Concentration of Trichloronitromethane in Conventional Water Treatment Process

Abstract:

A sampling survey investigated the formation of a nitrogenous disinfection by product trichloronitromethane (TCNM) from pre chlorination, and the reduction of TCNM concentrations by subsequent conventional water treatment processes, i.e. coagulation, sedimentation, and filtration, with different seasons. The level of the measured TCNM had little change with the seasons, and were closely correlated with the dissolved organic nitrogen (DON), suggesting that DON plays an essential role in the formation of TCNM. The conventional treatment filtration had a certain effect on the reduction of TCNM.

Key words:trichloronitromethane; nitrogenous disinfection by product; dissolved organic nitrogen; formation model