The Environmental Fates and Risk Assessment of N-nitrosodimethylamine

N-nitrosodimethylamine (NDMA) is carcinogenic. To estimate current risk of NDMA to human health in a given area, Level III multimedia fugacity model has been used to simulate the fate and risk of NDMA in environment. The calculated NDMA concentration in water which is strongly related to the disinfection by chlorination agrees well with that measured. The biggest bulk sink of NDMA is water, which accounts for 99.4% of total amount of NDMA in the environment. Transporting from air to water is the major intermedia transfer processes, while reaction and advection in water is the main pathway for NDMA disappearing in environment.