Comparative Study of Wastewater Disinfection By-product Formation during Wastewater Disinfection by Peracetic Acid versus Sodium Hypochlorite.

摘要

This study comparatively investigated disinfection by-products (DBPs) formed from wastewater disinfection with peracetic acid (PAA) versus sodium hypochlorite (NaClO). Gas chromatography and mass spectrometry (GC/MS) was used for DBPs analysis. It was found that the changing characteristics of wastewater influenced the detection and reproducibility of DBPs formed, resulting in no identification of any of the DBPs detected.;DBPs formed from oxidation of the 17β-estradiol (E2), clofibric acid, and ketoprofen by PAA and NaClO were also studied. Both PAA and NaClO reduced E2: 13.5% reduction by PAA and two DBPs were detected: 2- or 4-CH 3O-E2 and one unknown compound; 92.3% reduction by NaClO and three DBPs were detected: 2- or 4-chloro-E2, 2- or 4-chloro-E1, and one unknown compound. 26.5% reduction of clofibric acid was found by both PAA and NaClO oxidation, and no DBPs were detected. Neither reduction nor DBPs were found by both PAA and NaClO oxidation of ketoprofen.