For
instance, CHBrCl2 can affect human placental trophoblasts that
produce a hormone required during pregnancy [3,4]. Moreover,
the research of Lyon et al. showed that the risk of bladder cancer
was lower when THM concentrations were less than 8 lg/L in
drinking water [5–7]. Thus, health and environmental authorities
have announced limits on THMs in drinking water. In terms of
the US Environmental Protection Agency (U.S. EPA) requirement,
the maximum concentration of total trihalomethanes (TTHMs)
allowed in drinking water is 80 lg/L [8]. Therefore, methods to
reduce THMs in water treatment plants or control THM formation
are possibly of great significance.