Geochemical Modeling of Trivalent Chromium Migration in Saline-Sodic Soil during Lasagna Process: Impact on Soil Physicochemical Properties

Table 3

Codification and ranges of factors.

Variable	Designation	Units	Coded variable levels
			−1	0	+1
Polarity reversal	𝐴	hr	0	24	48
Voltage gradient	𝐵	V/cm	0.2	0.6	1
Concentration	𝐶	mg/kg	20	60	100