▎ 摘　　要

The advanced oxidation process of perdisulfate (PDS) presents strong oxidation ability for different kinds of industrial wastewater treatments. Graphene is a stable and loss-free PDS catalyst that can be doped using S atoms to improve the catalytic activity of PDS. Thus, sulfur-doped graphene (S@RGO) was prepared and applied to catalyze PDS for bisphenol A (BPA) and complex microbial flora destruction given the threat of both refractory organism and complex microbial flora. The characterization indicated that S doping is beneficial to increase the defect degree of graphene and enhance the catalytic activity. BPA can be degraded rapidly without disturbance of complex microbial flora during the reaction. Fluorescent substances, proteins and polysaccharides in different layers of extracellular polymeric substances (EPS), and even the tightly-bound extracellular polymeric substances TB-EPS layer closely bound to the microbial flour can be decomposed and result in the breakdown of microbial flora without the protection of EPS. Leaching of LDH and DNA confirmed the destruction of cell membrane for microbial flora breakdown. Dominant microbial floras of Proteobacteria, Chloroflexi, Bacteroidetes, Nitrospirae, and Acidobacteria were effectively destroyed. The mechanism analysis indicated that not only strong free radicals (SO4-center dot, center dot OH and O-1(2)) contributed to the disintegration of EPS skeleton and inactivation of microbial flour and electron transference among "S@RGO-PDS-complex microbial flora" is also a critical factor. The synergetic system of S@RGO/PDS showed high application potential as a complicated wastewater treatment.