Formation, Analysis, and Removal of Halogenated Cyclic DBPs

In recent years, halogenated cyclic disinfection byproducts (DBPs) have received widespread attention due to their greater developmental toxicity compared to aliphatic ones, and were recognized to be the primary contributors to the overall developmental toxicity of chlorinated drinking water. This chapter provided a brief summary for the recent research progress on the analysis, occurrence, formation, and elimination strategies of halogenated cyclic DBPs, primarily including halobenzoquinones (HBQs), mutagen X (MX), trihalo-hydroxy-cyclopentene-diones (trihalo-HCDs), halonaphthoquinones (HNQs), chlorophenylacetonitriles (CPANs), halogenated pyridinols, haloanilines, haloquinone chloroimides (HQCs), halophenylacetamides (HPAcAms), halobenzamides (HBZAMs), and halogenated nucleic acids. The authors aim to provide some basic information for understanding the health risk associated with halogenated cyclic DBPs and potential future research for scholars working in the field of drinking water.