Unraveling the Evolution of Organohalogens and Their Associated Toxicity Changes in the Chlorination of Preozonated Reclaimed Water Containing Bromide
Chang-Jie Yuan,
Zhi-Min Song,
Min Liu
et al.
Abstract:Ozonation is widely used to remove precursors and control disinfection byproducts (DBPs) in postchlorination. However, ozonation itself forms highly toxic Br-DBPs in the presence of bromide, yet little is known about the evolution of toxicity and Br-DBPs during postchlorination. Ten mg/L O 3 of wastewater containing 2 mg/L bromide increased the cytotoxicity from 3.5 to 6.8 to 5.7−21.4 mg-phenol/L (genotoxicity from 0.25 to 2.1 μg-4-NQO/L). Postchlorination (10 mg of Cl 2 /L) further increased the cytotoxicity … Show more
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