highly significantp > 0.1
The regression model p -value < 0.0001 indicates that the model is highly significant; at p > 0.1, the model is not significant [ 41 ].
The regression model p -value < 0.0001 indicates that the model is highly significant; at p > 0.1, the model is not significant [ 41 ].
Both MgO and CaO yields in the pyrolyzed phosphate tailings showed a decreasing trend after the H 2 O pressure exceeded 0.02 MPa.
It can also be found from Figure 9 that the activity of MgO showed a trend of gradual growth followed by a sharp drop with the increase in temperature.