研究目的
To develop and evaluate a novel UV/pre-magnetized Fe0/H2O2 process for the cost-effective removal of antibiotics from secondary wastewater effluents, exploring its performance, mechanisms, and advantages over existing advanced oxidation processes.
研究成果
The UV/pre-Fe0/H2O2 process is highly effective for removing and mineralizing antibiotics in secondary wastewater effluents at neutral pH, with significant synergetic effects, faster degradation rates, and lower costs compared to other AOPs. It shows promise for practical applications in wastewater treatment.
研究不足
The process may be limited by the need for UV irradiation, which could increase energy costs, and the potential interference from high concentrations of certain ions or organic matter in real wastewater. Optimization is required for scale-up and varying water matrices.
1：Experimental Design and Method Selection:
The study designed experiments to test the UV/pre-magnetized Fe0/H2O2 process under various conditions, including different concentrations of Fe0, H2O2, pH, and presence of ions and natural organic matter (NOM). Theoretical models involved Fenton-like reactions and photolysis mechanisms.
2：Sample Selection and Data Sources:
Secondary wastewater effluent from Tianjin, China, was used, spiked with antibiotics (OTC, TC, SD, SMT) to achieve specific concentrations. Water quality parameters were measured (e.g., Cl-, SO4^2-, HCO3^-, TOC, COD).
3：List of Experimental Equipment and Materials:
Equipment included a UV lamp (GPH150T, 6W, 254 nm), mechanical stirrer, HPLC (UltiMate 3000) with BEH C18 column, TOC analyzer (Analytikjena multi N/C 3100), potentiostat (CHI 760E), and electromagnet (EM3) for magnetization. Materials included Fe0 powder, H2O2, antibiotics, and chemicals from suppliers like Aladdin China Company.
4：Experimental Procedures and Operational Workflow:
Fe0 was pre-magnetized using a 200 mT magnetic field for 2 min. Batch experiments involved adding Fe0 or pre-Fe0 and H2O2 to solutions, stirring at 350 rpm, and irradiating with UV light. Samples were collected at intervals, filtered, and analyzed for pollutant concentrations and other parameters.
5：Data Analysis Methods:
Data were analyzed using pseudo-first-order kinetics, synergetic factors, and economic evaluation (EE/O). Statistical analysis included fitting degradation data to kinetic models and comparing rates and costs.
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