Preparation of Co-Fe based Prussian blue analogs loaded nickel foams for Fenton-like degradation of tetracycline

Sulfate radical-based advanced oxidation processes (SR-AOPs) were frequently utilized for the degradation of various organic pollutants due to their efficient and clean advantages. In this work, Co-Fe based Prussian blue analogues (PBA) nanoparticles were firmly immobilized on nickel foam (NF) as a novel activator for peroxymonosulfate (PMS), and the complete degradation of tetracycline (TC) was achieved within 20 min under optimal conditions. The TC degradation efficiency of samples were investigated under various factors including Co loading, PMS dosage, initial TC concentration, pH, and inorganic anions. The mechanism for PMS activation indicated that reactive oxygen species including sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen contributed to TC degradation. The possible pathway of TC degradation was investigated by liquid chromatography-mass spectroscopy. This work presented a new combination of efficient and easily recoverable supported catalysts and provided useful information for the wastewater treatment.