Barzegar Gelavizh, Sabaghan Mohammad, Azadbakht Omid, Aghayani Ehsan, Mahdavianpour Mostafa, Kadier Abudukeremu, Fallahizadeh Saeid, Ghanbari Farshid
Behbahan Faculty of Medical Sciences, Behbahan, Iran.
Research Center for Environmental Contaminants (RCEC), Abadan University of Medical Sciences, Abadan, Iran E-mail:
Water Sci Technol. 2023 Mar;87(5):1029-1042. doi: 10.2166/wst.2023.059.
In this work, MnO/FeO (MFO) was synthesized and used to activate monopersulfate (MPS) for the degradation of ciprofloxacin (CIP). The effect of several parameters was studied on CIP degradation. Under the optimum conditions (pH = 6.3 (natural pH), MFO = 300 mg/L and MPS = 2 mM), around 92% of CIP was decomposed. Nitrite, phosphate and bicarbonate ions had a strong inhibitory effect on the MFO/MPS process while the effect of chloride and nitrate ions was neutral. The catalytic activity of MFO was also studied by other chemical oxidants such as peroxydisulfate, periodate, hydrogen peroxide, percarbonate and peracetic acid. Scavenging tests showed that the role of sulfate radicals is more than hydroxyl radicals. MFO exhibited high catalytic activity in four recycling with insignificant leaching of Mn and Fe. During CIP oxidation, 45.5% carbon mineralization occurred and antibacterial activity of treated CIP solution was reduced. Finally, MFO/MPS was applied on actual wastewater (hospital effluent) and the results showed that MFO/MPS can be considered as a practical method for the treatment of contaminated water with emerging pollutants.
在本研究中，合成了MnO/FeO（MFO）并用于活化过一硫酸盐（MPS）以降解环丙沙星（CIP）。研究了几个参数对CIP降解的影响。在最佳条件下（pH = 6.3（自然pH），MFO = 300 mg/L，MPS = 2 mM），约92%的CIP被分解。亚硝酸根、磷酸根和碳酸氢根离子对MFO/MPS过程有强烈的抑制作用，而氯离子和硝酸根离子的影响则为中性。还通过过二硫酸盐、高碘酸盐、过氧化氢、过碳酸盐和过氧乙酸等其他化学氧化剂研究了MFO的催化活性。自由基清除试验表明，硫酸根自由基的作用大于羟基自由基。MFO在四次循环中表现出高催化活性，Mn和Fe的浸出量微不足道。在CIP氧化过程中，发生了45.5%的碳矿化，处理后的CIP溶液的抗菌活性降低。最后，将MFO/MPS应用于实际废水（医院废水），结果表明MFO/MPS可被视为处理含有新兴污染物的受污染水的一种实用方法。
