Al3+ doped CuFe2O4 efficiently activates peroxymonosulfate for long-term and stable degradation of tetracycline: Synergistic and regulatory role of Al3+

•Al3+ can significantly improve the electron transfer efficiency of the catalyst.•CAl0.3FO has excellent catalytic properties in the pH range of 3-11.•Fe-O-Al and Cu-O-Al bonds anchor metal ions and reduce metal ion leaching.•Radicals and non-radicals act synergistically.•Immobilized alginate/CAl0.3FO facilitates the realization of practical applications.