Simultaneous removal of fluoride and arsenic from water by hybrid Al-Fe electrocoagulation: process optimization through surface response method
Magori J. Nyangi, Yonas Chebude, Kessy F. Kilulya, Andrew Minu
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.
Topics & Concepts
ArsenicElectrocoagulationChemistryFluorideBox–Behnken designAluminiumResponse surface methodologyNuclear chemistryInorganic chemistryChromatographyOrganic chemistryPhysical chemistryArsenic contamination and mitigationAdvanced oxidation water treatmentEnvironmental remediation with nanomaterials