Effects of Initial Nitrate Concentrations and Photocatalyst Dosages on Ammonium Ion in Synthetic Wastewater Treated by Photocatalytic Reduction

Table 3

Results of multiple linear regression analysis.

Photocatalyst	Independent variables			value	value
TiO2	[]0	6.879	0.925	15.395	0.000
	Dosage	0.184	0.288	4.787	0.000
	Constant	-1.489		-1.643	0.119
, , , and value < 0.001.
1.0%Ag-TiO2	[]0	0.274	0.838	11.96	0.000
	Dosage	6.064	0.407	5.63	0.000
	Constant	-3.744		-2.16	0.045
, , , and value < 0.001.