Degradation of metoprolol from wastewater in a bio-electro-Fenton system

Advanced oxidation processes (AOPs) have been intensely studied for the removal of refractory pollutants because strong oxidizing capacity hydroxyl radical. One emerging AOP methods gaining increased attention is bio-electro-Fenton (BEF) which can generate radical in-situ in cathode chamber using energy harvested by exoelectrogenic bacteria anode. In this study, feasibility BEF technology metoprolol, a typical micropollutant widely found water environment, was first time investigated. It that applied voltage and working pH had significant effect on efficiency while Fe2+ dosage as catalyst showed little effect. Besides radical, metoprolol might be adsorbed surface reactor, electrode, precipitated with iron sludge, especially at neutral pH. batch experiment supplied 0.2 V, 3, dose mM, rate synthetic wastewater real effluent from secondary sediment tank 66% 55% within 12 h, respectively. A possible degradation pathway proposed. Then continuous flow system further different hydraulic retention times (HRTs) 2, 4, 6 about 77%, 92%, 95% observed. toxicity test (less than 20% inhibition bioluminescence) during treatment cost analysis (5.269 × 10?3 kWh/order/m3) treating 10 ?g/L containing mode implied proposed has potential treatment.