Uranium removal from Pyhäsalmi/Finland mine water by batch electrocoagulation and optimization with the response surface methodology

From the analysis of variances (ANOVA), quadratic models have been employed for uranium removal, showing high coefficients of determination (R2) of 0.890 and 0.903 for iron-stainless steel and aluminum-stainless steel anode/cathode combinations, respectively. The optimum conditions for current density and reaction time are 70 mA/cm2 and 120 min, respectively, where 99.7% and 97.7% of uranium removal by iron-stainless steel and aluminum-stainless steel anode/cathode combinations could be obtained.