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Ruichao Xie Dissertation_07Jul2023.pdf (6.08 MB)

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Development of Mixed Retention Mode Adsorbents for Perfluorooctanoic Acid and Tin Oxide Electrochemical Sensor for On-line Ethanol Determination

Xie, Ruichao
http://orcid.org/0009-0005-3106-0932
http://rave.ohiolink.edu/etdc/view?acc_num=miami1688688181131944

Abstract Details

2023, Doctor of Philosophy, Miami University, Chemistry and Biochemistry.
This dissertation consists of three research chapters. The first two are environmental studies, which focus on developing modified adsorbents for the removal of perfluorooctanoic acid (PFOA), a persistent and toxic pollutant in surface water. The adsorbents were synthesized using a weak anion exchange resin or activated carbon, respectively, as the base material before modification with a fluoropolymer and then polyethyleneimine through an amine crosslinking reaction. The adsorption of PFOA on the modified adsorbents was evaluated using fixed-bed tests, and their mixed mode hydrophobic and anion exchange adsorption mechanisms were elucidated. Compared with the unmodified base materials, the results showed that the modified adsorbents were effective at removing PFOA from water and could be easily regenerated. The third research chapter focuses on developing new detection techniques for volatile organic compounds. The determination of ethanol using a tin oxide (SnO2) electrochemical sensor combined either with a home-built gas chromatography (GC) or flow injection analysis (FIA) instrument was done. Headspace (HS) sampling technique was applied as the sample preparation method for GC and the detection method for FIA to reduce sample matrix effects. Various experimental conditions including flow rate and injection volume for FIA, and headspace volume for GC, were optimized. The results showed that both HS-FIA-SnO2 and HS-GC-SnO2 are simple and fast techniques for ethanol quantification.
Neil Danielson, Ph.D (Advisor)
Carole Dabney-Smith, Ph.D (Committee Chair)
Rick Page, Ph.D (Committee Member)
Benjamin Gung, Ph.D (Committee Member)
Jason Berberich, Ph.D (Committee Member)
225 p.
Analytical Chemistry; Environmental Science
Adsorption; Fluoropolymer; Fixed-bed; PFOA; Gas chromatography; Flow injection analysis; Ethanol

Recommended Citations

Citations

  • Xie, R. (2023). Development of Mixed Retention Mode Adsorbents for Perfluorooctanoic Acid and Tin Oxide Electrochemical Sensor for On-line Ethanol Determination [Doctoral dissertation, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1688688181131944

    APA Style (7th edition)

  • Xie, Ruichao. Development of Mixed Retention Mode Adsorbents for Perfluorooctanoic Acid and Tin Oxide Electrochemical Sensor for On-line Ethanol Determination. 2023. Miami University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1688688181131944.

    MLA Style (8th edition)

  • Xie, Ruichao. "Development of Mixed Retention Mode Adsorbents for Perfluorooctanoic Acid and Tin Oxide Electrochemical Sensor for On-line Ethanol Determination." Doctoral dissertation, Miami University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=miami1688688181131944

    Chicago Manual of Style (17th edition)

miami1688688181131944
317
© 2023, some rights reserved.Creative Commons License Development of Mixed Retention Mode Adsorbents for Perfluorooctanoic Acid and Tin Oxide Electrochemical Sensor for On-line Ethanol Determination by Ruichao Xie is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Miami University and OhioLINK.