Progress of the Research of Nitrogenous Disinfection By-Products Haloacetonitriles (HANs) in Drinking Water

The presence of Haloacetonitriles (HANs) in drinking water is of concern due to its high genotoxi-city and cytotoxicity compared with regulated DBPs. Moreover, a shift from chlorination to chlora-mination increased the products of HANs. This paper provides a critical review of the property, the toxicity and the removal method of HANs. Exploring effective method to remove HANs and its precursors is one of the developing direction.