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Effect of pH on Adsorption of Tetracycline Antibiotics on Graphene Oxide

Author

Listed:
  • Zhenghao Li

    (College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China)

  • Hua Jiang

    (College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China)

  • Xipeng Wang

    (College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China)

  • Cunfang Wang

    (College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China)

  • Xiangsheng Wei

    (Shandong Aifudi Biological Co., Ltd., Jining 272000, China)

Abstract

Graphene oxide (GO) has good dispersibility and adsorption capacity for antibiotics adsorption, a complex process influenced by many factors. In this work, the adsorption mechanism of GO on tetracycline antibiotics at different pH was studied to address its attenuated effects on the microbial growth. The results showed that the adsorption process of GO on three antibiotics, namely, tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC), followed the pseudo-second-order kinetic model. The maximum adsorption capacities were observed at pH5 which were 133.0 mg/g for TC, 125.4 mg/g for OTC, and 167.0 mg/g for CTC. Furthermore, the reaction was uniform adsorption with a single layer on the surface of GO, and heating was conducive to the reaction. In the microbial growth experiment, the growth of E. coli and B. subtilis senses was optimal at pH5, which was consistent with the adsorption experiment. This study analyzed the effect of pH on the adsorption of antibiotics by GO and provided a theoretical basis for the further application of GO in various aquatic environments.

Suggested Citation

  • Zhenghao Li & Hua Jiang & Xipeng Wang & Cunfang Wang & Xiangsheng Wei, 2023. "Effect of pH on Adsorption of Tetracycline Antibiotics on Graphene Oxide," IJERPH, MDPI, vol. 20(3), pages 1-16, January.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:3:p:2448-:d:1051158
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