Arsenic Removal from Natural Groundwater by Electrocoagulation Using Response Surface Methodology

Table 3

Processing parameters of the 3² factorial design and values of response variables obtained during the EC treatments performed in the perfectly mixing reactor.

Treatments; 𝑇	Variables				Responses
	Reals		Staggered
	𝑄; (L min^−1)	𝑖; (A m^−2)	𝑋1	𝑋2	𝑈; (V)	𝑡; (s)	𝐸; (Wh m^−3)
1	0.25	5	1	1	2.776	170.40	50.781
2		10	1	2	3.529	156.00	108.606
3		20	1	3	4.176	127.20	202.952
4	0.50	5	2	1	2.774	177.60	52.602
5		10	2	2	3.556	156.60	109.780
6		20	2	3	4.409	139.80	234.349
7	1.00	5	3	1	2.301	300.00	70.843
8		10	3	2	3.558	264.60	180.425
9		20	3	3	4.639	177.00	309.815