.KFJ-STS-QYZX-114) the Two-Hundred Talents Plan of Yantai(No.Y739011021) the Wanhua Chemical Group Co.Ltd. 

主　　题：Microplastics Gastric fluid Endocrine-disrupting chemicals Adsorption Desorption 

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(5.25–12.91/7.19–17.86μg/g)increased by 2.51 times in comparison with that in saline solution(2.22–7.81/2.87–10.80μg/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.