Efficient peroxymonosulfate activation by microscale CuO coated melamine-cyanuric acid supramolecular toward tetracycline degradation
For reducing the amount and fully utilizing active sites of CuO, microscale CuO coated melamine-cyanuric acid supramolecular assembly (CuO/MCSA) was developed in situ and empolyed as efficient peroxymonosulfate (PMS) activator for water decontamination. The characteristics of CuO/MCSA were characterized by XRD, FT-IR, XPS, SEM, TEM and BET. CuO/MCSA showed strong catalytic ability to activate PMS for tetracycline (TC) degradation. Under the condition of pH≈7 and PMS dosage of 0.5 mmol /L, 1 g/L CuO/MCSA including less than 3.0 wt% CuO can remove about 70% of 20 mg/L TC within 5 min. And after five consecutive cycles, the degradation rate of CuO/MCSA was still around 52.6%. PMS dosage, reaction temperature and initial pH value, co-existing anions and small molecule acids all affected the performance of CuO/MCSA/PMS system on TC degradation. According to the quenching experiments and electron paramagnetic resonance (EPR) test, 1O2 played the most important role in TC degradation in CuO/MCSA/PMS system. In addition, CuO/CSA/PMS system exhibited wide applicability, which can effectively remove TC in different water bodies (deionized water, tap water and lake water) and various pollutants (TC, methylene orange and methyl blue). Overall, this work provided an effective strategy to enhance the efficient utilization of catalyst for PMS activation.
危险品化学品经营许可证（带存储）