▎ 摘　　要

Iron-based heterogeneous catalysts exhibit great peroxymonosulfate (PMS) activation ability to degrade persis-tent antibiotic pollutants, but the catalytic efficiency of this process is significantly affected by Fe(III)/Fe(II) conversion rate. Herein, we designed a novel biomineralization regulation process to fabricate graphene oxide modified schwertmannite composites (Sch-GOx) as light-assisted PMS activator for enhancing sulfathiazole (STZ) degradation. More specifically, the introduction of GO in biomineralization process not only facilitated the dispersion of Sch, but also accelerated the regeneration of available surface-bound = Fe(II) in resultant Sch-GOx through intramolecular electron transfer, thus promoting the activation of PMS. Compared with biosynthesized Sch without modification, the prepared Sch-GO100 sample exhibited superior catalytic activity in light-assisted PMS activation process, 99.90 % removal efficiency of 78 mu M STZ has been achieved within 30 min without pH adjustment (initial pH = 7.20). Abundant reactive oxygen species including SO4 center dot- , (OH)-O-center dot, O-2(center dot-) and O-1(2) were responsible for the effective elimination of STZ. The potential degradation intermediates of STZ were investi-gated by liquid chromatography-mass spectrometry (LC-MS) and demonstrated to be less toxic than STZ using the ecological structure activity relationship program (ECOSAR). This study provided a facile and environmental-benign strategy of biomineralization regulation to fabricate effective iron-based PMS activator for environmental remediation.