CARBON FELT MODIFICATION WITH HNO3 FOR THE ELECTRO-FENTON PROCESS OF DEGRADATION ORGANIC POLLUTANTS IN THE AQUATIC ENVIRONMENT

  • Nguyen Thu Ha Bui Graduate University of Science and Technology, Vietnam Academy of Science and Technology; Land Administration Department, Hanoi University of Natural Resources and Environment
  • Quang Thang Phan Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology
  • Trung Dung Nguyen Faculty of Physics and Chemical Engineering, Le Quy Don Technical University
Keywords: Electro-Fenton, carbon felt, levofloxacin, hydroxyl free radical

Abstract

In this study, the authors modified the surface of raw carbon felt (CF) using concentrated HNO3 for durations ranging from 0 to 12 hours at temperatures between 30°C and 90°C. The structural morphology of both the raw CF and the modified CF was characterized using SEM, EDX, XRD, FT-IR, and contact angle methods. The results showed that the CF modified for 6 hours at 30°C exhibited the highest degradation efficiency for LFX. After 90 minutes of reaction, the degradation efficiency for LFX reached 79.65%. Additionally, the modified CF electrodes demonstrated flexibility and high applicability in degrading various organic pollutants such as oxytetracycline, tartrazine, rhodamine B, methyl orange, and methyl blue, achieving degradation efficiencies of 64.64-97.14% after 45 minutes of reaction. Furthermore, long-term stability tests confirmed its relatively stable performance after 3 cycles.

điểm /   đánh giá
Published
2025-05-19
Issue
Vol. 3 No. 01 (2025)
Section
SCIENTIFIC RESEARCH