Degradation Kinetics of Photoelectrocatalysis on Landfill Leachate Using Codoped TiO₂/Ti Photoelectrodes

Table 2

Effect of various operating conditions on initial rate by photoelectrocatalysis process.

Number	Initial pH	Potential bias	COD0/mgL^−1	/K	Polynomial regression constant					Initial /mg·(Lm)^−1	equation^(1)
					-1	2	20	4378				303	1.009	−0.018			0.978	0.018	(); ^(2); = 0.978
-2	4	20	4378	303	0.987	−0.014			0.931	0.014
-3	6	20	4378	303	0.997	−0.009			0.986	0.009
-4	8	20	4378	303	0.995	−0.006			0.948	0.006
-5	10	20	4378	303	0.994	−0.005			0.972	0.005
-1	7	5	4378	303	1.004	−0.004			0.986	0.004	(); = 0.998
-2	7	10	4378	303	1.006	−0.003			0.976	0.003
-3	7	15	4378	303	0.993	−0.003			0.976	0.003
-4	7	18	4378	303	1.005	−0.004			0.972	0.004
-5	7	20	4378	303	0.986	−0.019			0.96	0.019
-6	7	23	4378	303	0.982	−0.021			0.92	0.021
-1	7	20	4378	303	2189.8	−17.6			0.997	17.6	(); = 0.972
-2	7	20	2189	303	1470.7	−16.7			0.963	16.7
-3	7	20	1459	303	1112.8	−4.8			0.947	4.8
-4	7	20	1059	303	874.8	−2.5			0.991	2.5
-5	7	20	876	303	725.8	−5.0			0.990	5.0
-1	7	20	4378	283	1.004				0.994		(); ^(3); = 0.967
-2	7	20	4378	293	0.994	−0.001			0.99	0.001
-3	7	20	4378	303	0.984	−0.018			0.949	0.018
-4	7	20	4378	313	0.994	−0.008			0.994	0.008
-5	7	20	4378	323	0.999	−0.010			0.98	0.010

() represents pH, potential bias, and initial COD concentration, respectively; () this equation only represents polynomial fitting under pH range from 2 to 10; () this equation represents / equation.