highly significantp < 0.01
The removal efficiencies of 1 g/L and 2 g/L of ZnO were significantly different from 2 h to 24 h ( p < 0.05) and showed highly significant differences from 6 h to 24 h ( p < 0.01).
The removal efficiencies of 1 g/L and 2 g/L of ZnO were significantly different from 2 h to 24 h ( p < 0.05) and showed highly significant differences from 6 h to 24 h ( p < 0.01).