Pilot-scale field study for vanadium removal from mining-influenced waters using an iron-based sorbent

This study investigated the removal of vanadium from mining waters at a closed mine site (Mustavaara, Finland) using granular ferric oxyhydroxide (CFH-12) on pilot scale. Two filter systems, A and B, were placed in different streams, where influent contained higher very variable concentration (6.46–99.1 mg/L), while B treated had lower concentrations (0.443–2.33 mg/L). The operation periods 51 days for 127 B. Water quality analyses revealed that was efficiently captured system both pilots. X-ray fluorescence analysis beds not fully saturated with vanadium. photoelectron spectroscopy confirmed oxidised (5+) existed used CFH-12 carbon content material increased due to adsorbed organic compounds. For comparison, lab-scale coagulation experiments conducted sulphate (the sampled batch 15.9 mg/L V). optimum coagulant dosage 350 (> 93% removal) original pH (7.8–7.9) influent, whereas required amount decreased when adjusted 4.6–4.8.