“…The efficacy of the oxidant determines how well AOPs perform [45] . AOPs investigated for NRFX removal include photocatalysis [ 27 , [46] , [47] , [48] ], photolysis [ 49 , 50 ], chlorine processes [51] , [52] , [53] , ozonolysis [54] , [55] , [56] , sonolysis [57] , sonocatalysis [ 28 , 58 ], Fenton (sono-Fenton, electro-Fenton, and photo-Fenton, etc.) [ 25 , [59] , [60] , [61] , [62] ].…”