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Differentiation of adsorption and degradation in steroid hormone micropollutants removal using electrochemical carbon nanotube membrane

Author

Listed:
  • Siqi Liu

    (Karlsruhe Institute of Technology (KIT))

  • David Jassby

    (University of California, Los Angeles)

  • Daniel Mandler

    (The Hebrew University of Jerusalem)

  • Andrea I. Schäfer

    (Karlsruhe Institute of Technology (KIT))

Abstract

The growing concern over micropollutants in aquatic ecosystems motivates the development of electrochemical membrane reactors (EMRs) as a sustainable water treatment solution. Nevertheless, the intricate interplay among adsorption/desorption, electrochemical reactions, and byproduct formation within EMR complicates the understanding of their mechanisms. Herein, the degradation of micropollutants using an EMR equipped with carbon nanotube membrane are investigated, employing isotope-labeled steroid hormone micropollutant. The integration of high-performance liquid chromatography with a flow scintillator analyzer and liquid scintillation counting techniques allows to differentiate hormone removal by concurrent adsorption and degradation. Pre-adsorption of hormone is found not to limit its subsequent degradation, attributed to the rapid adsorption kinetics and effective mass transfer of EMR. This analytical approach facilitates determining the limiting factors affecting the hormone degradation under variable conditions. Increasing the voltage from 0.6 to 1.2 V causes the degradation dynamics to transition from being controlled by electron transfer rates to an adsorption-rate-limited regime. These findings unravels some underlying mechanisms of EMR, providing valuable insights for designing electrochemical strategies for micropollutant control.

Suggested Citation

  • Siqi Liu & David Jassby & Daniel Mandler & Andrea I. Schäfer, 2024. "Differentiation of adsorption and degradation in steroid hormone micropollutants removal using electrochemical carbon nanotube membrane," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52730-7
    DOI: 10.1038/s41467-024-52730-7
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