Figure 1

Effects of CuO NPs on the variations of NO3−-N (solid, A), NO2−-N (hollow, A) and N2O-N (B) during 24 h exposure tests.
Error bars represent standard deviations of triplicate measurements.

Effects of CuO NPs on the variations of NO3−-N (solid, A), NO2−-N (hollow, A) and N2O-N (B) during 24 h exposure tests.
Error bars represent standard deviations of triplicate measurements.