Feasibility of Using Sequential Sulfurized Nanoscale Zerovalent Iron-Persulfate Process to Degrade Tetrabromobisphenol A

This study proposed a sequential redox process to partially degrade tetrabromobisphenol A (TBBPA) within reactor great extent. After 72 hours in an anoxic environment, 20 ppm of TBBPA could be effectively degraded by sulfurized zerovalent iron nanoparticles (S-nZVI) at concentrations 2 g L-1 and 4 L-1. Biphenol (BPA) together with tri-, di-, monobromobisphenol was detected high-performance liquid chromatography (HPLC) suggesting that debrominated S-nZVI stepwise manner. Following the treatment, persulfate-advanced oxidation (PS-AOP) system persulfate varied from 5 mM incorporated final byproduct, BPA, for hours. The two-stage anoxic/oxic reactions same initial conditions (0.037 TBBPA, S-nZVI, pH 6 stage, PS latter oxic stage) were investigated. layer played important role such hypothetically contributes increasing electron transfer Fe0 core as well hydrophobicity NP surface. It demonstrated S-nZVI/PS-AOP remediate BPA consequently provide promising strategy remedy brominated organic pollutants environment.