Arsenic Removal from Natural Groundwater by Electrocoagulation Using Response Surface Methodology

Table 2

Consumption of electrode (𝑤) and energy (𝐸), mean potential drop (𝑈), and treatment time (𝑡) to obtain an As concentration of 10 𝜇g L⁻¹ during the EC treatments with natural water performed at liquid flow rates of 0.25, 0.50, and 1.00 L min⁻¹ and applied current densities of 5, 10, and 20 A m⁻².

Flow; (L min^−1)	𝑖; (A m^−2)	𝑈; (V)	𝑡; (s)	𝑤; (g m^−3)	𝐸; (Wh m^−3)
0.25	5	2.776	170.40	13.65	50.781
	10	3.529	156.00	24.96	108.606
	20	4.176	127.20	40.71	202.952
0.50	5	2.774	177.60	14.23	52.602
	10	3.556	156.60	25.06	109.780
	20	4.409	139.80	44.74	234.349
1.00	5	2.301	300.00	24.03	70.843
	10	3.558	264.60	42.34	180.425
	20	4.639	177.00	56.65	309.815