Efficiency of reduction of trace nitrosodimethylamine (NDMA) in water by zero-valent zinc

Abstract:

To investigate the removal efficiency of nitrosodimethylamine(NDMA) from water by zero-valent zinc,reduction experiments of trace concentration of NDMA by zero-valent zinc were carried out,and the effects of the initial amount of zinc,initial concentration of NDMA,dissolved oxygen concentration,solution pH,temperature on the reduction of NDMA were studied.With the initial amount of 10 g·L-1 zinc,the removal efficiency of NDMA could reach to above 99% at the reaction time of 14 h.The effect of dissolved oxygen and initial NDMA concentration on the reduction of NDMA are not remarkable while the pH and the temperature of solution could influence the reduction of NDMA by zinc greatly.The smaller the pH is or the higher the temperature is,the higher the removal rate of NDMA is.