Tetracycline degradation by activated persulfate with enhancement of ZIF-67 loaded wood-microreactor

Antibiotics exhibit high persistence and ecotoxicity in aquatic environments, and numerous existing methods for their degradation are either expensive or inefficient. In this study, a wood-based microreaction system (ZIF67@FDNW) was developed for the efficient degradation of antibiotics. The microreaction system consists of a wood-based microreactor, in which ZIF-67 is in situ loaded, and a PMS solution. The wood-based microreactors are fabricated through the selective removal of lignin and hemicellulose from natural wood, followed by subsequent chemical modification. The loading of ZIF-67 onto the surface of the wood-based microreactor enables the catalytic degradation of tetracycline using persulfate (PMS) as the oxidant. The microreactor was characterized using SEM, EDS, FT-IR, XRD, and XPS techniques. Additionally, the kinetics, degradation performance, and underlying principles of the microreactor in the PMS system were thoroughly investigated. The wood-based microreactor exhibits high efficiency (94 %) and degradation rates under varying pH values and initial concentrations. Furthermore, it demonstrates remarkable regeneration capability (The degradation efficiency over a 12-hour period remains consistently high at 85 %) and stability. This study expands the application of wood in antibiotic wastewater treatment and presents a novel approach utilizing MOFs catalyzed PMS system for TCH removal from water environments.