Degradation of tetracycline by activating persulfate using biochar-based CuFe2O4 composite

Zhang, Wei; Feng, Shijun; Ma, Jianfeng; Zhu, Fang; Komarneni, Sridhar

Degradation of tetracycline by activating persulfate using biochar-based CuFe2O4 composite

2022

Zhang, Wei | Feng, Shijun | Ma, Jianfeng | Zhu, Fang | Komarneni, Sridhar

Biochar derived from Lentinus edodes (LBC) and CuFe₂O₄ (CuFe₂O₄@LBC) composites were prepared by the hydrothermal method, and were applied to activate persulfate (PDS) for degrading tetracycline (TC) in a wide pH range. The CuFe₂O₄@LBC composites were characterized by XRD, FTIR, SEM, and XPS. LBC-derived biochars greatly reduced the aggregation of CuFe₂O₄ particles and enhanced the catalytic performance of CuFe₂O₄. CuFe₂O₄@LBC catalyst could remove 85% of tetracycline within 100 min under visible light. In addition, the removal rate of TC reached 76% after five cycles, indicating that the composite had good stability and reusability. Simple classical quenching experiments suggested that the degradation of TC could be mainly attributed to •OH and •S [Formula: see text].

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