数字农科院2.0

The influence of humic and fulvic acids on polytetrafluoroethylene-adsorbed arsenic: a mechanistic study

文献类型： 外文期刊

作者： Dong, Youming;Gao, Minling;Qiu, Weiwen;Song, Zhengguo

作者机构：

关键词： Polytetrafluoroethylene; HA; pi complex; Hydrogen bond; Water pollution

期刊名称： ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

ISSN： 0944-1344

年卷期： 2021 年 28 卷 45 期

页码：

收录情况： JCR（2021版）

摘要： The large-scale use of polytetrafluoroethylene has resulted in ever-increasing amounts of polytetrafluoroethylene (PTFE) microplastic particles entering the environment. Given that the environment is polluted with arsenic (As(III)), and that the environment contains significant levels of humic acid (HA) and fulvic acid (FA), how PTFE and As(III) in water interacting in the presence of HA and FA needs to be urgently investigated. The results showed that As(III) was adsorbed by PTFE in the presence of HA and FA more markedly than the absence of them Adsorption equilibrium was reached at approximately 960 min and the adsorption isotherms were found to be best fitted by the Toth model. An increase in temperature was found to destroy hydrogen bonds, resulting in inhibited, non-spontaneous adsorption; a higher pH inhibited adsorption in the range 3-7. Computational and mechanistic studies revealed that PTFE formed pi complexes with HA units, which increased the number of oxygen-containing functional groups on its surface. The surface of the PTFE-HA pi complex was mostly negatively charged; however, the hydrogen atoms of the hydroxyl and carboxylic acid groups exhibited large positive potentials that enabled the adsorption of As(III). When the oxygen atom on As was close to the oxygen-containing functional group on PTFE-HA, the more electronegative oxygen atom forms a special intermolecular interaction in the form of O-H center dot center dot center dot O through the medium of hydrogen, which makes As adsorb on the surface of PTFE. Pore filling, hydrogen bonding, and covalent bonding are the main ways in which PTFE adsorbs As(III) in the presence of HA and FA. PTFE also adsorbed more As(III) in the presence of HA than in the presence of FA.

分类号：

  • 相关文献

[1]Adsorption Mechanism Of As(Iii) On P.olytetrafluoroethylene Particles Of Different S ize. Dong, Youming,Song, Zhengguo,Qiu, Weiwen,Gao, Minling. 2019

[2]A Framework For Assessing The E.ffects Of Afforestation And S outh-To-North Water Transfer On Nitrogen And Phosphorus Uptake By Plants In A Critical Riparian Zone. Zhao, HG, Huang, YC, You, SC, Wu, YF, Zheng, FX. 2019

[3]Fluorescence Characteristics Of Aqueous Synthesized T.in Oxide Quantum Dots F or The Detection Of Heavy Metal Ions In Contaminated Water. Liu, JQ, Zhang, QR, Xue, WT, Zhang, HP, Bai, Y, Wu, LT, Zhai, ZX, Jin, GH. 2019

[4]Strain-Specific Antagonism Of The Human H.1N1 Influenza A Virus A gainst Equine Tetherin. Wang, MY, Zhang, ZY, Wang, XJ. 2018

[5]Innate Sensing Of Influenza A V.irus Hemagglutinin Glycoproteins By T he Host Endoplasmic Reticulum (Er) Stress Pathway Triggers A Potent Antiviral Response Via Er-Associated Protein Degradation. Frabutt, DA, Bin Wang, B, Riaz, S, Schwartz, RC, Zheng, YH. 2018

[6]As(Iii) Adsorption Onto Different-Sized Polystyrene Microplastic Particles And Its Mechanism. Dong, YM, Gao, ML, Song, ZG, Qiu, WW. 2020

[7]Loop 3 Of Fungal Endoglucanases O.f Glycoside Hydrolase Family 1 2 Modulates Catalytic Efficiency. Yang, H, Shi, PJ, Liu, Y, Xia, W, Wang, XY, Cao, HF, Ma, R, Luo, HY, Bai, YG, Yao, B. 2017

[8]Efficient Conversion Of Fructose Into 5.-Ethoxymethylfurfural With Hydrogen Sulfate I onic Liquids As Co-Solvent And Catalyst. Guo, HX, Qi, XH, Hiraga, Y, Aida, TM, Smith, RL. 2017

[9]Enhancing the detection sensitivity of nanobody against aflatoxin B1 through structure-guided modification. He T., Nie Y., Yan T., Zhu J., He X., Li Y., Zhang Q., Tang X., Hu R., Yang Y., Liu M.. 2022

[10]Coptisine: A natural plant inhibitor of ruminal bacterial urease screened by molecular docking. He Y., Zhang X., Li M., Zheng N., Zhao S., Wang J.. 2022

[11]Design and synthesis of epigallocatechin (EGC) analogs selective to inhibit α-amylase over α-glucosidases via the incorporation of caffeine acid and its derivatives. Chen W., Zhou C., Chen J., Wang M., Zhou F., Wang C., Zhang X., Zhou W.. 2022

[12]The Transport Of Graphitic Carbon Nitride In Saturated Porous Media: Effect Of Hydrodynamic And Solution Chemistry. Jiang, YJ, Guan, D, Liu, YM, Yin, XQ, Zhou, S, Zhang, GL, Wang, N, Sun, HM. 2020

作者其他论文 更多>>