Laccase was immobilized as magnetic cross-linked enzyme aggregates (M-CLEAs).
Laccase at 40 U/mL eliminated over 80 μg/mL TC at pH 6 and 25 °C in 12 h.
A mechanism of laccase-mediated tetracycline (TC) oxidation was proposed.
TC antibiotics treated with laccase showed reduced antimicrobial activity.
Laccase M-CLEAs are a green alternative in residual antibiotic removal in water.