LAUSR

ABSTRACT The electrocoagulation process using hybrid aluminum-iron electrode was used for the removal of arsenic and fluoride from water. The operation parameters; current density, initial pH, treatment time, initial concentration of arsenic and fluoride were optimized using the Box Behnken Design. The R2 values for arsenic and fluoride removal were 0.83 and 0.96, respectively ensure a satisfactory of a developed quadratic model. At the optimized operation parameter of 9.90 mAcm−2, pH 7.5; the Al-Fe EC reduced 16 mg/L and arsenic 200 µg/L to 1.12 mg/L and 9.60 µg/L, respectively in 50 minutes with an operating cost estimated to 0.99 $/m3.